Exhibit 10.0.3






                               THIRD AMENDMENT TO
                         AMENDED AND RESTATED REVOLVING
                          CREDIT AND SECURITY AGREEMENT

                                  BY AND AMONG

                         PNC BANK, NATIONAL ASSOCIATION
                             (AS LENDER AND AGENT),

                                  THE LENDERS,

                                       AND

                              L. B. FOSTER COMPANY,
                                CXT INCORPORATED,
                                 NATMAYA, INC.,
                                       AND
                                  FOSMART, INC.
                                   (BORROWERS)





                                February 8, 2007



                     THIRD AMENDMENT TO AMENDED AND RESTATED
                       REVOLVING CREDIT SECURITY AGREEMENT


     THIS THIRD AMENDMENT TO AMENDED AND RESTATED  REVOLVING CREDIT AND SECURITY
AGREEMENT (the  "Amendment")  is made as of February 8, 2007, by and among L. B.
FOSTER  COMPANY,  a  corporation  organized  under  the  laws  of the  State  of
Pennsylvania  ("Foster"),  CXT INCORPORATED,  a corporation  organized under the
laws of the State of Delaware ("CXT"),  NATMAYA,  INC., a corporation  organized
under  the laws of the State of  Delaware  ("Natmaya"),  and  FOSMART,  INC.,  a
corporation  organized under the laws of the State of Delaware ("Fosmart") (each
a "Borrower" and collectively "Borrowers"), the financial institutions which are
now or which hereafter  become a party hereto  (collectively,  the "Lenders" and
individually a "Lender") and PNC BANK,  NATIONAL  ASSOCIATION  ("PNC"), as agent
for Lenders (PNC, in such capacity, the "Agent").

                              W I T N E S S E T H:

     WHEREAS,  the Borrowers,  the Lenders and Agent are parties to that certain
Amended and Restated  Revolving Credit and Security Agreement dated as of May 5,
2005,  as amended by a First  Amendment  thereto dated as of September 13, 2005,
and a Second Amendment thereto dated as of May 16, 2006 (as amended from time to
time, the "Agreement").

     WHEREAS,  the Borrowers  have  requested the Lenders to modify the terms of
the pricing as well as certain covenants under the Agreement.

     WHEREAS,  the parties  hereto desire to amend the terms of the Agreement as
provided for herein.

     NOW,  THEREFORE,  the parties  hereto,  in  consideration  of their  mutual
covenants and agreements hereinafter set forth and intending to be legally bound
hereby, covenant and agree as follows:

     1. Definitions.

     Defined  terms used  herein  shall have the  meanings  given to them in the
Agreement.

     2. The following  definitions set forth in Section 1.2 of the Agreement are
hereby amended and restated as follows:

     "Facility  Fee" shall mean a percentage  rate per annum equal to one fourth
of one percent (0.25%).



     "Permitted  Encumbrances"  shall  mean (a)  Liens in favor of Agent for the
benefit  of Agent  and  Lenders;  (b)  Liens  for  taxes,  assessments  or other
governmental  charges not  delinquent  or being  contested  in good faith and by
appropriate  proceedings  and with  respect to which proper  reserves  have been
taken by  Borrowers;  provided,  that,  the Lien  shall  have no  effect  on the
priority  of the  Liens in favor of Agent or the  value of the  assets  in which
Agent has such a Lien and a stay of  enforcement  of any such  Lien  shall be in
effect;   (c)  deposits  or  pledges  to  secure   obligations   under  worker's
compensation,  social security or similar laws, or under unemployment insurance;
(d) deposits,  security interests or pledges to secure bids, tenders,  contracts
(other than contracts for the payment of money), leases,  statutory obligations,
surety and appeal  bonds and other  obligations  of like  nature  arising in the
ordinary  course of any Borrower's  business;  (e) judgment Liens that have been
stayed or bonded and  mechanics',  workers',  materialmen's  or other like Liens
arising  in the  ordinary  course of any  Borrower's  business  with  respect to
obligations  which are not due or which are being contested in good faith by the
applicable  Borrower;  (f)  Liens  placed  upon  fixed  assets,   proceeds  from
disposition  thereof and other  property  directly  related  thereto,  hereafter
acquired to secure a portion of the purchase  price thereof (or refinance  fixed
assets acquired with proceeds of Revolving Advances,  so long as the proceeds of
such refinancing are applied to the outstanding  balance of Revolving  Advances)
or Liens of lessors on fixed assets subject to capital leases,  or Liens on Real
Property,  improvements and fixtures in connection with the financing of Capital
Expenditures,  provided  that in each case  above  (x) any such  lien  shall not
encumber any other property of Borrowers (other than related obligations owed to
such lender or lessor) and (y) the aggregate  amount of Indebtedness  secured by
such Liens incurred as a result of such  purchases  during any fiscal year shall
not exceed the amount provided for in Section 7.6; (g) other Liens incidental to
the conduct of  Borrowers'  business or the ownership of its property and assets
which  were  not  incurred  in  connection  with the  borrowing  of money or the
obtaining of advances or credit,  and which do not in the  aggregate  materially
detract from Agent's or Lenders' rights in and to the Collateral or the value of
Borrowers'  property or assets or which do not materially impair the use thereof
in the  operation of Borrowers'  business;  (h) Liens on assets of the Borrowers
other than Collateral which secure Indebtedness not exceeding $10,000,000 in the
aggregate at any one time  outstanding and which is permitted under Section 7.8;
and (i) Liens disclosed on Schedule 1.2(B).

