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


                                    FORM 8-A

                  REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(b) OR (g) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


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


      Pennsylvania                                 25-1324733
------------------------            --------------------------------------------
(State of incorporation                  (IRS Employer Identification No.)
    or organization)


   415 Holiday Drive, Pittsburgh, PA                               15220
----------------------------------------                       -------------
(Address of principal executive offices)                         (Zip code)



Securities to be registered pursuant to Section 12(b) of the Act:

                                      None
                                      ----

If this form relates to the  registration  of a class of securities  pursuant to
Section  12(b)  of  the  Exchange  Act  and is  effective  pursuant  to  General
Instruction A.(c), check the following box [ ].

If this form relates to the  registration  of a class of securities  pursuant to
Section  12(g)  of  the  Exchange  Act  and is  effective  pursuant  to  General
Instruction A.(d), check the following box [X].

Securities Act registration statement file number to which this form relates:

                                 Not Applicable
                                 --------------

Securities to be registered pursuant to Section 12(g) of the Act:


                          Common Stock Purchase Rights
                          ----------------------------
                                (Title of Class)








ITEM 1.  DESCRIPTION OF REGISTRANT'S SECURITIES TO BE REGISTERED.
-------  --------------------------------------------------------

     On October 24, 2006,  the Board of  Directors of L. B. Foster  Company (the
"Company")  declared a dividend  distribution  of one right (a "Right") for each
outstanding  share of the  Company's  Common  Stock,  par value  $0.01 per share
("Common Stock"),  to shareholders of record at the close of business on May 15,
2007.  Except as described below,  each Right,  when  exercisable,  entitles the
registered  holder to purchase  from the Company one share of Common  Stock at a
purchase price of $30.00 (the  "Purchase  Price"),  subject to  adjustment.  The
description  and terms of the  Rights are set forth in a Rights  Agreement  (the
"Rights  Agreement")  between the Company and  American  Stock  Transfer & Trust
Company,  as Rights Agent.  The following is a general  description  only and is
subject to the detailed terms and conditions of the Rights Agreement.  A copy of
the Rights Agreement,  including the form of Rights  Certificate and the Summary
of Rights to be provided to shareholders of the Company, is being filed with the
Securities and Exchange Commission as Exhibit 4B to this Registration  Statement
on Form 8-A and is incorporated herein by reference.

     Initially,  the Rights will be attached  to all Common  Stock  certificates
representing  shares then outstanding,  and no separate Rights Certificates will
be  distributed.   The  Rights  will  separate  from  the  Common  Stock  and  a
Distribution  Date will occur upon the earlier of (i) 10 days following a public
announcement  that a person or group of affiliated  or associated  persons other
than the Company,  its subsidiaries or any person receiving  newly-issued shares
of Common Stock  directly from the Company or indirectly  via an  underwriter in
connection  with a public  offering by the Company (an  "Acquiring  Person") has
acquired, or obtained the right to acquire,  beneficial ownership of 20% or more
of the outstanding  shares of Common Stock (the "Stock  Acquisition  Date"),  or
(ii) 10 business days following the  commencement  of a tender offer or exchange
offer that would result in a person or group beneficially  owning 20% or more of
such outstanding  shares of Common Stock.  Until the Distribution  Date, (i) the
Rights  will  be  evidenced  by  the  Common  Stock  certificates  and  will  be
transferred with and only with such Common Stock  certificates,  (ii) new Common
Stock   certificates   issued  after  May  15,  2007  will  contain  a  notation
incorporating  the Rights  Agreement by reference  and (iii) the  surrender  for
transfer of any  certificates for Common Stock will also constitute the transfer
of the Rights associated with the Common Stock represented by such certificates.

     The Rights are not exercisable  until the Distribution Date and will expire
at the close of  business  on October  24,  2016,  unless  earlier  redeemed  or
exchanged by the Company as described below (the "Expiration Date").

     As soon as practicable  after the Distribution  Date,  Rights  Certificates
will be mailed to  holders  of  record  of the  Common  Stock as of the close of
business  on  the  Distribution  Date  and,  thereafter,   the  separate  Rights
Certificates alone will represent the Rights.  Except as otherwise determined by
the  Board of  Directors,  only  shares  of  Common  Stock  issued  prior to the
Distribution Date will be issued with Rights.

     If any  person  becomes  an  Acquiring  Person  other  than  pursuant  to a
Qualifying Offer (as defined below), each holder of a Right will thereafter have
the right to receive, upon exercise, Common Stock (or, in certain circumstances,
cash,  property or other  securities of the Company) having a value equal to two
times  the  exercise  price of the  Right.  The  Rights  Agreement  contains  an
exemption for any issuance of Common Stock by the Company directly to any person
(for example,  in a private  placement or an acquisition by the Company in which
Common Stock is used as  consideration)  or  indirectly  via an  underwriter  in
connection  with a public  offering by the  Company,  even if that person  would
become the  beneficial  owner of 20% or more of the  outstanding  Common  Stock,
provided  that such  person does not  acquire  any  additional  shares of Common
Stock.  Notwithstanding  any of the  foregoing,  all Rights  that are, or (under
certain  circumstances  specified in the Rights  Agreement)  were,  beneficially
owned by any  Acquiring  Person will be null and void.  However,  Rights are not
exercisable in any event until such time as the Rights are no longer  redeemable
by the Company as set forth below.

