EXHIBIT 4.8
                        THE COMMONWEALTH OF MASSACHUSETTS
                 OFFICE OF THE MASSACHUSETTS SECRETARY OF STATE
                       MICHAEL JOSEPH CONNOLLY, Secretary
              One Ashburton Place, Boston, Massachusetts 02108-1512

                      Federal Identification No. 04-1717070

                        CERTIFICATE OF VOTE OF DIRECTORS
                    ESTABLISHING A SERIES OF A CLASS OF STOCK

                     General Laws, Chapter 156B, Section 26


         We, David B. Perini,  President and Richard E. Burnham, Clerk of Perini
Corporation located at 73 Mt. Wayte Avenue,  Framingham,  Massachusetts 01701 do
hereby  certify that at a meeting of the  directors of the  corporation  held on
January 10, 1997, the following vote  establishing and designating a series of a
class of stock and determining  the relative rights and preferences  thereof was
duly adopted:

That  pursuant  to the  authority  vested  in the  Board  of  Directors  of this
Corporation  in  accordance  with the  provisions  of its  Restated  Articles of
Organization,  as amended, a series of Preferred Stock (the "Series B Cumulative
Convertible  Preferred  Stock") of the Corporation be, and it hereby is, created
and that the designation  and amount thereof and the voting powers,  preferences
and relative, participating,  optional and other special rights of the shares of
such series, and the qualifications, limitations and restrictions thereof are as
set forth on Exhibit A hereto.

                                                                       EXHIBIT A

                 SERIES B CUMULATIVE CONVERTIBLE PREFERRED STOCK

         1.  Designation and Amount.  There shall be a series of Preferred Stock
designated as "Series B Cumulative  Convertible  Preferred Stock" and the number
of shares  constituting such series shall be 500,000,  of which 150,150 shall be
issued initially (the date of such issuance,  the "Original Issue Date") and the
remainder  shall be reserved  for  issuance as  dividends  pursuant to Section 3
below.  The  number of  shares  designated  as  shares  of  Series B  Cumulative
Convertible Preferred Stock may be decreased (but not increased) by the Board of
Directors without a vote of stockholders;  provided,  however,  that such number
may not be decreased  without the approval of the holders of 66-2/3% of the then
outstanding shares of Series B Cumulative Convertible Preferred Stock.

         2.  Preemptive  Rights.  Holders  of  shares  of  Series  B  Cumulative
Convertible  Preferred  Stock are not entitled to any preemptive or subscription
rights in respect of any securities of the Corporation.


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         3.       Dividends.

                  (a) The holders of shares of Series B  Cumulative  Convertible
Preferred  Stock  shall be  entitled  to  receive,  when and as  authorized  and
declared by the Board of Directors  out of funds at the time  legally  available
therefor,  dividends at the Cash Dividend  Rate (defined  below) per annum times
the Liquidation  Preference  (defined below in Section 4(a)) if paid in cash, or
at the In-Kind  Dividend  Rate (defined  below) per annum times the  Liquidation
Preference  if paid in  additional  shares  of Series B  Cumulative  Convertible
Preferred Stock, and no more, which shall be fully cumulative, shall accrue with
respect to any such  share  from the  original  date of  issuance  of such share
without interest and shall be payable quarterly in arrears on March 15, June 15,
September  15  and  December  15 of  each  year  (a  "Dividend  Payment  Date"),
commencing March 15, 1997 (except that if any such date is a Saturday, Sunday or
legal holiday, then such dividend shall be payable on the next day that is not a
Saturday,  Sunday or legal holiday) to holders of record as they appear upon the
stock transfer books of the Corporation on each March 1, June 1, September 1 and
December 1 immediately preceding the payment dates, or such other dates as shall
be  fixed at the  time of the  authorization  and  declaration  by the  Board of
Directors  (or, to the extent  permitted by  applicable  law, a duly  authorized
committee  thereof),  which  date  shall not be less than ten (10) nor more than
sixty (60) days  preceding  the relevant  dividend  payment  date.  For purposes
hereof,   the  term  "legal  holiday"  shall  mean  any  day  on  which  banking
institutions  are  authorized  to close in New  York,  New York.  The  amount of
dividends payable per share of Series B Cumulative  Convertible  Preferred Stock
for each  quarterly  dividend  period  shall be computed by dividing  the annual
dividend  amount by four and shall  include  fractional  shares.  The  amount of
dividends  payable for the initial dividend period and any period shorter than a
full quarterly  period during which shares are outstanding  shall be computed on
the basis of a 360-day  year of twelve  30-day  months and the actual  number of
days  elapsed in the period in which  payable.  No interest  shall be payable in
respect of any dividend payment on the Series B Cumulative Convertible Preferred
Stock or any other Parity Dividend Stock (as  hereinafter  defined) which may be
in arrears.  The "Cash  Dividend Rate" shall be 9 percent per annum if a Special
Default  (defined  below) has occurred and is  continuing at any time during the
applicable  Annual Payment Period (defined  below) or Semiannual  Payment Period
(defined  below),  and shall be 7 percent  per  annum at all  other  times.  The
"In-Kind  Dividend Rate" shall be 12 percent per annum if a Special  Default has
occurred and is  continuing  at any time during the  applicable  Annual  Payment
Period or Semiannual  Payment  Period,  and shall be 10 percent per annum at all
other times.

                  (b) Any dividend  payments may be made, in the sole discretion
of the Board of Directors, as follows (for purposes of this


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determination, the Designated Directors (defined below in Section 13) shall not
vote):

                           (i)      Prior to December 15, 1999:

                                    (1) on or prior to the  Original  Issue Date
and prior to December 15, 1997 and 1998, the Board of Directors  shall determine
whether  dividend  payments  payable  on the next four  Dividend  Payment  Dates
beginning  December 15 (each, an "Annual  Payment  Period") shall be paid in (i)
cash or (ii)  additional  shares of Series B  Cumulative  Convertible  Preferred
Stock valued at the  Liquidation  Preference (but not in any combination of cash
and  additional  shares of Series B  Cumulative  Convertible  Preferred  Stock);
provided, however, that the first Annual Payment Period shall commence March 15,
1997,  and run for three  Dividend  Payment Dates if the Original  Issue Date is
between December 15, 1996 and March 15, 1997;

                                    (2) in the  event  that,  during  an  Annual
Payment  Period  when the Board has  elected  to pay  dividends  on the Series B
Cumulative  Convertible  Preferred  Stock  in  cash,  the  Corporation  fails to
authorize, declare and pay in cash on a Dividend Payment Date the full amount of
the cash  dividend  due at the Cash  Dividend  Rate,  then,  on or prior to such
Dividend Payment Date, the Board shall authorize, declare and pay a supplemental
stock  dividend in shares of Series B  Cumulative  Convertible  Preferred  Stock
(valued at the  Liquidation  Preference)  equal to the  difference  between  the
dividend  that  would  have been  paid  in-kind  at the  In-Kind  Dividend  Rate
(assuming  that the Board had elected to pay dividends  for such period  in-kind
and assuming  that a Special  Default  existed) and the cash  dividend  actually
declared and paid on such  Dividend  Payment  Date and on the previous  Dividend
Payment Date during such Annual Payment Period, if any.

                           (ii)     On or after December 15, 1999:

                                    (1) On or prior to December  15, 1999 and on
or prior to each June 15 and  December  15  thereafter,  the Board of  Directors
shall  determine  whether  dividend  payments  accruing on the next two Dividend
Payment  Dates  beginning  on such  Dividend  Payment  Date (each a  "Semiannual
Payment Period") shall be paid in (i) cash or (ii) additional shares of Series B
Cumulative Convertible Preferred Stock valued at the Liquidation Preference (but
not in any  combination  of cash and  additional  shares of Series B  Cumulative
Convertible Preferred Stock);

                                    (2) in the event that,  during a  Semiannual
Payment  Period  when the Board has  elected  to pay  dividends  on the Series B
Cumulative  Convertible  Preferred  Stock  in  cash,  the  Corporation  fails to
authorize, declare and pay in cash on a Dividend Payment Date the full amount of
the cash dividend due at the Cash Dividend Rate, then, on such


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Dividend Payment Date, the Board shall authorize, declare and pay a supplemental
stock  dividend in shares of Series B  Cumulative  Convertible  Preferred  Stock
(valued at the  Liquidation  Preference)  equal to the  difference  between  the
dividend  that  would  have been  paid  in-kind  at the  In-Kind  Dividend  Rate
(assuming  that the Board had elected to pay dividends  for such period  in-kind
and assuming  that a Special  Default  existed) and the cash  dividend  actually
declared and paid on such  Dividend  Payment  Date and on the previous  Dividend
Payment Date during such Semiannual Payment Period, if any.

                           (iii) All shares of Series B  Cumulative  Convertible
Preferred  Stock  issued as a dividend  with  respect to the Series B Cumulative
Convertible Preferred Stock shall thereupon be duly authorized,  validly issued,
fully paid and nonassessable.

                  (c) In the case of shares of Series B  Cumulative  Convertible
Preferred Stock issued on the Original Issue Date, dividends shall accrue and be
cumulative  from  such  date.  In the case of  shares  of  Series  B  Cumulative
Convertible  Preferred  Stock  issued  as a  dividend  on  shares  of  Series  B
Cumulative Convertible Preferred Stock, dividends shall accrue and be cumulative
from the  dividend  payment date in respect of which such shares were (or should
have been) issued as a dividend.

                  (d) Each fractional  share of Series B Cumulative  Convertible
Preferred Stock outstanding shall be entitled to a ratably  proportionate amount
of all  dividends  accruing with respect to each  outstanding  share of Series B
Cumulative  Convertible  Preferred Stock, and all such dividends with respect to
such outstanding fractional shares shall be cumulative and shall accrue (whether
or not  declared),  and shall be payable in the same manner and at such times as
provided for above with respect to dividends on each outstanding share of Series
B Cumulative  Convertible  Preferred  Stock.  Each fractional  share of Series B
Cumulative  Convertible  Preferred Stock outstanding shall also be entitled to a
ratably  proportionate  amount of any other  distributions  made with respect to
each outstanding share of Series B Cumulative  Convertible  Preferred Stock, and
all such distributions  shall be payable in the same manner and at the same time
as distributions on each  outstanding  share of Series B Cumulative  Convertible
Preferred Stock.

                  (e) No dividends or other  distributions  shall be authorized,
declared,  paid or set apart for payment on any shares of Common  Stock or other
stock  of the  Corporation  ranking  junior  as to  dividends  to the  Series  B
Cumulative  Convertible  Preferred  Stock  (collectively,  the "Junior  Dividend
Stock") except for dividends or distributions that are not Extraordinary  Equity
Payments (defined below in Section 8(h)).


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                  (f) If at any  time any  dividend  on the  $21.25  Convertible
Exchangeable  Preferred Stock (the "$21.25  Preferred Stock") or any other stock
of the Corporation hereafter issued ranking senior as to dividends to the Series
B Cumulative Convertible Preferred Stock (collectively with the $21.25 Preferred
Stock, the "Senior  Dividend  Stock") shall be in arrears,  in whole or in part,
then (except to the extent allowed by the terms of such Senior  Dividend  Stock)
no cash dividend shall be authorized, declared, paid or set apart for payment on
the Series B Cumulative Convertible Preferred Stock unless and until all accrued
and unpaid  dividends with respect to the Senior  Dividend Stock for all payment
periods ending on or prior to the date of payment of the current dividend on the
Series B  Cumulative  Convertible  Preferred  Stock shall have been  authorized,
declared  and paid or set apart for  payment.  Dividends  payable in  additional
shares of Series B Cumulative  Convertible Preferred Stock are permitted and not
subordinated in payment to payment of dividends on the Senior Dividend Stock.

