UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
     Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934


 Date of Report (Date of earliest event          July 27, 2007  (July 27, 2007)
 reported)                                       -------------------------------


                              L. B. Foster Company
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


       Pennsylvania                  000-10436                   25-1324733
--------------------------------------------------------------------------------
(State or other jurisdiction        (Commission               (I.R.S. Employer
   of incorporation)                File Number)             Identification No.)


415 Holiday Drive, Pittsburgh, Pennsylvania                            15220
--------------------------------------------------------------------------------
 (Address of principal executive offices)                           (Zip Code)


 Registrant's telephone number, including area code     (412) 928-3417
                                                        ------------------------


                                      None
--------------------------------------------------------------------------------
         (Former name or former address, if changed since last report.)


Check  the  appropriate  box  below  if the  Form  8-K  filing  is  intended  to
simultaneously  satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):


[ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)


[ ] Soliciting  material  pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)


[ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))


[ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))



Item 1.01         Entry Into a Material Definitive Agreement

On July 27,  2007,  L. B. Foster  Company and certain of its  subsidiaries  (the
"Borrowers") executed the Fourth Amendment to the Amended and Restated Revolving
Credit  Agreement  with PNC Bank,  National  Association,  as a lender and agent
bank,  LaSalle Bank National  Association,  as a lender,  and First Commonwealth
Bank, as a lender.  The Amendment is attached hereto and incorporated  herein by
reference.  The amendment  provides for an increase in the banks' revolving line
commitment  from  $75  million  to  $90  million.  Additionally,  the  amendment
establishes a $20 million term loan that will be immediately applied to pay down
existing  drawings on the revolving  line.  The term loan will be amortized over
seven years with a balloon payment on outstanding  principal due at the maturity
of the loan agreement, May 5, 2011. If average revolver availability should fall
below $10 million over a 30-day period, the loans become immediately  secured by
a lien on the  Borrowers'  equipment  that is not  encumbered  by  other  liens.
Borrowers' are obligated to satisfy a fixed charge coverage ratio of 1.05 to 1.


Item 9.01         Financial Statements and Exhibits


(c)      Exhibits

10.0.4       Fourth Amendment dated July 27, 2007 to Revolving Credit and
             Security Agreement



                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.



                                           L.B. Foster Company
                                           -------------------
                                           (Registrant)


Date:  July 27, 2007
       -------------
                                           /s/David J. Russo
                                           -----------------
                                           David J. Russo
                                           Senior Vice President,
                                           Chief Financial Officer and Treasurer



                                  EXHIBIT INDEX
                                  -------------


10.0.4       Fourth Amendment dated July 27, 2007 to Revolving Credit and
             Security Agreement.