     "Revolving  Interest  Rate" shall mean an interest  rate per annum equal to
(a) the sum of the  Alternate  Base Rate minus one percent  (1%) with respect to
Domestic  Rate  Loans  and (b)  the  sum of the  Eurodollar  Rate  plus  one and
one-fourth percent (1.25%) with respect to Eurodollar Rate Loans.

     3.  Section  7.2(b) of the  Agreement  is hereby  amended  and  restated as
follows:

     "(b) Enter  into or suffer to exist any  agreement  with any  Person  which
prohibits  or limits the  ability of any  Borrower to create,  incur,  assume or
suffer to exist any Lien upon or with  respect to any  property or assets of any
kind, real or personal,  tangible or intangible, now owned or hereafter acquired
(including,   without  limitation   Equipment,   Investment  Property  and  Real
Property),  other than (i) such agreements in favor of Agent or Lenders pursuant
to this Agreement and the Other Documents,  (ii) as set forth on Schedule 7.2(b)
hereto, and (iii) capital leases,  purchase money financing,  industrial revenue
bond financing and financing secured by Liens on Real Property, improvements and
fixtures in connection  with the financing of Capital  Expenditures  consummated
after the Closing Date (to the extent  permitted under this Agreement)  pursuant
to contracts which restrict Liens on the Equipment, Real Property, improvements,
fixtures and other capital assets (excluding any Inventory or Receivables) being
financed pursuant to such capital leases,  purchase money financing,  industrial
revenue bond financing or other secured financing."



     4. Section 7.4 of the Agreement is hereby amended and restated as follows:

     "7.4 Investments.

     Except  as  set  forth  on  Schedule  7.4  or as  permitted  under  Section
7.1(a)(ii),  purchase or acquire  obligations or stock of, or any other interest
in, any Person, except (a) obligations issued or guaranteed by the United States
of America or any agency  thereof,  (b) commercial  paper with maturities of not
more  than 180 days and a  published  rating of not less than A-1 or P-1 (or the
equivalent  rating),  (c) certificates of time deposit and bankers'  acceptances
having maturities of not more than 180 days and repurchase  agreements backed by
United States government  securities of a commercial bank if (i) such bank has a
combined  capital  and  surplus  of at  least  $500,000,000,  or (ii)  its  debt
obligations,  or those of a holding  company  of which it is a  Subsidiary,  are
rated not less than A (or the  equivalent  rating)  by a  nationally  recognized
investment  rating  agency,  (d) U.S.  money market funds that invest  solely in
obligations  issued or  guaranteed  by the United States of America or an agency
thereof,  (e)  investments  not in excess of  $1,000,000  at any one time in the
stock of Customers in settlement of Receivables  and related  obligations  which
are delinquent or in default by such  Customers,  and (f) equity  investments in
other corporations not in excess of five percent (5%) of the aggregate ownership
interests  of any such  corporation,  provided  that  prior to and after  giving
effect to any such investment (i) the Borrowers have Undrawn  Availability of at
least  $10,000,000,  and (ii) the aggregate  amount of all such investments then
existing does not exceed more than $10,000,000."

     5. Section 7.6 of the Agreement is hereby amended and restated as follows:

     "7.6 Capital Expenditures.