                  (g) No dividends or other  distributions  shall be authorized,
declared,  paid  or  set  apart  for  payment  on any  class  or  series  of the
Corporation's stock heretofore or hereafter issued ranking, as to dividends,  on
a parity with the Series B Cumulative  Convertible  Preferred Stock (the "Parity
Dividend  Stock") for any period unless full cumulative  dividends have been, or
contemporaneously  are, authorized,  declared and paid or set apart in trust for
such  payment on the Series B  Cumulative  Convertible  Preferred  Stock for all
dividend payment periods  terminating on or prior to the date of payment of such
full cumulative  dividends.  No full dividends (other than dividends  payable in
additional shares of Series B Cumulative  Convertible  Preferred Stock) shall be
authorized,  declared,  paid or set apart for payment on the Series B Cumulative
Convertible Preferred Stock for any period unless full cumulative dividends have
been, or contemporaneously  are, authorized,  declared and paid or set apart for
payment on the Parity Dividend Stock for all dividend periods  terminating on or
prior to the date of payment of such full  cumulative  dividends.  When  accrued
dividends are not paid in full on the Series B Cumulative  Convertible Preferred
Stock and the Parity Dividend Stock, all cash dividends authorized, declared and
paid or set apart for payment on the Series B Cumulative  Convertible  Preferred
Stock and the Parity Dividend Stock shall be authorized,  declared,  paid or set
apart for payment pro rata so that the amount of dividends authorized, declared,
paid or set apart for payment per share on the Series B  Cumulative  Convertible
Preferred  Stock and the Parity  Dividend  Stock shall in all cases bear to each
other the same ratio that accrued and unpaid dividends per share on the Series B
Cumulative  Convertible  Preferred  Stock and the Parity  Dividend Stock bear to
each other.

         4.       Liquidation Preference.


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                  (a) The  liquidation  preference  of the  Series B  Cumulative
Convertible  Preferred  Stock  shall be  $200.00  per  share  (the  "Liquidation
Preference").  Subject to the full payment of the liquidation preferences of the
$21.25  Preferred  Stock and the  shares of stock of the  Corporation  hereafter
issued  ranking  senior  as to  liquidation  rights to the  Series B  Cumulative
Convertible  Preferred Stock (the "Senior Liquidation Stock"), in the event of a
liquidation,  dissolution or winding up of the Corporation, whether voluntary or
involuntary,  the holders of shares of Series B Cumulative Convertible Preferred
Stock shall be entitled to receive out of the assets of the Corporation, whether
such assets are stated capital or surplus of any nature,  an amount equal to the
dividends accrued and unpaid on such shares on the date of final distribution to
such holders, whether or not declared, without interest, plus a sum equal to the
Liquidation  Preference,  and no more,  before any payment  shall be made or any
assets  distributed  to the holders of shares of Common Stock or any other class
or series of the  Corporation's  stock  hereafter  issued  ranking  junior as to
liquidation  rights  to the  Series B  Cumulative  Convertible  Preferred  Stock
(collectively, the "Junior Liquidation Stock").

                  (b) The assets of the Corporation  available for  distribution
after the liquidation  preferences of the Senior Liquidation Stock are fully met
shall be  distributed  ratably  among the  holders  of the  Series B  Cumulative
Convertible  Preferred Stock and any other class or series of the  Corporation's
stock  hereafter  issued ranking on a parity as to  liquidation  rights with the
Series B Cumulative  Convertible Preferred Stock in proportion to the respective
preferential  amounts to which each is entitled  (but only to the extent of such
preferential  amounts);  provided,  however,  that after  payment in full of the
Liquidation  Preferences,  the holders of the shares of the Series B  Cumulative
Convertible  Preferred Stock shall not be entitled to any further  participation
in any  distribution of assets by the  Corporation.  Neither a consolidation  or
merger of the Corporation  with or into another  corporation nor a merger of any
other corporation with or into the Corporation, nor a sale or transfer of all or
any part of the  Corporation's  assets for cash,  securities or other  property,
will be considered a liquidation, dissolution or winding up of the Corporation.

         5. Limitation on Share Repurchase.  If at any time any dividends on the
Series B  Cumulative  Convertible  Preferred  Stock  shall be in  arrears or the
Corporation  shall  have  failed  to make any  purchase  of  shares  of Series B
Cumulative Convertible Preferred Stock tendered to it pursuant to Section 7, the
Corporation  shall  not -- and  the  Corporation  shall  not  permit  any  other
corporation or legal entity directly or indirectly controlled by the Corporation
(collectively, the "subsidiaries") to -- repurchase, redeem, retire or otherwise
acquire any shares of Junior Dividend Stock,  Junior  Liquidation  Stock, or any
warrants,  rights,  calls or options  exercisable  for or  convertible  into any
shares  of  Junior  Dividend  Stock  or  Junior  Liquidation  Stock,  except  by
conversion

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into or exchange for shares of Junior Dividend Stock or Junior Liquidation Stock
and other than purchases, redemptions, retirements or acquisitions made pursuant
to and as required by the terms of any employee incentive or benefit plan of the
Corporation or any  subsidiary of the  Corporation in effect on July 24, 1996 or
as  amended  or  adopted  by the  Corporation  with  approval  of the  Executive
Committee  of the  Corporation.  Notwithstanding  the  preceding  sentence,  any
subsidiary  which is wholly owned by the  Corporation  may  repurchase,  redeem,
retire or otherwise acquire shares of its stock.

         6. Redemption at Option of the Corporation.

                  (a) So long as shares of Common Stock shall have traded on the
Primary  Exchange  (defined below) (i) for at least forty (40) of the forty-five
(45)  trading  days  (each of which  trading  days  shall  be  after  the  third
anniversary  of the Original Issue Date (the "Third  Anniversary"))  immediately
preceding the  Determination  Date (defined below),  and (ii) on each of the ten
(10)  consecutive  trading  days  immediately  prior to the  Determination  Date
(defined  below),  at a Closing Price (as hereinafter  defined) in excess of the
Hurdle Percentage (defined below) of the conversion price then in effect for the
Series B Cumulative  Convertible Preferred Stock for each such trading day, all,
but not less than all, of Series B Cumulative  Convertible  Preferred  Stock may
thereafter  be redeemed at the  election of the Board of  Directors  made on any
date (the  "Determination  Date") on or after  the  Third  Anniversary,  for the
Redemption  Price (defined below in Section 7(b)),  plus an amount in cash equal
to accrued and unpaid dividends thereon,  whether or not authorized or declared,
to  but  excluding  the  date  fixed  for   redemption.   For  purposes  of  the
determination of the Board called for in the preceding sentence,  the Designated
Directors  (defined  below in Section 13) shall not vote. The date on which such
shares shall be redeemed  shall be a date that is at least ten (10), but no more
than thirty (30),  business  days after the  Determination  Date  (during  which
period the holders of the Series B Cumulative  Convertible  Preferred Stock may,
but shall not be required to, convert such stock into Common Stock).  The Hurdle
Percentage shall be 150% from and after the Third Anniversary,  and to the fifth
anniversary of the Original Issue Date; thereafter,  the Hurdle Percentage shall
be 125%. "Primary Exchange" shall mean the American Stock Exchange or such other
principal national  securities  exchange or quotation system on which the Common
Stock of the Corporation is quoted or listed or admitted to trading.

                  (b) Not more than thirty (30) nor less than ten (10)  business
days  prior  to the  redemption  date  fixed  by the  Board  of  Directors,  the
Corporation  shall give  notice by hand or  overnight  courier to the holders of
record of shares of the Series B Cumulative  Convertible  Preferred  Stock to be
redeemed,  addressed to such  holders at their last  addresses as shown upon the
stock transfer books of the  Corporation.  Each such notice of redemption  shall
specify the date fixed for redemption; the Redemption Price (defined below in

                                        7


Section  7(b))  plus an amount in cash equal to  accrued  and  unpaid  dividends
thereon,  whether or not authorized or declared, to but excluding the date fixed
for redemption;  the place or places of payment;  that payment will be made upon
presentation  and  surrender  of the shares of Series B  Cumulative  Convertible
Preferred  Stock;  that on and after the redemption date dividends will cease to
accrue on such shares;  the then effective  conversion price pursuant to Section
8; and that the right of  holders  to  convert  shares  of  Series B  Cumulative
Convertible  Preferred  Stock  shall  terminate  at the close of business on the
business day prior to the redemption  date (unless the  Corporation  defaults in
the payment of the Redemption  Price plus an amount in cash equal to accrued and
unpaid  dividends  thereon,  whether  or  not  authorized  or  declared,  to but
excluding the date fixed for redemption).

                  (c) Any notice as herein  provided shall be deemed to be given
when delivered to the address  specified in the preceding  section.  On or after
the date  fixed for  redemption  as stated in such  notice,  each  holder of the
shares called for  redemption,  unless such holder has  exercised  such holder's
right to convert shares of Series B Cumulative  Convertible  Preferred  Stock as
provided above, shall surrender the certificate  representing such shares to the
Corporation  at the place  designated  in such  notice  and shall  thereupon  be
entitled to receive  payment of the  Redemption  Price (defined below in Section
7(b))  plus an amount in cash equal to accrued  and  unpaid  dividends  thereon,
whether or not  authorized  or  declared,  to but  excluding  the date fixed for
redemption.  If less  than all the  shares  evidenced  by any  such  surrendered
certificate are redeemed,  a new certificate  shall be issued  representing  the
unredeemed shares. Notice having been given as aforesaid,  if, on the date fixed
for redemption,  funds necessary for the redemption shall be available  therefor
and shall have been irrevocably  deposited or set aside in trust for the holders
of the  shares  of  Series  B  Cumulative  Convertible  Preferred  Stock,  then,
notwithstanding  that the  certificates  representing  any  shares so called for
redemption shall not have been surrendered, dividends with respect to the shares
so called shall cease to accrue after the date fixed for redemption, such shares
shall no longer be deemed  outstanding,  the holders  thereof  shall cease to be
stockholders of the  Corporation  and all rights  whatsoever with respect to the
shares so called for redemption  (except the right of the holders to receive the
Redemption  Price plus an amount in cash equal to accrued  and unpaid  dividends
thereon,  whether or not authorized or declared, to but excluding the date fixed
for redemption,  without interest upon surrender of their certificates therefor)
shall terminate.  If funds legally available for such purpose are not sufficient
for redemption of the shares of Series B Cumulative  Convertible Preferred Stock
to be redeemed,  then the certificates  representing such shares shall be deemed
not to be  surrendered,  such shares shall remain  outstanding and the rights of
holders of shares of Series B Cumulative  Convertible Preferred Stock thereafter
shall continue to be only those of a holder of shares of the Series B Cumulative
Convertible Preferred Stock.


                                        8


                  (d)  Except as  provided  in Section 7, the shares of Series B
Cumulative  Convertible Preferred Stock shall not be subject to the operation of
any mandatory purchase, retirement or sinking fund.

