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                                                                 Exhibit (3)(i)a

                            CERTIFICATE OF AMENDMENT

                                       OF

                     RESTATED CERTIFICATE OF INCORPORATION

                                       OF

                           COMMERCIAL METALS COMPANY

         COMMERCIAL METALS COMPANY, a corporation organized and existing under
the General Corporation Law of the State of Delaware (the "Corporation"), DOES
HEREBY CERTIFY:

         FIRST:  That the Board of Directors of the Corporation, at a meeting
duly held, adopted resolutions setting forth the following amendment to the
Corporation's Restated Certificate of Incorporation, declaring this amendment
to be advisable and designating the next annual meeting of the stockholders of
the Corporation for consideration thereof:

         The present Article Seventeenth of the Corporation's Restated
Certificate of Incorporation shall be replaced in its entirety by the
following:

         SEVENTEENTH:     The stockholder vote required to approve any Business
Combination (as hereinafter defined) shall be as set forth in this Article
Seventeenth.

         (a)(1) Except as otherwise expressly provided in paragraph (b) of this
Article Seventeenth:

                 (A)      Any merger or consolidation of the corporation or any
         Subsidiary (as hereinafter defined) with (i) any Interested
         Stockholder (as hereinafter defined) or (ii) any other corporation
         (whether or not itself an Interested Stockholder) which is, or after
         such merger or consolidation would be, an Affiliate (as hereinafter
         defined) of an Interested Stockholder; or
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                 (B)      any sale, lease, exchange, mortgage, pledge, transfer
         or other disposition (in one transaction or a series of transactions)
         to or with any Interested Stockholder or any Affiliate of any
         Interested Stockholder of any assets of the corporation or any
         Subsidiary having an aggregate Fair Market Value (as hereinafter
         defined) of $25,000,000 or more; or

                 (C)      the issuance or transfer by the corporation or any
         Subsidiary (in one transaction or a series of transactions) of any
         securities of the corporation or any Subsidiary to any Interested
         Stockholder or any Affiliate of any Interested Stockholder in exchange
         for cash, securities or other property (or a combination thereof)
         having an aggregate Fair Market Value of $25,000,000 or more; or

                 (D)      the adoption of any plan or proposal for the
         liquidation or dissolution of the corporation proposed by or on behalf
         of any Interested Stockholder or any Affiliate of any Interested
         Stockholder; or

                 (E)      any reclassification of securities (including any
         reverse stock split) or recapitalization of the corporation, or any
         merger or consolidation of the corporation with any of its
         Subsidiaries or any other transaction (whether or not with or into or
         otherwise involving any Interested Stockholder) which has the effect,
         directly or indirectly, of increasing the proportionate share of the
         outstanding shares of any class of equity or convertible securities of
         the corporation or any subsidiary which is directly or indirectly
         owned by any Interested Stockholder or any Affiliate of any
         Interested Stockholder;

shall require the affirmative vote of the holders of at least 70% of the voting
power of all of the then-outstanding shares of the Voting Stock, voting
together as a single class (it being understood that for purposes of this
Article Seventeenth, each share of the Voting Stock shall have the number of
votes granted to it pursuant to Article Fourth of this Restated Certificate of
Incorporation). Such affirmative vote shall be required notwithstanding the
fact that no vote may be required, or that a lesser percentage may be
specified, by law or in any agreement with any national securities exchange or
otherwise, and shall be required in addition to any affirmative vote of the
holders of any particular class or series of Voting Stock required by law or
this Restated Certificate of Incorporation.





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         (2)     The term "Business Combination" as used in this Article
Seventeenth shall mean any transaction which is referred to in any one or more
of subsections (A) through (E) of subparagraph (1) of this section (a).

         (b)     The provisions of section (a) of this Article Seventeenth
shall not be applicable to any particular Business Combination, and such
Business Combination shall require only such affirmative vote as is required by
law, by any other provision of this Restated Certificate of Incorporation or by
any agreement with any national securities exchange, if, in the case of a
Business Combination that does not involve any cash or other consideration
being received by the stockholders of the corporation, solely in their
respective capacities as stockholders of the corporation, the condition
specified in the following subparagraph (1) is met, or, in the case of any
other Business Combination, the conditions specified in either of the following
subparagraphs (1) or (2) are met:

                 (1)      The Business Combination shall have been approved by
         a majority of the Disinterested Directors (as hereinafter defined), it
         being understood that this condition shall not be capable of
         satisfaction unless there is at least one Disinterested Director.