     Commencing  with the fiscal year ended  December,  31, 2006,  contract for,
purchase or make any  expenditure  or  commitments  for fixed or capital  assets
(including capitalized leases) in any fiscal year in an aggregate amount for all
Borrowers in excess of $12,000,000, exclusive of capital expenditures for direct
construction expenses and equipment costs incurred pursuant to the Union Pacific
Contract.  The  difference  between  $12,000,000  and the  actual  amount of the
aggregate  capital  expenditures  of the Borrowers in any fiscal year (excluding
the expenses  related to the Union Pacific  Contract) may be carried over to the
immediately  succeeding  fiscal  year.  In  addition  to the  foregoing  capital
expenditures,  the  Borrowers  may  make  capital  expenditures  for the  direct
construction  expenses  and  equipment  costs  of the  Union  Pacific  Contract,
provided that such capital expenditures do not violate the provisions of Section
7.8 or 7.11 and are made on or before  December 31, 2006.  Expenditures  made in
consummating  Permitted Acquisitions shall not be included in the calculation of
capital expenditures under this Section 7.6."



     6. Section 7.8 of the Agreement is hereby amended and restated as follows:

     "7.8 Indebtedness.

     Except as set forth on Schedule  7.8,  create,  incur,  assume or suffer to
exist any  Indebtedness  (exclusive  of trade  debt)  except in  respect  of (a)
Indebtedness  to Lenders under this  Agreement;  (b)  Indebtedness  incurred for
capital  expenditures  permitted under Section 7.6 hereof;  (c) Indebtedness for
the direct  construction  expenses and equipment costs incurred  pursuant to the
Union Pacific Contract;  and (d) other Indebtedness not to exceed $10,000,000 in
the  aggregate  at any one  time  outstanding.  Notwithstanding  the  foregoing,
Indebtedness for the direct  construction  expenses and equipment costs incurred
pursuant to the Union Pacific Contract and permitted under this Section 7.8 plus
the  operating  lease  obligations  incurred  under Section 7.11 pursuant to the
Union Pacific Contract shall not exceed $20,000,000 in the aggregate."

     7. Update to Certain Schedules. Each of Schedule 1.2(B) and Schedule 7.8 to
the  Agreement  are hereby  amended  and  restated  as set forth on the  Revised
Schedule  1.2(B) and Revised  Schedule 7.8 attached to this  Amendment,  and the
Lenders hereby consent to such revised schedules and their substitution in place
of the original schedules to the Agreement.

     8.  Representations.  Each Borrower hereby  represents and warrants that it
has the corporate power and has been duly authorized by all requisite  corporate
action to execute  and deliver  this  Amendment  and to perform its  obligations
hereunder. Each Borrower hereby represents and warrants that no Default or Event
of Default  exists under the  Agreement or shall result from the  execution  and
delivery of this Amendment.

     9. Force and Effect.  Each Lender and each Borrower reconfirms and ratifies
the Agreement and all Other Documents executed in connection therewith except to
the extent any such documents are expressly modified by this Amendment, and each
Borrower confirms that all such documents have remained in full force and effect
since the date of their execution.

     10.  Governing Law. This  Amendment  shall be deemed to be a contract under
the laws of the  Commonwealth  of  Pennsylvania  and for all  purposes  shall be
governed by and construed  and enforced in accordance  with the internal laws of
the  Commonwealth  of  Pennsylvania  without  regard  to its  conflict  of  laws
principles.

     11.  Counterparts.  This Amendment may be signed by telecopy or original in
any number of counterparts,  each of which shall be deemed an original,  but all
of which together shall constitute one and the same instrument.

     12.  Effective  Date.  This Amendment shall be effective upon the execution
and delivery to the Agent of this Amendment by the Borrowers and the Lenders.


                            [SIGNATURE PAGES FOLLOW]



            [SIGNATURE PAGE 1 OF 2 TO THIRD AMENDMENT TO AMENDED AND
               RESTATED REVOLVING CREDIT AND SECURITY AGREEMENT]

     Intending  to be legally  bound,  each of the parties has signed this Third
Amendment to Amended and Restated  Revolving Credit and Security Agreement as of
the day and year first above written.