         7. Mandatory Repurchase and Repurchase at Option of the Holder.


                  (a) On the eighth  anniversary of the Original Issue Date, the
Corporation  shall  purchase  from each holder of shares of Series B  Cumulative
Convertible  Preferred  Stock  one-third of the number of shares of the Series B
Cumulative  Convertible  Preferred  Shares  held by such  holder on such  eighth
anniversary.   On  the  ninth  anniversary  of  the  Original  Issue  Date,  the
Corporation  shall  purchase  from each holder of shares of Series B  Cumulative
Convertible  Preferred  Stock  one-half  of the number of shares of the Series B
Cumulative  Convertible  Preferred  Shares  held by such  holder  on such  ninth
anniversary.   On  the  tenth  anniversary  of  the  Original  Issue  Date,  the
Corporation  shall  purchase  from each holder of shares of Series B  Cumulative
Convertible  Preferred  Stock the  number of shares of the  Series B  Cumulative
Convertible  Preferred  Shares  held by such  holder on such tenth  anniversary.
Repurchases  made  pursuant  to this  Section  7(a)  shall be  effected  on such
anniversary date (or such other day as the holder and the Corporation may agree)
and shall be for the  Redemption  Price  (defined below in Section 7(b)) plus an
amount in cash equal to the accrued and unpaid dividends thereon, whether or not
authorized  or declared,  to but excluding  the date fixed for  repurchase.  Any
shares of Series B  Cumulative  Convertible  Preferred  Stock  which  would have
accrued  but have not been paid on any shares  tendered  for  purchase  shall be
deemed to be tendered for purchase.

                  (b) (i) If one or more  Special  Defaults  shall  occur at any
time or from time to time on or after the  Original  Issue Date,  each holder of
shares of the Series B  Cumulative  Convertible  Preferred  Stock shall have the
right, at such holder's option exercisable at any time within 120 days after the
happening of each such Special  Default,  to require the Corporation to purchase
all or any part of the shares of Series B Cumulative Convertible Preferred Stock
then  held by such  holder as such  holder  may  elect at the  Redemption  Price
(defined  below) plus,  in each case, an amount in cash equal to the accrued and
unpaid  dividends  thereon,  whether  or  not  authorized  or  declared,  to but
excluding  the date  fixed for  redemption.  Any  shares of Series B  Cumulative
Convertible  Preferred  Stock which would have accrued but have not been paid on
any shares  tendered for purchase  shall be deemed to be tendered for  purchase.
The "Redemption Price" shall be the Liquidation Preference where there have been
no Special Defaults, and -- after there has been one or more Special Defaults --
shall be 130% of the greater of the  Liquidation  Preference or the market value
of the  Common  Stock  (valued  at the  average  of the  Closing  Prices  on the
preceding  twenty (20) trading days  immediately  prior to the occurrence of the
Special Default) into which the

                                        9


Series B  Cumulative  Convertible  Preferred  Stock  would  then be  convertible
assuming such shares to be immediately  convertible  (whether or not such shares
were then actually convertible);

                           (ii)  A  "Special  Default"  shall  mean  any  of the
following  events  which occur after the  Original  Issuance  Date and while any
shares of the Series B Cumulative Convertible Preferred Stock are outstanding:

                                    (1) the  disbanding or other  restructuring,
reorganization,  or reconstitution  (including  without limitation change in the
number of members) of the  Executive  Committee  of the Board  without the prior
written  approval of a majority of the members of the  Executive  Committee  who
were members prior to such change (and, for so long as the holders of the Series
B Cumulative  Convertible Preferred Stock shall have the right to designate more
than one director to the  Executive  Committee  pursuant to Section 13(b) below,
including  the members so  designated  by the holders of the Series B Cumulative
Convertible Preferred Stock);

                                    (2)  the  taking  of any  of  the  following
actions by the  Corporation  or the Board  without the approval of a majority of
the members of the Executive  Committee of the Board (whether or not such action
was  taken by the Board in view of its  fiduciary  duties  pursuant  to the last
sentence of Section 3.3(A) of the By-Laws of the Corporation,  as amended):  (A)
any borrowing or guarantee by the Corporation  exceeding $15 million, (B) except
for issuance of stock or stock options pursuant to the  Corporation's  incentive
compensation  plans or  programs,  any  issuance  of stock  (whether  common  or
preferred,  whether voting or non-voting,  whether junior, pari passu, or senior
to the Series B Cumulative  Convertible Preferred Stock) other than Common Stock
of the Corporation in an aggregate amount not exceeding five percent (5%) of the
Common Stock of the  Corporation  issued and  outstanding  on the Original Issue
Date,  (C) any strategic  alliance  (other than a  construction  joint  venture)
involving a capital commitment by the Corporation  exceeding $5 million, (D) any
asset sale by the  Corporation  or lease as lessor  exceeding $5 million  (other
than  equipment  dispositions  in  the  normal  course  of  business);  (E)  any
redemption or amendment of the Rights  (defined below) or the preferred stock of
the Corporation  issuable upon the exercise of such Rights,  or any amendment of
the Rights Agreement  (defined below),  and (F) any termination of (other than a
termination upon expiration) or amendment to the management  agreement among the
Corporation, Ronald Tutor and Tutor- Saliba Corporation; provided, however, that
for purposes of this Section  8(b)(ii)(2),  approval of the Executive  Committee
shall not be required  for any  decision by the Board of Directors to redeem the
Series B Cumulative Convertible Preferred Stock pursuant to Section 6(a);

                                    (3) any  change  by the  Corporation  in the
composition of the Executive Committee of the Board which results in


                                       10


members of such  Committee  selected by the  holders of the Series B  Cumulative
Convertible Preferred Stock pursuant to Section 13(b) below being fewer than the
number of  directors  that the  holders of the Series B  Cumulative  Convertible
Preferred Stock are then entitled to designate pursuant to that provision or the
failure of the  Corporation  to nominate for director the persons  designated by
the holders of the Series B Cumulative Convertible Preferred Stock in accordance
with Section 13(a) below; or

                                    (4)  solely  for  purposes  of the  right to
elect additional  directors pursuant to Section 9(b) and not for purposes of any
other Section,  the failure of the  Corporation to authorize,  declare,  and pay
dividends payable in Series B Cumulative Convertible Preferred Stock when due in
accordance with Section 3.

                  (c) The date fixed for each such  repurchase  shall be (x) the
anniversary of the Original Issue Date  immediately  succeeding the notice given
pursuant to Section 7(a),  or (y) the 121st day following the  occurrence of the
Special Default giving rise to a repurchase  pursuant to Section 7(b). The place
of  payment  shall be at an  office or agency  in  Boston,  Massachusetts  fixed
therefor by the Corporation or, if not fixed, at the principal  executive office
of the Corporation.

                  (d) The Corporation shall, within 20 days of the occurrence of
a Special  Default,  give a written  notice  thereof by  registered or certified
mail,  postage prepaid,  return receipt  requested,  to the holders of record of
shares of the Series B Cumulative Convertible Preferred Stock, addressed to such
holders at their last  addresses as shown upon the stock  transfer  books of the
Corporation.  Each such  notice  shall  specify the  Special  Default  which has
occurred and the date of such  occurrence,  the place or places of payment,  the
then  effective  conversion  price  pursuant  to Section  8, the then  effective
repurchase  price  and the  date  the  right  of such  holder  to  require  such
repurchase shall  terminate.  Any notice that is mailed as herein provided shall
be conclusively  presumed to have been duly given,  whether or not the holder of
shares of Series B Cumulative  Convertible Preferred Stock receives such notice;
and failure to give such notice by mail,  or any defect in such  notice,  to the
holders of any shares shall not affect the validity of the  proceedings  for the
repurchase  of any other  shares of Series B  Cumulative  Convertible  Preferred
Stock.

                  (e) (i) On the date fixed for any such repurchase, each holder
of shares of Series B Cumulative  Convertible Preferred Stock who elects to have
shares of Series B Cumulative  Convertible  Preferred Stock held by it purchased
shall surrender the certificate  representing  such shares to the Corporation at
the place  designated  in such  notice  together  with an  election to have such
purchase  made and shall  thereupon  be  entitled  to receive  payment  therefor
provided in this Section 7. If less than all the shares represented by


                                       11


any such  surrendered  certificate are repurchased,  a new certificate  shall be
issued representing the unpurchased shares. Dividends with respect to the shares
of Series B Cumulative  Convertible  Preferred Stock so purchased shall cease to
accrue  after  the date so  purchased,  such  shares  shall no  longer be deemed
outstanding  after  such  date  and  the  holders  thereof  shall  cease  to  be
stockholders of the  Corporation  and all rights  whatsoever with respect to the
shares so purchased shall terminate.

                           (ii) If the funds legally available for such purchase
are not sufficient to purchase all the shares of Series B Cumulative Convertible
Preferred Stock tendered to the Corporation for purchase,  the Corporation shall
purchase  the  greatest  number  of whole  shares  for which  such  funds are so
available on a pro rata basis among all tendering  holders based on the ratio of
the number of shares  tendered  by each of them to the  aggregate  amount of all
shares so tendered,  and the certificates  representing  the unpurchased  shares
shall be deemed not to be surrendered for repurchase,  such  unpurchased  shares
shall  remain  outstanding  and the rights of the  holders of shares of Series B
Cumulative  Convertible Preferred Stock thereafter shall continue to be those of
a holder of shares  of the  Series B  Cumulative  Convertible  Preferred  Stock;
provided,  however,  the Corporation  shall thereafter be required to repurchase
all such  remaining  shares at the first date it has  sufficient  funds  legally
available  for such  purpose  at the  price it would  have paid at the date such
shares were actually tendered and the Corporation shall give notice as aforesaid
to each holder whose shares were not repurchased for such reason and such holder
shall thereafter have the right to elect to have such shares  repurchased,  such
election to be made within 30 days of receipt of such  notice.  For  purposes of
this  Section,  the  Corporation  shall be deemed not to have  sufficient  funds
legally  available  for any such  purchase if the Board of Directors  reasonably
determines  that  immediately  after such  repurchase the  Corporation  would be
insolvent.

                           (iii) For so long as there remain  shares of Series B
Cumulative Convertible Preferred Stock that have been surrendered for repurchase
in  accordance  with this  Section 7 that  have not been so  repurchased  by the
Corporation:  (1) the  number  of  members  of the Board of  Directors  shall be
increased by such number as is necessary to allow the election of the  directors
specified  in clause (2) of this  Section,  and (2) the  holders of the Series B
Cumulative Convertible Preferred Stock, voting separately as a class, shall have
the right to elect an  additional  number of directors to the Board of Directors
such that the Designated Directors (defined below in Section 13) who are serving
on the Board of Directors,  plus the directors elected by such holders voting as
a class under this  clause,  constitute  a majority  of Board.  The right of the
holders of the Series B Cumulative  Convertible Preferred Stock to vote for such
additional  directors  shall  terminate  when shares of the Series B  Cumulative
Convertible  Preferred Stock properly  tendered for repurchase  pursuant to this
Section 7 have been repurchased. The term of


                                       12



office  of all  directors  so  elected  shall  terminate  immediately  upon  the
termination  of the right of the holders of the Series B Cumulative  Convertible
Preferred  Stock  to vote for  such  additional  directors,  and the  number  of
directors of the Board of Directors shall immediately thereafter be reduced.