                 (2) All of the following conditions shall have been met:

                          (A)     The consideration to be received by holders
                 of shares of a particular class of outstanding Voting Stock
                 shall be in cash or in the same form as the Interested
                 Stockholder has paid for shares of such class of Voting Stock
                 within the two-year period ending on and including the date on
                 which the Interested Stockholder became an Interested
                 Stockholder (the "Determination Date"). If, within such
                 two-year period, the Interested Stockholder has paid for
                 shares of any class of Voting Stock with varying forms of
                 consideration, the form of consideration to be received per
                 share by holders of shares of such class of Voting Stock shall
                 be either cash or the form used to acquire the largest number
                 of shares of such class of Voting Stock acquired by the
                 Interested Stockholder within such two-year period.

                          (B)     The aggregate amount of (x) the cash and (y)
                 the Fair Market Value, as of the date (the "Consummation
                 Date") of the consummation of the Business Combination, of the
                 consideration other than





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                 cash to be received per share by holders of Common Stock in
                 such Business Combination shall be at least equal to the
                 higher of the following (it being intended that the
                 requirements of this subparagraph (2)(B) shall be required to
                 be met with respect to all shares of Common Stock outstanding
                 whether or not the Interested Stockholder has previously
                 acquired any shares of Common Stock):

                                  (i)   (if applicable) the highest per
                          share price (including any brokerage commissions,
                          transfer taxes and soliciting dealers' fees) paid by
                          the Interested Stockholder for any shares of Common
                          Stock acquired by it within the two-year period
                          immediately prior to the date of the first public
                          announcement of the proposal of the Business
                          Combination (the "Announcement Date") or in the
                          transaction in which it became an Interested
                          Stockholder, whichever is higher, plus interest
                          compounded annually from the Determination Date
                          through the Consummation Date at the prime rate of
                          interest of Citibank, N.A. (or such other bank as may
                          be selected by the Disinterested Directors), in
                          effect from time to time, less the aggregate amount
                          of any cash dividends paid, and the Fair Market Value
                          of any dividends paid in other than cash, on each
                          share of Common Stock from the Determination Date
                          through the Consummation Date, in an amount up to but
                          not exceeding the amount of interest so payable per
                          share of Common Stock; or

                                  (ii)  The Fair Market Value per share of 
                          Common Stock on the Announcement Date.

                          (C)     The aggregate amount of (x) the cash and (y)
                 the Fair Market Value, as of the Consummation Date, of the
                 consideration other than cash to be received per share by
                 holders of shares of any class, other than Common Stock, of
                 outstanding Voting Stock shall be at least equal to the
                 highest of the following (it being intended that the
                 requirements of this subparagraph (2)(C) shall be required to
                 be met with respect to every such class of outstanding Voting
                 Stock, whether or not the Interested Stockholder has
                 previously acquired any shares of a particular class of Voting
                 Stock):





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                                  (i)   (if applicable) the highest per
                          share price (including any brokerage commissions,
                          transfer taxes and soliciting dealers' fees) paid by
                          the Interested Stockholder for any shares of such
                          class of Voting Stock acquired by it within the
                          two-year period immediately prior to the Announcement
                          Date or in the transaction in which it became an
                          Interested Stockholder, whichever is higher, plus
                          interest compounded annually from the Determination
                          Date through the Consummation Date at the prime rate
                          of interest of Citibank, N.A. (or such other bank as
                          may be selected by the Disinterested Directors), in
                          effect from time to time, less the aggregate amount
                          of any cash dividends paid, and the Fair Market Value
                          of any dividends paid in other than cash, on each
                          share of such class of Voting Stock from the
                          Determination Date through the Consummation Date in
                          an amount up to but not exceeding the amount of
                          interest so payable per share of such class of Voting
                          Stock; or

                                  (ii)  the Fair Market Value per share of
                          such class of Voting Stock on the Announcement Date;
                          or

                                  (iii) the highest preferential amount per
                          share to which the holders of shares of such class of
                          Voting Stock are entitled in the event of any
                          voluntary or involuntary liquidation, dissolution or
                          winding up of the corporation.