ATTEST:                                    L. B. FOSTER COMPANY



                                           By:/s/ David J. Russo          [Seal]
- --------------------------------              ----------------------------------
                                           Name:   David J. Russo
                                           Title:  Sr. V.P., Treasurer & CFO


ATTEST:                                    CXT INCORPORATED



                                           By:/s/ David J. Russo          [Seal]
- --------------------------------              ----------------------------------
                                           Name:   David J. Russo
                                           Title:  Sr. V.P., Treasurer and CFO


ATTEST:                                    NATMAYA, INC.



                                           By:/s/ Judith J. Scarborough   [Seal]
- --------------------------------              ----------------------------------
                                           Name:   Judith J. Scarborough
                                           Title:  President


ATTEST:                                    FOSMART, INC.



                                           By:/s/ Judith J. Scarborough   [Seal]
- --------------------------------              ----------------------------------
                                           Name:   Judith J. Scarborough
                                           Title:  President





            [SIGNATURE PAGE 2 OF 2 TO THIRD AMENDMENT TO AMENDED AND
               RESTATED REVOLVING CREDIT AND SECURITY AGREEMENT]




                                           PNC BANK, NATIONAL ASSOCIATION, a
                                           national banking association, as
                                           Lender and as Agent



                                           By:/s/ Richard F. Juse, Jr.
                                              ----------------------------------
                                           Name:   Richard F. Muse, Jr.
                                           Title:  Sr. Vice President


                                           LASALLE BANK NATIONAL ASSOCIATION


                                           By:/s/ Robert W. Hart
                                              ----------------------------------
                                           Name:   Robert W. Hart
                                           Title:  Senior Vice President


                                           FIRST COMMONWEALTH BANK


                                           By:/s/ C. Forrest Teft
                                              ----------------------------------
                                           Name:   C. Forrest Tefft
                                           Title:  Senior Vice President






L.B. Foster Company and Subsidiaries                                                 Schedule 1.2(B)  - Permitted Encumbrances
Other Debt
As of 12/31/06

Other Debt-Capital Leases                                                                       Current       L/T
Subledger      Lessor                         Collateral                 From        To        Acct 2126    Acct 2902      Total
- -------- --------------------------- --------------------------------- ---------- ---------- ------------ ------------ -------------

                                                                                                  

   242  City of Hillsboro            Hillsboro Land and Building        3/1/2002  2/29/2012    46,884.00    244,645.00    291,529.00
        Lasalle National Leasing
   245  Corporation                  Forklift and Steamplant           11/1/2003  11/1/2008    14,805.00     11,703.00     26,508.00
   248  GE Capital                   Savin Copier                      9/14/2004  1/13/2007       223.00          0.00        223.00
        Lasalle National Leasing
   249  Corporation                  Old Grand Island Equipment         3/1/2005  2/28/2009   323,685.00    375,607.00    699,292.00
   250  Banc of America Leasing Corp New Grand Island Equipment #1      1/5/2006  12/5/2010 1,081,610.00  3,694,029.00  4,775,639.00
   251  Leaf Financial Corp          Phone Systems in Houston Facility 2/28/2006  2/28/2008     4,676.00        419.00      5,095.00
   252  Citizens Asset Finance       Equipment at Pueblo ARP Facility   7/1/2006   2/1/2011   311,067.00  1,166,334.00  1,477,401.00
   253  Banc of America Leasing Corp New Grand Island Equipment #2      7/1/2006   1/1/2012   178,308.00    624,027.00    802,335.00
   254  Xerox                        Headquarters Copy Machine        10/23/2005 10/22/2009     4,385.00      8,703.00     13,088.00
   255  Xerox                        Headquarters Copy Machine        10/17/2005 10/16/2009     3,428.00      7,669.00     11,097.00
   256  Xerox                        Headquarters Copy Machine        10/17/2005 10/16/2009     3,933.00      8,738.00     12,671.00
        LaSalle National Leasing
   257  Corporation                  Tucson, AZ Facility Equipment      1/1/2007  6/30/2012   938,950.00  5,880,656.00  6,819,606.00

Subtotal Other Debt-Capital Leases                                                          2,911,954.00 12,022,530.00 14,934,484.00
                                                                                            ============ ============= =============