                           (iv) The foregoing right of the holders of the Series
B  Cumulative  Convertible  Preferred  Stock  with  respect to the  election  of
additional  directors may be exercised at each annual meeting of stockholders or
at any special  meeting of stockholders  held for such purpose.  If the right to
elect  additional  directors  shall have  accrued to the holders of the Series B
Cumulative  Convertible Preferred Stock more than thirty (30) days preceding the
date established for the next annual meeting of  stockholders,  the President of
the  Corporation  shall,  within  five  (5)  days  after  the  delivery  to  the
Corporation at its principal  office of a written  request for a special meeting
signed by the holders of at least 10% of all outstanding  shares of the Series B
Cumulative Convertible Preferred Stock, call a special meeting of the holders of
the Series B Cumulative  Convertible  Preferred  Stock to be held as promptly as
practicable  after the delivery of such request for the purpose of electing such
additional directors.

                           (v)  The   holders   of  the   Series  B   Cumulative
Convertible  Preferred  Stock  voting as a class  shall have the right to remove
with or without cause at any time and replace any  directors  such holders shall
have  elected  pursuant to this Section 7 and the holders of each other class of
stock of the Corporation shall not have the right to remove any such directors.

         8.       Conversion.

                  (a) Right of  Conversion.  Each  share of Series B  Cumulative
Convertible  Preferred Stock, whether issued originally or in-kind as a dividend
payment,  shall be convertible at the option of the holder thereof,  at any time
(provided, however, that where the Corporation has elected to redeem such stock,
the option of the holder  described in this  section must be exercised  prior to
the close of business on the business day prior to the date fixed for redemption
of such share as herein provided),  into fully paid and nonassessable  shares of
Common Stock and such other securities and property as hereinafter  provided, at
the rate of that number of shares of Common  Stock for each full share of Series
B  Cumulative  Convertible  Preferred  Stock  that is equal  to the  Liquidation
Preference  plus an amount in cash equal to the  accrued  and  unpaid  dividends
thereon, whether or not authorized or declared,  divided by the conversion price
applicable  per share of Common Stock.  For purposes of this Section  8(a),  the
"conversion price" applicable per share of Common Stock shall initially be equal
to Nine Dollars and Sixty-Eight and Two-Hundred Nineteen  One-Thousandths  Cents
($9.68219),   and  shall  be   adjusted   from  time  to  time  to  the  nearest
one-thousandth  of a cent after the Original  Issue Date in accordance  with the
provisions of this Section 8.


                                       13



                  (b)      Conversion Procedures.

                           (i) Any  holder  of  shares  of  Series B  Cumulative
Convertible  Preferred  Stock  desiring to convert such shares into Common Stock
shall  surrender the  certificate or  certificates  representing  such shares of
Series B Cumulative  Convertible  Preferred  Stock at the office of the transfer
agent for the Series B Cumulative Convertible Preferred Stock, which certificate
or certificates,  if the Corporation shall so require, shall be duly endorsed to
the Corporation or in blank, or accompanied by proper instruments of transfer to
the  Corporation or in blank,  accompanied by irrevocable  written notice to the
Corporation  that the  holder  elects  so to  convert  such  shares  of Series B
Cumulative  Convertible  Preferred  Stock and specifying the name or names (with
address or addresses) in which a certificate or certificates  evidencing  shares
of Common Stock are to be issued.

                           (ii) Subject to Section  8(k) hereof,  no payments or
adjustments in respect of dividends on shares of Series B Cumulative Convertible
Preferred Stock  surrendered for conversion or on account of any dividend on the
Common Stock issued upon  conversion  shall be made upon the  conversion  of any
shares of Series B Cumulative Convertible Preferred Stock.

                           (iii) The  Corporation  shall, as soon as practicable
after such deposit of  certificates  representing  shares of Series B Cumulative
Convertible  Preferred  Stock  accompanied  by the written notice and compliance
with any  other  conditions  herein  contained,  deliver  at such  office of the
transfer  agent  to the  person  for  whose  account  such  shares  of  Series B
Cumulative  Convertible Preferred Stock were so surrendered or to the nominee or
nominees of such person  certificates  representing the number of full shares of
Common Stock to which such person shall be entitled as aforesaid,  together with
a cash  adjustment  in respect  of any  fraction  of a share of Common  Stock as
hereinafter  provided.  Subject to the following  provisions of this  paragraph,
such  conversion  shall  be  deemed  to have  been  made as of the  date of such
surrender of the shares of Series B Cumulative Convertible Preferred Stock to be
converted,  and the  person or persons  entitled  to  receive  the Common  Stock
deliverable  upon conversion of such Series B Cumulative  Convertible  Preferred
Stock shall be treated for all purposes as the record  holder or holders of such
Common Stock on such date.

                  (c) Adjustment of Conversion  Price.  The conversion  price at
which a share of Series B Cumulative  Convertible Preferred Stock is convertible
into Common Stock shall be subject to adjustment from time to time as follows:

                           (i) (1) In case the  Corporation  shall pay or make a
dividend or other distribution on its Common Stock exclusively in Common


                                       14


Stock or shall pay or make a dividend or other  distribution  on any other class
of stock of the Corporation which dividend or distribution includes Common Stock
or shall  exchange  outstanding  Rights (as defined in Section  8(j) hereof) for
shares of Common  Stock,  the  conversion  price in  effect  at the  opening  of
business  on  the  day  following  the  date  fixed  for  the  determination  of
stockholders  entitled  to receive  such  dividend or other  distribution  or to
exchange such Rights shall be reduced by multiplying  such conversion price by a
fraction of which the  numerator  shall be the number of shares of Common  Stock
outstanding  at the close of business  on the date fixed for such  determination
and the  denominator  shall be the sum of such  number of  shares  and the total
number of shares  constituting such dividend or other  distribution or exchange,
such reduction to become effective  immediately after the opening of business on
the day following the date fixed for such determination.

                                    (2) In case the  Corporation  shall issue or
otherwise  sell or  distribute  shares of Common Stock for a  consideration  per
share in cash or property  less than the most recent  Closing Price prior to the
time of such issuance (and, if shares are issued,  sold, or distributed pursuant
to the exercise or conversion of options,  warrants,  convertible securities, or
other  rights,  the exercise or  conversion  price  thereof  when such  options,
warrants, convertible securities, or rights were granted or issued was less than
the Closing Price (defined below in Section 8(h) at the time of issuance of such
options,  warrants,  convertible  securities,  or other rights),  the conversion
price then in effect shall be reduced by multiplying  such conversion price by a
fraction of which the  numerator  shall be the number of shares of Common  Stock
outstanding  immediately  prior to such issuance,  sale or distribution plus the
number of shares of Common Stock which the aggregate  consideration  received by
the Corporation for such issuance, sale or distribution (such consideration,  if
other than cash, as determined  by the Board of Directors,  whose  determination
shall be conclusive  and  described in a vote of the Board of  Directors)  would
purchase at the current market price per share and the denominator  shall be the
number of shares of Common Stock outstanding  immediately after giving effecting
to such issuance, sale or distribution.

                           (ii)  In case  the  Corporation  shall  pay or make a
dividend or other distribution on its Common Stock consisting exclusively of, or
shall otherwise issue to all or  substantially  all holders of its Common Stock,
rights or warrants  entitling  the holders  thereof to subscribe for or purchase
shares of Common  Stock at a price per share less than the then  current  market
price per share  (determined as provided in  subparagraph  (vii) of this Section
8(c))  of  the  Common  Stock  on  the  date  fixed  for  the  determination  of
stockholders  entitled to receive such rights or warrants,  the conversion price
in effect at the  opening of business  on the day  following  the date fixed for
such  determination  shall be reduced by multiplying  such conversion price by a
fraction of which the  numerator  shall be the number of shares of Common  Stock
outstanding at the close of business on the date fixed for such


                                       15


determination  plus the number of shares of Common Stock which the  aggregate of
the offering  price of the total number of shares of Common Stock so offered for
subscription  or purchase  would  purchase at such current  market price and the
denominator  shall be the number of shares of Common  Stock  outstanding  at the
close of  business on the date fixed for such  determination  plus the number of
shares of Common Stock so offered for  subscription or purchase,  such reduction
to  become  effective  immediately  after the  opening  of  business  on the day
following the date fixed for such determination.  In case any rights or warrants
referred to in this  subparagraph  (ii) in respect of which an adjustment  shall
have  been  made  shall  expire  unexercised,  the  conversion  price  shall  be
readjusted  at the time of such  expiration to the  conversion  price that would
have  been  in  effect  if no  adjustment  had  been  made  on  account  of  the
distribution or issuance of such expired rights or warrants. For the purposes of
this Section 8(c)(ii), if both a Distribution Date and a Section 11(a)(ii) Event
(as  such  terms  are  defined  in  the  Rights  Agreement  by and  between  the
Corporation  and the First  National  Bank at Boston,  dated as of September 23,
1988, as amended (the "Rights  Agreement")) shall have occurred,  then the later
to occur of such events shall be deemed to  constitute  an issuance of rights to
purchase shares of Common Stock.

                           (iii) In case  outstanding  shares  of  Common  Stock
shall be  subdivided  into a greater  number of  shares  of  Common  Stock,  the
conversion  price in effect at the opening of business on the day  following the
day upon which  such  subdivision  becomes  effective  shall be  proportionately
reduced,  and conversely,  in case outstanding shares of Common Stock shall each
be combined  into a smaller  number of shares of Common  Stock,  the  conversion
price in effect at the  opening of business  on the day  following  the day upon
which such combination  becomes  effective shall be  proportionately  increased,
such reduction or increase,  as the case may be, to become effective immediately
after the  opening  of  business  on the day  following  the day upon which such
subdivision or combination becomes effective.

                           (iv) (1) In case the  Corporation  shall, by dividend
or otherwise,  make a Section  8(c)(iv)  Distribution  (defined below in Section
8(h)) to all or  substantially  all holders of its Common Stock,  the conversion
price  shall be  reduced so that the same shall  equal the price  determined  by
multiplying the conversion  price in effect  immediately  following the close of
business on the Determination Date (as defined in Section 8(h)) by a fraction of
which the numerator  shall be the current market price per share  (determined as
provided in subparagraph  (vii) of this Section 8(c)) of the Common Stock on the
Determination  Date less the fair market  value (as  determined  by the Board of
Directors, whose determination shall be conclusive and described in a resolution
of the Board of Directors), on the date of such effectiveness, of the portion of
the Section  8(c)(iv)  Distribution  so  distributed  applicable to one share of
Common Stock and the denominator shall be such current market price per share of
the Common Stock, such reduction to become effective


                                       16


immediately  prior  to  the  opening  of  business  on  the  day  following  the
Determination  Date.  If the Board of Directors so  determines  as aforesaid the
fair market value of any distribution for purposes of this  subparagraph (iv) by
reference  to the  actual  or  when-issued  trading  market  for any  securities
comprising  such  distribution,  it must in doing so consider the prices in such
market over the same period used in computing the current market price per share
of Common Stock pursuant to subparagraph (vii) of this Section 8(c).

                                    (2)  Notwithstanding  the foregoing,  if the
Corporation  elects to reserve,  for distribution to the holders of the Series B
Cumulative  Convertible  Preferred  Stock upon the  conversion  of the shares of
Series  B  Cumulative   Convertible   Preferred  Stock,  the  evidences  of  the
Corporation's  indebtedness,  shares of any class of stock, or assets that would
have been  distributed  to the  holders of the Series B  Cumulative  Convertible
Preferred  Stock if they had converted  their shares into shares of Common Stock
so that any such holder  converting  shares of Series B  Cumulative  Convertible
Preferred Stock will receive upon such conversion,  in addition to the shares of
the Common Stock to which such holder is  entitled,  the amount and kind of such
evidences of the  Corporation's  indebtedness,  shares of any class of stock, or
assets  which such holder  would have  received if such holder had,  immediately
prior to the Determination  Date for such distribution of securities,  converted
its shares of Series B Cumulative Convertible Preferred Stock into Common Stock,
the fair market value of the securities shall, for purposes of this subparagraph
(iv), be deemed to be zero.