                          (D)     After such Interested Stockholder has become
                 an Interested Stockholder and prior to the consummation of
                 such Business Combination: (x) except as approved by a
                 majority of the Disinterested Directors, there shall have been
                 no failure to declare and pay at the regular date therefor any
                 full quarterly dividends (whether or not cumulative) on any
                 outstanding Preferred Stock; (y) there shall have been (i) no
                 reduction in the annual rate of dividends paid on the Common
                 Stock (except as necessary to reflect any subdivision of the
                 Common Stock), except as approved by a majority of the
                 Disinterested Directors, and (ii) an increase in such annual
                 rate of dividends as necessary to reflect any reclassification
                 (including any reverse stock split), recapitalization,
                 reorganization or any similar transaction which has the effect
                 of reducing the number of outstanding shares of the Common
                 Stock,





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                 unless the failure so to increase such annual rate is approved
                 by a majority of the Disinterested Directors; and (z) such
                 Interested Stockholder shall have not become the beneficial
                 owner of any additional shares of Voting Stock except as part
                 of the transaction which results in such Interested
                 Stockholder's becoming an Interested Stockholder.

                          (E)     After such Interested Stockholder has become
                 an Interested Stockholder, such interested Stockholder shall
                 not have received the benefit, directly or indirectly (except
                 proportionately as a stockholder of the corporation), of any
                 loans, advances, guarantees, pledges or other financial
                 assistance or any tax credits or other tax advantages provided
                 by the corporation, whether in anticipation of or in
                 connection with such Business Combination or otherwise.

                          (F)     A proxy or information statement describing
                 the proposed Business combination and complying with the
                 requirements of the Securities Exchange Act of 1934 and the
                 rules and regulations thereunder (or any subsequent provisions
                 replacing such Act, rules or regulations) shall be mailed to
                 all stockholders of the corporation at least 30 days prior to
                 the consummation of such Business Combination (whether or not
                 such proxy or information statement is required to be mailed
                 pursuant to such Act or subsequent provisions).

         (c)     For the purposes of this Article Seventeenth:

                 (1)      A "person" shall mean any individual, firm,
         corporation or other entity.
         
                 (2)      "Interested Stockholder" shall mean any person (other
         than the corporation or any Subsidiary) who or which:

                          (A)     is the beneficial owner, directly or
                 indirectly, of more than 10% of the voting power of the
                 outstanding Voting Stock; or

                          (B)     is an Affiliate of the corporation and at any
                 time within the two-year period immediately prior to the date
                 in question was the beneficial owner, directly or indirectly,
                 of 10% or more of the voting power of the then-outstanding
                 Voting Stock; or





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                          (C)     is an assignee of or has otherwise succeeded
                 to any shares of Voting Stock which were at any time within
                 the two-year period immediately prior to the date in question
                 beneficially owned by an Interested Stockholder, if such
                 assignment or succession shall have occurred in the course of
                 a transaction or series of transactions not involving a public
                 offering within the meaning of the Securities Act of 1933;

provided that the Trust shall not be an Interested Stockholder until such time
as the Trust shall become the beneficial owner of any shares of Voting Stock in
addition to the shares of Voting Stock of which it was the beneficial owner on
January 27, 1994; provided further that the Trust shall not become an
Interested Stockholder solely as a result of action taken solely by the
corporation that benefits all holders of Voting Stock pro rata based on their
ownership of Voting Stock.

                 (3)      A person shall be a "beneficial owner" of any Voting 
         Stock:

                          (A)     which such person or any of its Affiliates or
                 Associates (as hereinafter defined) beneficially owns,
                 directly or indirectly; or

                          (B)     which such person or any of its Affiliates or
                 Associates has (x) the right to acquire (whether such right is
                 exercisable immediately or only after the passage of time),
                 pursuant to any agreement, arrangement or understanding or
                 upon the exercise of conversion rights, exchange rights,
                 warrants or options, or otherwise, or (y) the right to vote
                 pursuant to any agreement, arrangement or understanding; or

                          (C)     which are beneficially owned, directly or
                 indirectly, by any other person with which such person or any
                 of its Affiliates or Associates has any agreement, arrangement
                 or understanding for the purpose of acquiring, holding, voting
                 or disposing of any shares of Voting Stock.

                 (4)      For the purposes of determining whether a person is
         an Interested Stockholder pursuant to subparagraph (2) of this
         paragraph (c), the number of shares of Voting Stock deemed to be
         outstanding shall include shares deemed owned through application of
         subparagraph (3) of this paragraph (c), but shall not include any
         other shares of Voting Stock which may be issuable pursuant to any





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         agreement, arrangement, or understanding, or upon exercise of
         conversion rights, warrants or options, or otherwise.

                 (5)      "Affiliate" or "Associate" shall have the respective
         meanings ascribed to such terms in Rule 12b-2 of the General Rules and
         Regulations under the Securities Exchange Act of 1934, as in effect on
         January 1, 1994.