Other Debt-non Capital Leases
        LaSalle National Leasing     Advances on Equipment at Tucson,
        Corporation                  AZ                                                       726,270.00          0.00    726,270.00
        Citizens Asset Finance -     Building and Property at Pueblo
        Mortgage                     ARP Facility                       2/13/2006   3/1/2011   91,298.00    588,217.00    679,515.00
        PEDFA                        Portion of Bedford Expansion       4/30/2002  3/31/2012   27,083.00    331,250.00    358,333.00
        Massachusetts Industrial
        Finance Agency               Precise asset acquisition          3/20/1998   3/1/2013        0.00  2,045,000.00  2,045,000.00
        MELF(Machinery and
        Equipment Loan Fund)         Portion of Gruelich Asset Acq       8/1/2002   7/1/2009   75,109.00    124,826.00    199,935.00
                                                                                            ------------ ------------- -------------

Subtotal-Other Debt-non Capital Leases                                                        919,760.00  3,089,293.00  4,009,053.00
                                                                                            ============ ============= =============

Grand Total-Other Debt                                                                      3,831,714.00 15,111,823.00 18,943,537.00
                                                                                            ============ ============= =============









                               L.B. Foster Company
                    REVISED SCHEDULE 7.8 - Other Indebteness
                                 As of 12/31/06

Other Debt-Capital Leases                                                                     Current        L/T
Subledger    Lessor                          Collateral                  From        To       Acct 2126    Acct 2902      Total
- -------- --------------------------- --------------------------------- ---------- ---------- ------------ ------------ -------------
                                                                                                  


   242  City of Hillsboro            Hillsboro Land and Building        3/1/2002  2/29/2012    46,884.00    244,645.00    291,529.00
        Lasalle National Leasing
   245  Corporation                  Forklift and Steamplant           11/1/2003  11/1/2008    14,805.00     11,703.00     26,508.00
   248  GE Capital                   Savin Copier                      9/14/2004  1/13/2007       223.00          0.00        223.00
        Lasalle National Leasing
   249  Corporation                  Old Grand Island Equipment         3/1/2005  2/28/2009   323,685.00    375,607.00    699,292.00
   250  Banc of America Leasing Corp New Grand Island Equipment #1      1/5/2006  12/5/2010 1,081,610.00  3,694,029.00  4,775,639.00
   251  Leaf Financial Corp          Phone Systems in Houston Facility 2/28/2006  2/28/2008     4,676.00        419.00      5,095.00
   252  Citizens Asset Finance       Equipment at Pueblo ARP Facility   7/1/2006   2/1/2011   311,067.00  1,166,334.00  1,477,401.00
   253  Banc of America Leasing Corp New Grand Island Equipment #2      7/1/2006   1/1/2012   178,308.00    624,027.00    802,335.00
   254  Xerox                        Headquarters Copy Machine        10/23/2005 10/22/2009     4,385.00      8,703.00     13,088.00
   255  Xerox                        Headquarters Copy Machine        10/17/2005 10/16/2009     3,428.00      7,669.00     11,097.00
   256  Xerox                        Headquarters Copy Machine        10/17/2005 10/16/2009     3,933.00      8,738.00     12,671.00
        LaSalle National Leasing
   257  Corporation                  Tucson, AZ Facility Equipment      1/1/2007  6/30/2012   938,950.00  5,880,656.00  6,819,606.00

Subtotal Other Debt-Capital Leases                                                          2,911,954.00 12,022,530.00 14,934,484.00
                                                                                            ============ ============= =============

Other Debt-non Capital Leases
        LaSalle National Leasing     Advances on Equipment at Tucson,
        Corporation                  AZ                                                       726,270.00          0.00    726,270.00
        Citizens Asset Finance       Building and Property at Pueblo
        Mortgage                     ARP Facility                      2/13/2006   3/1/2011    91,298.00    588,217.00    679,515.00
        PEDFA                        Portion of Bedford Expansion      4/30/2002  3/31/2012    27,083.00    331,250.00    358,333.00
        Massachusetts Industrial
        Finance Agency               Precise asset acquisition         3/20/1998   3/1/2013         0.00  2,045,000.00  2,045,000.00
        MELF(Machinery and
        Equipment Loan Fund)         Portion of Gruelich Asset Acq      8/1/2002   7/1/2009    75,109.00    124,826.00    199,935.00
                                                                                            ------------ ------------- -------------
Subtotal-Other Debt-non Capital Leases                                                        919,760.00  3,089,293.00  4,009,053.00
                                                                                            ============ ============= =============
Grand Total-Other Debt                                                                      3,831,714.00 15,111,823.00 18,943,537.00
                                                                                            ============ ============= =============