                           (v) Subject to the last sentence of this subparagraph
(v),  in case the  Corporation  shall,  by dividend  or  otherwise,  at any time
distribute  to  all  holders  of its  Common  Stock  cash  (excluding  any  cash
representing  an amount per share of  capital  stock of the  Corporation  to the
extent such cash does not  constitute  an  Extraordinary  Equity  Payment),  the
conversion  price  shall be  reduced  so that the same  shall  equal  the  price
determined by multiplying the conversion  price in effect  immediately  prior to
the  effectiveness  of the  conversion  price  reduction  contemplated  by  this
subparagraph  (v) by a  fraction  of which the  numerator  shall be the  current
market price per share  (determined  as provided in  subparagraph  (vii) of this
Section 8(c)) of the Common Stock on the  Determination  Date less the amount of
cash so distributed  and not excluded as above provided  applicable to one share
of Common Stock and the denominator shall be such current market price per share
of the Common Stock, such reduction to become effective immediately prior to the
opening of business on the day following the Determination Date. Notwithstanding
the foregoing,  if the Corporation  elects to reserve the cash to be distributed
for distribution to the holders of the Series B Cumulative Convertible Preferred
Stock  upon the  conversion  of the  shares of Series B  Cumulative  Convertible
Preferred Stock so that any such holder converting shares of Series B Cumulative
Convertible  Preferred Stock will receive upon such  conversion,  in addition to
the shares of the Common Stock


                                       17



to which such holder is  entitled,  the amount of cash which such  holder  would
have received if such holder had,  immediately prior to the  Determination  Date
for such  distribution  of cash,  converted  its  shares of Series B  Cumulative
Convertible  Preferred Stock into Common Stock,  then the conversion price shall
not be so reduced.

                           (vi) In case a tender or  exchange  offer made by the
Corporation or any subsidiary of the  Corporation  for all or any portion of the
Corporation's  Common Stock shall expire and such tender or exchange offer shall
involve the payment by the Corporation or such subsidiary of  consideration  per
share of Common Stock having a fair market value (as  determined by the Board of
Directors, whose determination shall be conclusive and described in a resolution
of the Board of Directors) at the last time (the  "Expiration  Time") tenders or
exchanges  may be made  pursuant to such  tender or exchange  offer (as it shall
have been amended) that exceeds the current  market price per share  (determined
as provided in  subparagraph  (vii) of this Section 8(c)) of the Common Stock on
the Trading Day next succeeding the Expiration  Time, the conversion price shall
be reduced so that the same shall equal the price  determined by multiplying the
conversion  price  in  effect  immediately  prior  to the  Expiration  Time by a
fraction of which the  numerator  shall be the number of shares of Common  Stock
outstanding  (including any tendered or exchanged shares) on the Expiration Time
multiplied  by the current  market  price per share  (determined  as provided in
subparagraph  (vii) of this Section 8(c)) of the Common Stock on the Trading Day
next succeeding the Expiration Time and the denominator  shall be the sum of (x)
the fair market value  (determined as aforesaid) of the aggregate  consideration
payable to stockholders  based on the acceptance (up to any maximum specified in
the terms of the tender or  exchange  offer) of all shares  validly  tendered or
exchanged  and not  withdrawn as of the  Expiration  Time (the shares  deemed so
accepted,  up to any such maximum,  being referred to as the "Purchased Shares")
and (y) the product of the number of shares of Common  Stock  outstanding  (less
any Purchased  Shares) on the  Expiration  Time and the current market price per
share (determined as provided in subparagraph (vii) of this Section 8(c)) of the
Common  Stock on the Trading  Day next  succeeding  the  Expiration  Time,  such
reduction to become  effective  immediately  prior to the opening of business on
the day following the Expiration Time.

                           (vii) For  purposes  of any  computation  under  this
section, the current market price per share of Common Stock on any date shall be
deemed to be the  volume-weighted  average trading price of the Common Stock for
the five-day  period before the earlier of the day in question and the "ex" date
with  respect  to any  issuance  or  distribution  requiring  such  computation;
provided,  however,  that for  purposes  of clause  (3) of this  paragraph,  the
current market price per share shall be deemed to be the volume-weighted average
trading  price of the Common Stock for the five-day  period after the "ex date."
For purposes of this subparagraph (vii), the term


                                       18


"ex" date, (1) when used with respect to any issuance or distribution, means the
first date on which the Common Stock trades regular way on the relevant exchange
or in the relevant market from which the Closing Price was obtained  without the
right to receive such  issuance or  distribution,  (2) when used with respect to
any  subdivision or combination of shares of Common Stock,  means the first date
on which the Common Stock trades  regular way on such exchange or in such market
after the time at which such subdivision or combination  becomes effective,  and
(3) when used with respect to any tender or exchange offer, means the first date
on which the Common Stock trades  regular way on such exchange or in such market
after the Expiration Time of such offer.

                           (viii) The  Corporation  may make such  reductions in
the conversion price, in addition to those required by subparagraphs  (i), (ii),
(iii),  (iv), (v) and (vi) of this Section 8(c), as it considers to be advisable
to avoid or  diminish  any income  tax to  holders of Common  Stock or rights to
purchase  Common Stock  resulting from any dividend or distribution of stock (or
rights to  acquire  stock)  or from any event  treated  as such for  income  tax
purposes.

                           (ix) No adjustment in the  conversion  price shall be
required  unless  such  adjustment  would  require an increase or decrease of at
least 1% in the conversion price; provided,  however, that any adjustments which
by reason of this subparagraph (ix) are not required to be made shall be carried
forward and taken into account in any subsequent adjustment.

                           (x)  Notwithstanding  any  other  provision  of  this
Section 8 and without  implication that the contrary would otherwise be true, no
issuance,  dividend or distribution requiring adjustment of the conversion price
pursuant to Section  8(c) hereof  shall be deemed to have  occurred in the event
that, upon,  following or in connection with the redemption or expiration of the
Rights or the termination of the Rights Agreement or otherwise,  the Corporation
enters  into a new  agreement  that is  comparable  in purpose and effect to the
Rights Agreement (as determined by the Board of Directors,  whose  determination
shall be conclusive)  and  distributes  rights to purchase  Preferred  Stock (or
other similar stock  purchase  rights under such  agreement that are attached to
the Common Stock) to the holders of Common Stock.

                           (xi)  Whenever  the  conversion  price is adjusted as
herein provided:

                                    (1)  the   Corporation   shall  compute  the
adjusted  conversion  price  and  shall  prepare  a  certificate  signed  by the
Treasurer of the  Corporation  setting forth the adjusted  conversion  price and
showing in reasonable  detail the acts upon which such adjustment is based,  and
such certificate shall forthwith be filed with the transfer agent for the Series
B Cumulative Convertible Preferred Stock; and


                                       19


                                    (2) a notice  stating the  conversion  price
has been  adjusted  and  setting  forth  the  adjusted  conversion  price  shall
forthwith be required,  and as soon as  practicable  after it is required,  such
notice  shall be mailed by the  Corporation  to all record  holders of shares of
Series B Cumulative  Convertible Preferred Stock at their last addresses as they
shall appear upon the stock transfer books of the Corporation.

                  (d) No  Fractional  Shares.  No  fractional  shares  or  scrip
representing  fractional  shares of Common Stock shall be issued upon conversion
of Series B Cumulative Convertible Preferred Stock. If more than one certificate
representing shares of Series B Cumulative  Convertible Preferred Stock shall be
surrendered  for  conversion at one time by the same holder,  the number of full
shares  issuable upon  conversion  thereof shall be computed on the basis of the
aggregate number of shares of Series B Cumulative Convertible Preferred Stock so
surrendered.  Instead  of any  fractional  share  of  Common  Stock  that  would
otherwise  be  issuable  upon  conversion  of any shares of Series B  Cumulative
Convertible  Preferred  Stock,  the  Corporation  shall pay a cash adjustment in
respect of such  fractional  interest in an amount equal to the same fraction of
the  market  price  per share of Common  Stock  (as  determined  by the Board of
Directors or in any manner prescribed by the Board of Directors,  which, so long
as the Common  Stock is listed on the Primary  Exchange,  shall be the  reported
last sale price regular way on the Primary Exchange) at the close of business on
the day of conversion.

                  (e)  Reclassification,   Consolidation,  Merger,  or  Sale  of
Assets. If any capital  reorganization or  reclassification of the capital stock
of the  Corporation,  or consolidation or merger of the Corporation with another
corporation,  or the sale of all or  substantially  all of its assets to another
corporation  shall be effected in such a way that  holders of Common Stock shall
be entitled to receive stock, securities, cash or other property with respect to
or in exchange for Common Stock,  then,  as a condition of such  reorganization,
reclassification,  consolidation,  merger or sale, lawful and adequate provision
shall  be made  whereby  the  holders  of the  Series B  Cumulative  Convertible
Preferred  Stock shall have the right to acquire and receive upon  conversion of
the Series B Cumulative  Convertible  Preferred Stock, which right shall be pari
passu  with the rights of  holders  of Parity  Dividend  Stock and senior to the
rights of the holders of Junior Dividend Stock and Junior Liquidation Stock (but
after and subject to the rights of holders of Senior  Dividend  Stock and Senior
Liquidation  Stock,  if any),  such shares of stock,  securities,  cash or other
property issuable or payable (as part of the  reorganization,  reclassification,
consolidation, merger or sale) with respect to or in exchange for such number of
outstanding  shares of Common Stock as would have been received upon  conversion
of the Series B Cumulative  Convertible  Preferred Stock at the conversion price
then in effect,

                                       20


whether or not such stock is then  convertible.  The Corporation will not effect
any such consolidation, merger or sale, unless prior to the consummation thereof
the successor  corporation (if other than the  Corporation)  resulting from such
consolidation  or merger or the corporation  purchasing such assets shall assume
by written  instrument in reasonable  and customary  form mailed or delivered to
the holders of the Series B Cumulative  Convertible  Preferred Stock at the last
address  of each such  holder  appearing  on the books of the  Corporation,  the
obligation  to deliver to each such holder such shares of stock,  securities  or
assets as, in  accordance  with the  foregoing  provisions,  such  holder may be
entitled to purchase.

                  (f) Reservation of Shares; Transfer Taxes; Etc.

                           (i) The  Corporation  shall at all times  reserve and
keep available, out of its authorized and unissued stock, solely for the purpose
of effecting  the  conversion of the Series B Cumulative  Convertible  Preferred
Stock,  such  number of  shares of its  Common  Stock or  Common  Stock  free of
preemptive  rights  as shall  from  time to time be  sufficient  to  effect  the
conversion of all shares of Series B Cumulative Convertible Preferred Stock from
time to time outstanding. The Corporation shall from time to time, in accordance
with the laws of the State of  Massachusetts,  increase the number of authorized
shares of Common  Stock if at any time the  number of shares of  authorized  and
unissued  Common Stock shall not be sufficient  to permit the  conversion of all
the then outstanding shares of Series B Cumulative Convertible Preferred Stock.

