Exhibit 4.0.4






                               SECOND AMENDMENT TO

                     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)





                                January 28, 2005





           SECOND AMENDMENT TO REVOLVING CREDIT AND SECURITY AGREEMENT


     THIS SECOND  AMENDMENT TO  REVOLVING  CREDIT AND  SECURITY  AGREEMENT  (the
"Amendment")  is made as of January 28, 2005, 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
Revolving  Credit and  Security  Agreement  dated as of September  26, 2002,  as
amended by a First Amendment  thereto dated as of September 8, 2003, (as amended
from time to time, the "Agreement").

     WHEREAS, the Borrowers have requested the Lenders to amend the agreement in
connection  with  certain  transactions  relating to Marquo Inc., a supplier and
contractor to the Geotech Division of Foster.

     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 new  definition is hereby  inserted in Section 1.2 of
the Agreement in alphabetical order:

          "Marquo" shall mean Marquo Inc., a corporation  incorporated under the
     laws of the state of Colorado.



          3.  Section 2.9 of the  Agreement  is hereby  amended and  restated as
     follows:

         "2.9     Letters of Credit and Acceptances.
                  ----------------------------------

         Subject to the terms and conditions hereof, Agent shall (a) issue or
cause the issuance of standby and documentary (trade) Letters of Credit
("Letters of Credit") on behalf of any Borrower, or (b) accept, or cause to be
accepted Acceptances; provided, however, that Agent will not be required to
issue or cause to be issued any Letters of Credit or accept or cause to be
accepted any Acceptances to the extent that the face amount of such Letters of
Credit and Acceptances would then cause the sum of (i) the outstanding Revolving
Advances plus (ii) outstanding Letters of Credit plus (iii) outstanding
Acceptances to exceed the lesser of (x) the Maximum Revolving Advance Amount or
(y) the Formula Amount. The maximum amount of outstanding Letters of Credit and
Acceptances shall not exceed $15,000,000 in the aggregate at any time. All
disbursements or payments related to Letters of Credit and Acceptances shall be
deemed to be Domestic Rate Loans consisting of Revolving Advances and shall bear
interest at the Revolving Interest Rate for Domestic Rate Loans; Letters of
Credit that have not been drawn upon shall not bear interest. That certain
Irrevocable Letter of Credit No. S247285NJY dated April 10, 2002, in the amount
of $409,863.01 issued for the benefit of J. P. Morgan Trust Company, National
Association, as Trustee, shall from and after the Closing Date be deemed to be
issued pursuant to this Agreement, including without limitation, Sections 2.9,
2.10, 2.11 and 3.2, and this Agreement shall amend and restate the provisions of
that certain Reimbursement, Credit and Security Agreement dated as of April 1,
2002, between Foster and PNC with respect to such Letter of Credit."

          4.  Section 7.5 of the  Agreement  is hereby  amended and  restated as
     follows:

         "7.5     Loans.

         Make advances, loans or extensions of credit to any Person, including
without limitation, any Parent, Subsidiary or Affiliate except with respect to
(a) the extension of commercial trade credit in connection with the sale of
Inventory in the ordinary course of its business and (b) loans advanced to its
employees in the ordinary course of business not to exceed the aggregate amount
of $1,000,000 at any time outstanding, (c) loans advanced by one Borrower to
another Borrower, (d) advances made by a Borrower to RP&F, provided however, (i)
advances to RP&F shall be limited to the amounts permitted in Section 7.1(b)
plus an additional amount not in excess of $250,000 in the aggregate at any one
time outstanding and (ii) advances to RP&F shall be made on or before December
31, 2003, and (e) loans made by Foster to Marquo; provided however, such loans
to Marquo shall not exceed $1,500,000 in the aggregate at any one time
outstanding."

          5.  Amendment  Fee.  The  Borrowers  shall pay to the  Agent,  for the
     ratable benefit of the Lenders,  an amendment fee in the amount of $12,000,
     which fee shall be deemed to be earned as of the date hereof.

          6.  Representations.  The Borrowers each represent and warrant 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.  The
     Borrowers  each  represent  and warrant that no Default or Event of Default
     exists under the Credit  Agreement or shall result from the  execution  and
     delivery of this Amendment.

          7. 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.

          8.  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.

          9.  Counterparts;  Effective  Date.  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. This Amendment shall become effective as of the date first
     above  written upon its  execution  and delivery by the  Borrowers  and the
     Required  Lenders and payment of the amendment fee required under Section 6
     hereof.

                            [SIGNATURE PAGES FOLLOW]





                  [SIGNATURE PAGE 1 OF 2 TO SECOND AMENDMENT TO
                    REVOLVING CREDIT AND SECURITY AGREEMENT]

         Intending to be legally bound, each of the parties has signed this
Second Amendment to 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: Senior Vice President and CFO
                                  --------------------------------------------


ATTEST:                    CXT INCORPORATED



                           By:/s/ David J. Russo                        [Seal]
- ---------------------        -------------------------------------------------
                           Name: David J. Russo
                                 ---------------------------------------------
                           Title: Senior Vice President 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
                                ----------------------------------------------






                                      - 2 -

                  [SIGNATURE PAGE 2 OF 2 TO SECOND AMENDMENT TO
                    REVOLVING CREDIT AND SECURITY AGREEMENT]

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



                             By: /s/ James M. Steffy
                               ---------------------------------------------
                             Name: James M. Steffy
                                   -----------------------------------------
                             Title: Vice President
                                    ----------------------------------------


                             LASALLE BANK NATIONAL ASSOCIATION


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


                             FIRST COMMONWEALTH BANK


                             By: /s/Paul J. Oris
                               ---------------------------------------------
                             Name: Paul J. Oris
                                   -----------------------------------------
                             Title: V.P.
                                  ------------------------------------------