                 (6)      "Subsidiary" means any corporation of which a
         majority of any class of equity security is owned, directly or
         indirectly, by the corporation; provided, however, that for the
         purposes of the definition of Interested Stockholder set forth in
         subparagraph (2) of this paragraph (c), the term "Subsidiary" shall
         mean only a corporation of which a majority of each class of equity
         security is owned, directly or indirectly, by the corporation.

                 (7)      "Disinterested Director" means any member of the
         board of directors of the corporation (the "Board") who is
         unaffiliated with the Interested Stockholder and was a member of the
         Board prior to the time that the Interested Stockholder became an
         Interested Stockholder, and any successor of a Disinterested Director
         who is unaffiliated with the Interested Stockholder and is recommended
         to succeed a Disinterested Director by a majority of Disinterested
         Directors then on the Board.

                 (8)      "Fair Market Value" means: (x) in the case of stock,
         the highest closing sale price during the 30-day period immediately
         preceding the date in question of a share of such stock on the
         Composite Tape for New York Stock Exchange-Listed Stocks, or, if such
         stock is not quoted on the Composite Tape, on the New York Stock
         Exchange, or, if such stock is not listed on such Exchange, on the
         principal United States securities exchange registered under the
         Securities Exchange Act of 1934 on which such stock is listed, or, if
         such stock is not listed on any such exchange, on the National Market
         System of the National Association of Securities Dealers, Inc.
         Automated Quotations System, or if such stock is not quoted on the
         National Market System, the highest closing bid quotation with respect
         to a share of such stock during the 30-day period preceding the date
         in question on the National Association of Securities Dealers, Inc.
         Automated Quotations System or any system then in use, or, if no such
         quotations are available, the fair market value on the date in
         question of a share of such stock as determined by the Board in good
         faith; and (y) in the case





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         of property other than cash or stock, the fair market value of such
         property on the date in question as determined by the Board in good
         faith.

                 (9)      In the event of any Business Combination in which the
         corporation survives, the phrase "consideration other than cash to be
         received" as used in subparagraphs (2)(A) and (2)(C) of paragraph (b)
         of this Article Seventeenth shall include the shares of Common Stock
         and/or the shares of any other class of outstanding Voting Stock
         retained by the holders of such shares.

         (d)     A majority of the total number of Disinterested Directors
(whether or not there exist any vacancies in previously authorized
directorships at the time any such determination as is hereinafter in this
paragraph (d) specified is to be made by the Board) shall have the power and
duty to determine, on the basis of information known to them after reasonable
inquiry, all facts necessary to determine compliance with this Article
Seventeenth, including, without limitation, (1) whether a person is an
Interested Stockholder, (2) the number of shares of Voting Stock beneficially
owned by any person, (3) whether a person is an Affiliate or Associate of
another, (4) whether the applicable conditions set forth in subparagraph (2) of
paragraph (b) have been met with respect to any Business Combination, and (5)
whether the assets which are the subject of any Business Combination have, or
the consideration to be received for the issuance or transfer of securities by
the corporation or any subsidiary in any Business Combination has, an aggregate
Fair Market Value of $25,000,000 or more.

         (e)     Nothing contained in this Article Seventeenth shall be
construed to relieve any Interested Stockholder from any fiduciary obligation
imposed by law.

         (f)     Unless extended pursuant to Article Twelfth of this Restated
Certificate of Incorporation, the provisions of this Article Seventeenth shall
expire and no longer be of any effect after 12 noon, Central time, on January
28, 1999.

         SECOND: That thereafter, pursuant to a resolution of the Board of
Directors of the Corporation, an annual meeting of stockholders of the
Corporation was duly called and held, upon notice in accordance with Section
222 of the General Corporation Law of the State of Delaware, at which meeting
the





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necessary number of shares as required by statute were voted in favor of the
amendment.

         THIRD:  That said amendment was duly adopted in accordance with the
applicable provisions of section 242 of the General Corporation Law of the
State of Delaware.

         IN WITNESS WHEREOF, the Corporation has caused this Certificate to be
signed by Stanley A. Rabin, its President, and attested by David M. Sudbury,
its Secretary this 1st day of February, 1994.

                                        

                                        COMMERCIAL METALS COMPANY  
                                                                   
                                        By:  /s/ STANLEY A. RABIN
                                             -----------------------------------
                                             Stanley A.Rabin   
                                             President         


ATTEST:                                                            

By:  /s/ DAVID M. SUDBURY
     ---------------------------
     David M. Sudbury
     Secretary

                           
                           
                           
                           
                           
                           




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