                           (ii) If any  shares of Common  Stock  required  to be
reserved  for  purposes of  conversion  of the Series B  Cumulative  Convertible
Preferred  Stock  hereunder  require   registration  with  or  approval  of  any
governmental  authority under any Federal or State law before such shares may be
issued upon conversion,  the Corporation will in good faith and as expeditiously
as possible endeavor to cause such shares to be duly registered or approved,  as
the case may be. If the Common Stock is listed on the American Stock Exchange or
any other  national  securities  exchange or  national  quotation  service,  the
Corporation will list and keep listed on such exchange,  upon official notice of
issuance,  all shares of Common Stock issuable upon  conversion of the shares of
Series B Cumulative Convertible Preferred Stock.

                           (iii) The Corporation  shall pay any and all issue or
other taxes that may be payable in respect of any issue or delivery of shares of
Common  Stock on  conversion  of the Series B Cumulative  Convertible  Preferred
Stock. The Corporation shall not, however,  be required to pay any tax which may
be payable  in respect of any  transfer  involved  in the issue or  delivery  of
Common Stock (or other  securities or assets) in a name other than that in which
the shares of Series B Cumulative  Convertible Preferred Stock so converted were
registered, and no such issue or delivery shall be made unless


                                       21


and until the  person  requesting  such  issue has paid to the  Corporation  the
amount of such tax or has  established,  to the satisfaction of the Corporation,
that such tax has been paid.

                  (g) Prior Notice of Certain Events. In case:

                           (i) the  Corporation  shall  declare or  authorize  a
redemption or  repurchase  of in excess of five percent of the then  outstanding
shares of Common Stock; or

                           (ii) the Corporation  shall authorize the granting to
all holders of Common Stock of rights or warrants to  subscribe  for or purchase
any shares of stock of any class or of any other rights or warrants  (other than
pursuant to the Rights  Agreement or,  following the redemption or expiration of
the Rights or the  termination  of the  Rights  Agreement,  any new  shareholder
rights  agreement  that is  comparable  in  purpose  and  effect  to the  Rights
Agreement); or

                           (iii) of any  reclassification of Common Stock (other
than a subdivision or combination of the  outstanding  Common Stock, or a change
in par  value,  or from par value to no par  value,  or from no par value to par
value),  or of any  consolidation  or merger to which the Corporation is a party
and for which approval of any stockholders of the Corporation shall be required,
or of the sale or  transfer  of all or  substantially  all of the  assets of the
Corporation  or of any  compulsory  share  exchange  whereby the Common Stock is
converted into other securities, cash or other property; or

                           (iv) of the  voluntary  or  involuntary  dissolution,
liquidation or winding up of the Corporation;

then the  Corporation  shall cause to be filed with the  transfer  agent for the
Series B Cumulative Convertible Preferred Stock, and shall cause to be mailed to
the holders of record of the Series B Cumulative Convertible Preferred Stock, at
their last  addresses as they shall appear upon the stock  transfer books of the
Corporation,  at  least  fifteen  days  prior  to  the  applicable  record  date
hereinafter specified, a notice stating, as the case may be, (x) the record date
(if any) for the purpose of such dividend, distribution,  redemption, repurchase
or granting of rights or warrants  or, if no record date is to be set,  the date
as of which the  holders  of  Common  Stock of  record  to be  entitled  to such
dividend,  distribution,  redemption, rights or warrants are to be determined or
(y) the  date on  which  such  reclassification,  consolidation,  merger,  sale,
transfer, share exchange, dissolution,  liquidation or winding up is expected to
become effective,  and the date, if any, as of which it is expected that holders
of shares of Common Stock of record  shall be entitled to exchange  their shares
of  Common  Stock  for  securities  or  other  property  deliverable  upon  such
reclassification, consolidation, merger, sale, transfer, share exchange,


                                       22


dissolution,  liquidation  or winding up (but no failure to mail such  notice or
any defect  therein or in the mailing  thereof  shall affect the validity of the
corporate action required to be specified in such notice).

                  (h)  Definitions.  The  following  definitions  shall apply to
terms used in this Section 8:

                           (i) "Closing Price" on any day shall mean the closing
sale price  regular way on such day or, in case no such sale takes place on such
day,  the average of the reported  closing bid and asked prices  regular way, in
each case on the  Primary  Exchange,  or, if not quoted or listed or admitted to
trading on any national  securities exchange or quotation system, the average of
the closing  bid and asked  prices of the Common  Stock on the  over-the-counter
market on the day in  question  as reported  by the  National  Quotation  Bureau
Incorporated,  or a similarly generally accepted reporting service, or if not so
available in such manner,  as furnished by any American  Stock  Exchange  member
firm selected from time to time by the Board of Directors of the Corporation for
that purpose.

                           (ii) "Determination Date" shall mean, with respect to
any dividend, distribution or other transaction or event in which the holders of
Common Stock have the right to receive any cash, securities or other property or
assets or in which the Common Stock (or other applicable  security) is exchanged
for or converted into any combination of cash, securities or other property, the
date fixed for  determination  of  stockholders  entitled to receive  such cash,
securities or other property or assets  (whether such date is fixed by the Board
of Directors or by statute, contract or otherwise).

                           (iii) "Extraordinary Equity Payment" shall mean:

                                    (1) the  declaration  or payment on or after
the Original Issue Date by the  Corporation,  or any of its  subsidiaries of any
dividend or distribution on any class or series of its stock other than:

                                            (A)  any  dividend  or  distribution
from one  subsidiary  of the  Corporation  to a  wholly-owned  subsidiary of the
Corporation or from a subsidiary of the Corporation to the Corporation; provided
that  all of  such  dividend  paid  or  distribution  made,  net  of  applicable
withholding taxes, is received by the Corporation, or such recipient subsidiary;

                                            (B) any regularly scheduled (whether
or not overdue)  periodic cash dividend on the $21.25 Preferred Stock and Series
B Cumulative Convertible Preferred Stock in accordance with the terms thereof as
in effect on the Original Issue Date;


                                       23



                                            (C) any cash dividends on the Common
Stock or other  capital  stock  after  September  1, 2001 that do not  exceed in
aggregate more than twenty-five percent (25%) of the Corporation's  consolidated
net income  available for distribution to common  shareholders  (after preferred
dividends);  provided, however, that the Corporation shall have elected, for the
preceding four fiscal quarters, to pay cash dividends on the Series B Cumulative
Convertible  Preferred  Stock and shall have paid in full such dividends in cash
when due;

                                    (2)    any     repurchases,     redemptions,
retirements or other  acquisitions  directly or indirectly by the Corporation or
any of its  subsidiaries on or after the Original Issue Date of any stock of the
Corporation or any of its  subsidiaries  (other than a wholly-owned  subsidiary)
(other than  redemptions or  repurchases of the Series B Cumulative  Convertible
Preferred Stock in accordance with Sections 6 and 7).

                           (iv)  "Fundamental  Change" shall mean the occurrence
of any  transaction or event in connection with a plan or agreement to which, in
either case, the  Corporation is a party pursuant to which all or  substantially
all of the  shares of Common  Stock  shall be  exchanged  for,  converted  into,
acquired  for or  constitute  solely  the  right to  receive  cash,  securities,
property or other assets  (whether by means of an exchange  offer,  liquidation,
tender   offer,   consolidation,    merger,    combination,    reclassification,
recapitalization  or  otherwise);  provided,  however,  in  the  case  of a plan
involving more than one such transaction or event, for purposes of adjustment of
the conversion price,  such Fundamental  Change shall be deemed to have occurred
when substantially all of the shares of Common Stock of the Corporation shall be
exchanged for,  converted into or acquired for or constitute solely the right to
receive cash, securities,  property or other assets, but the adjustment shall be
based upon the consideration  which the holders of Common Stock received in such
transaction  or event as a result of which more than 50% of the shares of Common
Stock of the  Corporation  shall have been  exchanged  for,  converted  into, or
acquired  for or  constitute  solely  the  right to  receive  cash,  securities,
property or other assets; provided, further, that such term does not include (i)
any  such  transaction  or  event in which  the  Corporation  and/or  any of its
subsidiaries  are the  issuers of all the cash,  securities,  property  or other
assets exchanged,  acquired or otherwise issued in such transaction or event, or
(ii) any such  transaction or event in which the holders of Common Stock receive
securities of an issuer other than the  Corporation  if,  immediately  following
such transaction or event, such holders hold a majority of the securities having
the power to vote  normally in the  election of  directors  of such other issuer
outstanding immediately following such transaction or other event.

                           (v)  "Section  8(c)(iv)   Distribution"   shall  mean
evidences of the  Corporation's  indebtedness,  shares of any class of stock, or
assets,  including securities,  but excluding any rights or warrants referred to
in

                                       24



subparagraph  (ii) of Section 8(c),  excluding any dividend or distribution paid
in cash, and excluding any dividend or distribution  referred to in subparagraph
(i) of Section 8(c).

                           (vi)  "Trading  Day"  shall  mean a day on which  the
national  securities  exchange  or the NASDAQ  National  Market  System  used to
determine  the  Closing  Price is open for the  transaction  of  business or the
reporting of trades.

                  (i) Dividend or Interest  Reinvestment Plans.  Notwithstanding
the foregoing provisions, the issuance of any shares of Common Stock pursuant to
any plan  providing  for the  reinvestment  of dividends or interest  payable on
securities of the Corporation and the investment of additional  optional amounts
in shares of Common Stock under any such plan, and the issuance of any shares of
Common  Stock or options  or rights to  purchase  such  shares  pursuant  to any
employee  benefit plan or program of the  Corporation or pursuant to any option,
warrant,  right or exercisable,  exchangeable or convertible  security issued or
outstanding on the Original Issue Date (except as expressly  provided in Section
8(c)(i) or 8(c)(ii) with respect to certain events under the Rights  Agreement),
and any  issuance  of Rights  (defined  below) or other  rights  referred  to in
Section 8(c)(x),  shall not be deemed to constitute an issuance of Common Stock,
options,   warrants,   rights,  or  exercisable,   exchangeable  or  convertible
securities by the  Corporation  or any of its  subsidiaries  to which any of the
adjustment  provisions  described  above in this Section 8 applies.  There shall
also be no  adjustment  of the  conversion  price in case of the issuance of any
stock  (or  options,   warrants,  rights,  or  securities  convertible  into  or
exchangeable or exercisable for stock) of the Corporation except as specifically
described  in this  Section 8. If any action  would  require  adjustment  of the
conversion  price pursuant to more than one of the provisions  described  above,
only one  adjustment  shall be made and such  adjustment  shall be the amount of
adjustment  which has the  highest  absolute  value to the  holders  of Series B
Cumulative Convertible Preferred Stock.

                  (j)  Preferred  Share  Purchase  Rights.  So long as Preferred
Share Purchase Rights, of the kind authorized and declared on September 23, 1988
and  distributed by the  Corporation in September 1988 as the same have been and
may hereafter be amended  ("Rights"),  are attached to the outstanding shares of
Common  Stock  of the  Corporation,  each  share of  Common  Stock  issued  upon
conversion  of the shares of Series B  Cumulative  Convertible  Preferred  Stock
prior to the  earliest  of any  Distribution  Date  (as  defined  in the  Rights
Agreement),  the date of  redemption  of the Rights or the date of expiration of
the  Rights  shall be issued  with  Rights in an amount  equal to the  amount of
Rights then attached to each such outstanding share of Common Stock.


                                       25



                  (k) Certain  Additional Rights. In case the Corporation shall,
by dividend  or  otherwise,  authorize,  declare or make a  distribution  on its
Common Stock referred to in Section 8(c)(iv) or Section  8(c)(v),  the holder of
each  share  of  Series  B  Cumulative  Convertible  Preferred  Stock,  upon the
conversion thereof subsequent to the close of business on the date fixed for the
determination of stockholders entitled to receive such distribution and prior to
the  effectiveness  of the  conversion  price  adjustment  in  respect  of  such
distribution pursuant to Section 8(c)(iv) or Section 8(c)(v),  shall be entitled
to  receive  for each  share of Common  Stock  into which such share of Series B
Cumulative  Convertible  Preferred  Stock  is  converted,  the  portion  of  the
evidences  of  indebtedness,  shares of stock,  cash and  assets so  distributed
applicable  to one  share of  Common  Stock;  provided,  however,  that,  at the
election of the Corporation  (whose election shall be evidenced by a vote of the
Board of Directors)  with respect to all holders so converting,  the Corporation
may, in lieu of distributing to such holder any portion of such distribution not
consisting of cash or securities of the  Corporation,  pay such holder an amount
in cash equal to the fair market value  thereof (as  determined  by the Board of
Directors,  whose  determination  shall be conclusive and described in a vote of
the Board of  Directors).  If any  conversion  of a share of Series B Cumulative
Convertible  Preferred  Stock described in the  immediately  preceding  sentence
occurs prior to the payment date for a  distribution  to holders of Common Stock
which the holder of the share of Series B Cumulative Convertible Preferred Stock
so converted is entitled to receive in accordance with the immediately preceding
sentence,  the  Corporation  may  elect  (such  election  to be  evidenced  by a
resolution  of the Board of  Directors)  to distribute to such holder a due bill
for the evidences of indebtedness, shares of stock, cash or assets to which such
holder is so  entitled;  provided  that  such due bill (i) meets any  applicable
requirements of the principal  national  securities  exchange or other market on
which the Common Stock is then traded and (ii)  requires  payment or delivery of
such evidences of  indebtedness,  shares of stock,  cash or assets no later than
the date of payment or  delivery  thereof to holders of Common  Stock  receiving
such  distribution.  The rights  provided in this  Section  8(k) with respect to
distribution referred to in Section 8(c)(iv) or Section 8(c)(v) shall be in lieu
of,  and not in  addition  to,  the  rights  accorded  to  holders  of  Series B
Cumulative Convertible Preferred Stock in those Sections.

                  (l) Other. Notwithstanding any other provision in this Section
8 to  the  contrary,  if  the  Corporation  shall,  by  dividend  or  otherwise,
authorize,  declare or make a  distribution  on its Common Stock  referred to in
Section 8(c)(iv) and such  distribution  shall include shares of stock of one or
more  corporations that immediately prior to such distribution was or would have
been a  subsidiary  (a  "Spin-Off"),  the  holder  of each  share  of  Series  B
Cumulative Convertible Preferred Stock shall be entitled to receive its pro rata
share of the  securities  distributed in the Spin-Off as if such holder had been
the  holder of record of the  number of shares of Common  Stock  into  which the
Series B Cumulative Convertible Preferred Stock would be convertible (but for


                                       26



any restrictions on convertibility  contained in this Certificate of Vote) as of
the record date for such distribution.  The rights provided in this Section 8(l)
with  respect  to  Spin-Offs  shall be in lieu of, and not in  addition  to, the
rights  accorded to holders of Series B Cumulative  Convertible  Preferred Stock
with respect to Spin-Offs in Section 8(c)(iv).

         9.       Voting Rights.

                  (a)  General.  The  holders  of shares of Series B  Cumulative
Convertible  Preferred  Stock shall each  initially  have Twenty and  Sixty-Five
Thousand Six Hundred and Forty-Eight  Hundred-Thousandths  (20.65648)  votes for
each share held, which such shares shall be voted as a class with the holders of
the Common  Stock on all matters on which the Common  Stock may vote,  except as
set forth below.  Upon the  occurrence of any event that causes an adjustment to
the conversion  price pursuant to Section 8(c), the number of votes possessed by
each share of Series B Cumulative  Convertible Stock shall be adjusted such that
the number of votes  possessed  by each such share  immediately  after the event
giving rise to the adjustment under Section 8(c) shall be the number, rounded to
the nearest one-hundred thousandth,  equal to the Liquidation Preference divided
by the conversion  price  immediately  after such event.  Any shares of Series B
Cumulative  Convertible  Preferred  Stock held by the  Corporation or any entity
controlled by the Corporation  shall not have voting rights  hereunder and shall
not be counted in determining the presence of a quorum.

                  (b)      Special Default Voting Rights.

                           (i) Whenever a Special Default exists, (1) the number
of members of the Board of  Directors  shall be  increased  by such number as is
necessary  to allow the election of the  directors  specified in clause (2), and
(2) the holders of the Series B Cumulative  Convertible  Preferred Stock, voting
separately  as a class,  shall have the right to elect an  additional  number of
directors to the Board of Directors such that Designated  Directors  selected by
the holders of the Series B Cumulative  Convertible  Preferred  Stock,  plus the
directors  elected  by  such  holders  voting  as a  class  under  this  clause,
constitute a majority of Board.  Notwithstanding  the  foregoing  sentence,  the
holders  of  the  Series  B  Cumulative   Convertible  Preferred  Stock  (voting
separately as a class) will not have the right to vote for additional  directors
pursuant to this Section 9(b) where (x) such holders have exercised  their right
to elect  additional  directors  pursuant  to  Section  7(e)(iii),  and (y) such
additional  directors continue to serve as such. The right of the holders of the
Series B  Cumulative  Convertible  Preferred  Stock to vote for such  additional
directors  shall  terminate  at the  earlier  to occur of (A) when such  Special
Default  no longer  exists or (ii) two years  after the  election  of  directors
pursuant to clause (2) of the first sentence of this Section. The term of office
of all directors so elected shall terminate immediately upon the termination of


                                       27


the right of the holders of the Series B Cumulative  Convertible Preferred Stock
to vote for such additional directors,  and the number of directors of the Board
of Directors shall immediately thereafter be reduced.

                           (ii) The foregoing right of the holders of the Series
B  Cumulative  Convertible  Preferred  Stock  with  respect to the  election  of
additional  directors may be exercised at each annual meeting of stockholders or
at any special  meeting of stockholders  held for such purpose.  If the right to
elect  directors  shall have  accrued to the holders of the Series B  Cumulative
Convertible  Preferred  Stock  more than  thirty  (30) days  preceding  the date
established  for the next annual meeting of  stockholders,  the President of the
Corporation shall, within five (5) days after the delivery to the Corporation at
its principal  office of a written  request for a special  meeting signed by the
holders of at least 10% of all  outstanding  shares of the  Series B  Cumulative
Convertible Preferred Stock, call a special meeting of the holders of the Series
B Cumulative  Convertible  Preferred Stock to be held as promptly as practicable
after the delivery of such request for the purpose of electing  such  additional
directors.

                           (iii)  The   holders  of  the  Series  B   Cumulative
Convertible  Preferred  Stock referred to above voting as a class shall have the
right to remove with or without cause at any time and replace any directors such
holders shall have elected pursuant to this Section 9(c) and the holders of each
other class of stock of the  Corporation  shall not have the right to remove any
such directors.

                  (c) Class Voting Rights. So long as any shares of the Series B
Cumulative  Convertible  Preferred Stock are outstanding,  the Corporation shall
not,  directly or  indirectly,  without the  affirmative  vote or consent of the
holders of at least 66 2/3% (unless a higher  percentage  shall then be required
by applicable law or the  Corporation's  Articles) of all outstanding  shares of
the Series B  Cumulative  Convertible  Preferred  Stock voting  separately  as a
class: (i) amend, alter or repeal any provision of the Articles,  Certificate of
Vote, or the bylaws of the Corporation, if such amendment,  alteration or repeal
would alter the contract rights,  as expressly set forth herein, of the Series B
Cumulative  Convertible  Preferred  Stock or otherwise  to adversely  affect the
rights of the holders  thereof or the holders of the Common Stock,  (ii) create,
authorize  or  issue,  or amend the terms of in a manner  adversely  affect  the
rights of the holders the Series B Cumulative  Convertible  Preferred  Stock, or
reclassify  shares of any authorized stock of the Corporation  into, or increase
the authorized amount of, any Senior Dividend Stock,  Senior  Liquidation Stock,
Parity Dividend Stock, or Parity  Liquidation Stock or any security  convertible
into such senior or Parity Stock, or (iii) approve a Fundamental Change.


                                       28


         10.  Outstanding  Shares. For purposes of this Certificate of Vote, all
shares  of  Series  B  Cumulative  Convertible  Preferred  Stock  issued  by the
Corporation  shall be  deemed  outstanding  except  (i) from the date  fixed for
redemption  pursuant  to  Section 6 hereof,  all  shares of Series B  Cumulative
Convertible  Preferred  Stock  that  have been so called  for  redemption  under
Section 6, to the extent provided thereunder; (ii) from the date of surrender of
certificates  representing shares of Series B Cumulative  Convertible  Preferred
Stock, all shares of Series B Cumulative  Convertible  Preferred Stock converted
into Common Stock or  repurchased  pursuant to Section 7 hereof;  and (iii) from
the date of  registration  of  transfer,  all  shares  of  Series  B  Cumulative
Convertible   Preferred   Stock  held  of  record  by  the  Corporation  or  any
majority-owned subsidiary of the Corporation.

         11.      Transfer Restrictions.

                  (a) Legends on Series B Cumulative Convertible Preferred Stock
and Common Stock.  The certificates  representing  shares of Series B Cumulative
Convertible  Preferred Stock shall,  unless  otherwise agreed by the Corporation
and the holders of any such  certificates,  bear a legend  substantially  to the
following effect:

         "THE SHARES REPRESENTED BY THIS CERTIFICATE AND ANY SECURITIES ISSUABLE
         UPON  CONVERSION  OR EXCHANGE  HEREOF MAY NOT BE OFFERED OR SOLD EXCEPT
         PURSUANT  TO  (i)  AN  EFFECTIVE   REGISTRATION   STATEMENT  UNDER  THE
         SECURITIES   ACT  OF  1933,  OR  (ii)  AN  APPLICABLE   EXEMPTION  FROM
         REGISTRATION  THEREUNDER.  ANY  SALE  PURSUANT  TO  CLAUSE  (ii) OF THE
         PRECEDING  SENTENCE  MUST  BE  ACCOMPANIED  BY AN  OPINION  OF  COUNSEL
         REASONABLY  SATISFACTORY TO PERINI  CORPORATION TO THE EFFECT THAT SUCH
         EXEMPTION FROM  REGISTRATION IS AVAILABLE IN CONNECTION WITH SUCH SALE.
         IN  ADDITION,  THE  VOTING,  SALE,  ASSIGNMENT,   TRANSFER,  PLEDGE  OR
         HYPOTHECATION OF THE SHARES  REPRESENTED BY THIS CERTIFICATE IS FURTHER
         SUBJECT TO RESTRIC TIONS WHICH ARE  CONTAINED IN THE RESTATED  ARTICLES
         OF  ORGANIZATION  OF PERINI  CORPORATION,  IN THE  CERTIFICATE  OF VOTE
         GOVERNING  THESE SHARES AND IN A STOCK PURCHASE  AGREEMENT  DATED AS OF
         JULY 24,  1996,  AS  AMENDED,  A COPY OF EACH OF WHICH IS ON FILE  WITH
         PERINI  CORPORATION  AND WILL BE  FURNISHED BY THE  CORPORATION  TO THE
         STOCKHOLDER ON REQUEST AND WITHOUT CHARGE."


                                       29



                  (b) Transfer Agent Requirements. The transfer agent (which may
be the  Corporation)  for the Series B Cumulative  Convertible  Preferred  Stock
shall not be  required  to accept for  registration  of  transfer  any shares of
Series B Cumulative  Convertible Preferred Stock bearing the legend contained in
paragraph  (a) above,  except  upon  presentation  of evidence  satisfactory  to
transfer  agent  that the  restrictions  on  transfer  of shares of the Series B
Cumulative  Convertible  Preferred  Stock referred to in the legend in paragraph
(a) have been complied with, all in accordance with such reasonable  regulations
as the  Corporation  may from time to time  agree  with the  transfer  agent for
shares of the Series B Cumulative Convertible Preferred Stock.

         12.  Status  of  Acquired   Shares.   Shares  of  Series  B  Cumulative
Convertible Preferred Stock redeemed or repurchased by the Corporation, received
upon conversion  pursuant to Section 8 or otherwise  acquired by the Corporation
will be restored to the status of  authorized  but unissued  shares of Preferred
Stock, without designation as to class, and may thereafter be issued, but not as
shares of Series B Cumulative Convertible Preferred Stock.

         13.      Special Covenants.

                  (a)  Nomination  of  Directors.  Effective  as of the Original
Issue  Date,  the  Corporation  shall  elect  to the  board of  directors  three
directors designated by the holders of such stock (such directors, together with
their replacements as provided below, the "Designated  Directors"),  one of whom
shall be a Class I director,  one of whom shall be a Class II director,  and one
of whom shall be a Class III director. The holders of a majority of the Series B
Cumulative  Convertible  Preferred  Stock  shall  designate  the classes of such
initial Designated Directors.

                           (i) In the event that any  Designated  Director shall
resign,  be unable to serve, or be removed (a "Replaced  Designated  Director"),
the holders of a majority of the Series B Cumulative Convertible Preferred Stock
shall have the right to designate a replacement to serve as Designated  Director
until the next meeting of  shareholders  at which directors of the same class as
the Replaced  Designated  Director are elected.  Any Designated  Director may be
removed from the Board,  with or without cause,  by the holders of a majority of
the Series B Cumulative Convertible Preferred Stock.

                           (ii) Except as provided  below,  at any time when the
term of a Designated  Director  shall have ended and there shall be a meeting of
shareholders  of the  Corporation  to elect  directors,  the  Corporation  shall
nominate  for  election  to  the  board  of  directors,  as a  successor  to any
Designated  Director  serving  pursuant  to Section  13(a) or clause (i) of such
provision,  such  person as is  designated  to be a  Designated  Director by the
holders of a majority of the Series B Cumulative Convertible Preferred Stock.


                                       30


                           (iii) In the event  that the  holders of the Series B
Cumulative  Convertible  Preferred  Stock  dispose of such  stock or  Conversion
Shares (defined below)  representing more than sixty-six and two-thirds  percent
(66-2/3%) and less than or equal to eighty  percent (80%) of the voting power of
the Series B Cumulative Convertible Preferred Stock issued on the Original Issue
Date (plus any payment-in-kind dividends paid thereon), the number of Designated
Directors  shall be reduced to two.  If there are then more than two  Designated
Directors  serving on the  board,  the  holders  of a  majority  of the Series B
Cumulative Convertible Preferred Stock shall remove one such Designated Director
and the holders of such stock shall not have any right,  pursuant to clause (ii)
or otherwise,  to cause the  Corporation  to nominate a designated  successor to
such removed director.

                           (iv) In the event  that the  holders  of the Series B
Cumulative  Convertible  Preferred  Stock  dispose of such  stock or  Conversion
Shares representing more than eighty percent (80%) and less than or equal ninety
percent  (90%) of the  voting  power  of the  Series  B  Cumulative  Convertible
Preferred  Stock  issued on the  Original  Issue Date (plus any  payment-in-kind
dividends paid thereon),  the number of Designated Directors shall be reduced to
one. If there is then more than one  Designated  Director  serving on the board,
the holders of a majority of the Series B Cumulative Convertible Preferred Stock
shall remove all but one such Designated  Director and the holders of such stock
shall not have any right,  pursuant  to clause (ii) or  otherwise,  to cause the
Corporation to nominate a designated successor to such removed director(s).

                           (v) In the event  that the  holders  of the  Series B
Cumulative  Convertible  Preferred  Stock  dispose of such  stock or  Conversion
Shares  representing  more than ninety  percent (90%) of the voting power of the
Series B Cumulative  Convertible  Preferred  Stock issued on the Original  Issue
Date  (plus any  payment-in-kind  dividends  paid  thereon),  there  shall be no
Designated  Directors  and any  Designated  Directors  then serving on the board
shall be removed,  and their terms in office shall immediately  expire,  without
any further action of the holders of such stock.

                           (vi) The right to nominate directors pursuant to this
provision  is in addition  to, and not in  limitation  of, any other  rights and
powers  of the  Series  B  Cumulative  Convertible  Preferred  Stock.  Directors
nominated by the holders of the Series B Cumulative  Convertible Preferred Stock
in their  capacity  as  holders  of  capital  stock of the  Corporation  and not
pursuant to clause (i),  (ii), or (iii) above are not  Designated  Directors for
purposes of this Certificate of Vote.

                           (vii) The vote of the holders of Series B  Cumulative
Convertible Preferred Stock referred to in this Section may be exercised at a


                                       31


meeting  of such  holders or by written  consent of holders  with the  requisite
percentage of the voting power outstanding.

                           (viii)   Upon   the   reasonable   request   of   the
Corporation,  the holders of the Series B Cumulative Convertible Preferred Stock
shall certify in writing to the Corporation their holding of Conversion Shares.

                           (ix)     For purposes of this Section:

                                    (1) "voting  power" shall mean the number of
votes each such share possesses in the election of directors; and

                                    (2)  "Conversion   Shares"  shall  mean  the
shares of Common Stock which are both (A) issuable or issued upon  conversion of
the Series B Cumulative  Convertible  Preferred  Stock  pursuant to the terms of
this  Certificate of Vote of Directors,  and (B) held by a person who either (x)
acquired the shares of the Series B Cumulative  Convertible Preferred Stock from
which the shares referred to in clause (A) of this definition were converted and
has held such Common Stock continuously  thereafter,  or (y) acquired the shares
referred to in clause (A) of this definition from a person referred to in clause
(B)(x)  of this  definition  through  a  distribution  to the  partners  by,  or
dissolution of, a partnership.

                  (b) Appointment to Executive  Committee.  At any time at which
the holders of the Series B Cumulative  Convertible  Preferred  Stock shall have
the right to nominate  directors  for election to the board  pursuant to Section
13(a) hereof,  such holders shall also have the right to designate a like number
of persons from among the members of the board of directors to be members of the
Executive Committee of the board (the "Designated Executive Committee Members").
In the event that any Designated  Executive  Committee  Member shall resign,  be
unable to serve,  or be  removed,  the  holders  of a  majority  of the Series B
Cumulative  Convertible  Preferred  Stock  shall have the right to  designate  a
replacement  Designated  Executive  Committee Member.  Any Designated  Executive
Committee  Member may be removed from the Executive  Committee,  with or without
cause,  by the  holders of a majority  of the  Series B  Cumulative  Convertible
Preferred Stock.

                  (c) Approval of Certain  Actions.  Neither the Corporation nor
the Board shall take any of the  following  actions  without  the  approval of a
majority  of the  members  of the  Executive  Committee  of the  Board:  (A) any
borrowing or guarantee by the Corporation  exceeding $15 million, (B) except for
issuance of stock or stock options pursuant to (x) the  Corporation's  incentive
compensation  plans and programs,  (y) any warrants  outstanding on the Original
Issue  Date,  or (z) the  Rights,  any  issuance  of stock  (whether  common  or
preferred,  whether voting or non-voting,  whether junior, pari passu, or senior
to the Series B Cumulative Convertible Preferred Stock) other


                                       32



than Common Stock in an aggregate  amount not exceeding five percent (5%) of the
Common  Stock  issued  and  outstanding  on the  Original  Issue  Date,  (C) any
strategic alliance (other than a construction joint venture) involving a capital
commitment by the  Corporation  exceeding $5 million,  (D) any asset sale by the
Corporation or lease by it as lessor  exceeding $5 million (other than equipment
dispositions in the normal course of business);  (E) any redemption or amendment
of the  Rights  or the  preferred  stock of the  Corporation  issuable  upon the
exercise of such Rights, or any amendment of the Rights  Agreement;  and (F) any
termination  of (other than a termination  upon  expiration) or amendment to the
management  agreement  among the  Corporation,  Ronald  Tutor  and  Tutor-Saliba
Corporation;  provided,  however,  that  for  purposes  of this  Section  13(c),
approval of the  Executive  Committee  shall not be required for any decision by
the Board of Directors to redeem the Series B Cumulative  Convertible  Preferred
Stock  pursuant to Section 6(a).  Notwithstanding  the foregoing  sentence,  the
board of directors of the Corporation  may take any of the actions  specified in
the preceding sentence if, after having consulted with and considered the advice
of outside counsel, it has reasonably  determined in good faith that the failure
of the board to take such  action  would be likely to cause the  members of such
board to breach their fiduciary duties under applicable law.

         14.  Severability  of  Provisions.  Whenever  possible,  each provision
hereof  shall be  interpreted  in a manner as to be  effective  and valid  under
applicable  law,  but if any  provision  hereof is held to be  prohibited  by or
invalid under  applicable law, such provision  shall be ineffective  only to the
extent of such  prohibition or  invalidity,  without  invalidating  or otherwise
adversely  affecting the remaining  provisions  hereof.  If a court of competent
jurisdiction  should  determine  that a  provision  hereof  would  be  valid  or
enforceable  if a period of time were  extended  or  shortened  or a  particular
percentage were increased or decreased,  then such court may make such change as
shall be necessary to render the provision in question effective and valid under
applicable law.


IN WITNESS WHEREOF AND UNDER THE PENALTIES OF PERJURY, we have hereto signed our
names this 15th day of January in the year 1997.


/s/ David B. Perini, President
- -------------------

/s/ Richard E. Burnham, Clerk
- ----------------------
- -------------------------------------------------------------------------------


                        THE COMMONWEALTH OF MASSACHUSETTS


                                       33




                  Certificate of Vote of Directors Establishing
                          A Series of a Class of Stock

                    (General Laws, Chapter 156B, Section 26)

                           I hereby  approve  the within  certificate  and,  the
                           filing fee in the amount of $100.00 having been paid,
                           said  certificate  is hereby  filed  this 16th day of
                           January 1997.


                                                   /s/William Francis Galvin
                                                   William Francis Galvin
                                                   Secretary of the Commonwealth


                           Photocopy of Certificate to Be Sent

                           To:

                           Richard A. Soden, Esq.
                           Goodwin, Procter & Hoar  LLP
                           Exchange Place
                           Boston, MA 02109
                           Tel: (617) 570-1000


360149.c1

                                       34