     A  "Qualifying  Offer"  means a tender  offer  or  exchange  offer  for all
outstanding  shares of Common  Stock at a price  and on terms  determined  by at
least a majority of the  Continuing  Directors  (as  defined  below) who are not
officers or  employees  of the Company and who are not related (as  specified in
the Rights  Agreement) to the Person making such offer, to be fair to and in the
best interests of the Company and its shareholders.

     If at any time  following  the Stock  Acquisition  Date (i) the  Company is
acquired  in a merger or other  business  combination  transaction  in which the
Common  Stock is  changed  or  exchanged  or in  which  the  Company  is not the
surviving  corporation  (other than a merger that follows a Qualifying Offer and
satisfies  certain  other  requirements),  or (ii) 50% or more of the  Company's
assets or earning power is sold or  transferred,  each holder of a Right (except
Rights that have been  previously  voided as set forth above)  shall  thereafter
have the right to receive, upon exercise,  common stock of the acquiring company
having a value equal to two times the  exercise  price of the Right.  The events
set forth in this paragraph and in the second  preceding  paragraph are referred
to as the "Triggering Events."

     The  Purchase  Price  payable,  and the number of shares of Common Stock or
other securities or property  issuable,  upon exercise of the Rights are subject
to adjustment from time to time to prevent  dilution (i) in the event of a stock
dividend on, or a subdivision,  combination or  reclassification  of, the Common
Stock,  (ii) if  holders  of the  Common  Stock are  granted  certain  rights or
warrants to subscribe  for Common Stock or  convertible  securities at less than
the current market price of the Common Stock, or (iii) upon the  distribution to
holders of the Common Stock of evidences of  indebtedness  or assets  (excluding
regular  quarterly cash dividends) or of subscription  rights or warrants (other
than those referred to above).

     With  certain  exceptions,  no  adjustment  in the  Purchase  Price will be
required  until  cumulative  adjustments  amount to at least 1% of the  Purchase
Price. No fractional  shares will be issued and, in lieu thereof,  an adjustment
in cash will be made based on the market  price of the Common  Stock on the last
trading date prior to the date of exercise.

     At any time  until ten days  following  the  Stock  Acquisition  Date,  the
Company may redeem the Rights in whole,  but not in part, at a price of $.05 per
Right (payable in cash, Common Stock or other  consideration  deemed appropriate
by the Board of Directors).  Under certain circumstances set forth in the Rights
Agreement, the decision to redeem shall require the concurrence of a majority of
the Continuing Directors.  Immediately upon the action of the Board of Directors
ordering  redemption  of the Rights or at such other time as may be specified by
the Board when it orders redemption,  with, where required, the concurrence of a
majority of the  Continuing  Directors,  the Rights will  terminate and the only
right of the holders of Rights will be to receive the $.05 redemption price.

     The term "Continuing  Directors" means any member of the Board of Directors
of the  Company  who was a member  of the Board  prior to the Stock  Acquisition
Date, and any person who is subsequently  elected to the Board if such person is
recommended or approved by a majority of the Continuing Directors, but shall not
include an  Acquiring  Person,  or an  affiliate  or  associate  of an Acquiring
Person, or any representative of the foregoing entities.

     Until a Right is  exercised,  the  holder  thereof,  as such,  will have no
rights as a shareholder of the Company, including, without limitation, the right
to vote or to receive  dividends.  While the distribution of the Rights will not
be taxable to shareholders or to the Company,  shareholders may,  depending upon
the circumstances, recognize taxable income if the Rights become exercisable for
Common Stock (or other  consideration) of the Company or for common stock of the
acquiring company as set forth above.

     Other than those provisions relating to the principal economic terms of the
Rights,  any of the  provisions  of the Rights  Agreement  may be amended by the
Board of  Directors of the Company  prior to the  Distribution  Date.  After the
Distribution  Date, the Rights Agreement may be amended by the Board (in certain
circumstances,  with the  concurrence of the  Continuing  Directors) in order to
cure any ambiguity,  to make changes that do not adversely  affect the interests
of holders of Rights  (excluding the interests of any Acquiring  Person),  or to
shorten  or  lengthen  any time  period  under the Rights  Agreement;  provided,
however,  that no amendment to adjust the time period governing redemption shall
be made at a time when the Rights are not redeemable.

     As of October  24,  2006,  there  were  10,520,245  shares of Common  Stock
outstanding  and 727,000  shares of Common Stock  reserved  for  issuance  under
outstanding  options to purchase Common Stock.  Each outstanding share of Common
Stock at the close of  business  on May 15,  2007 will  receive  one  Right.  In
addition,  Rights  shall be issued in respect of all shares of Common Stock that
are issued (whether originally issued or from the Company's treasury) after that
date but prior to the earlier of the  Distribution  Date or the Expiration  Date
and, in certain  circumstances  as provided in the Rights  Agreement,  after the
Distribution Date.

Certain Anti-Takeover Effects
-----------------------------

     The Rights  approved by the Board are  designed to protect and maximize the
value of the  outstanding  equity  interests  in the  Company in the event of an
unsolicited  attempt by an acquiror to take over the Company,  in a manner or on
terms not  approved  by the Board of  Directors.  Takeover  attempts  frequently
include coercive  tactics to deprive a corporation's  Board of Directors and its
stockholders   of  any  real   opportunity  to  determine  the  destiny  of  the
corporation.  The Rights have been  declared by the Board in order to deter such
tactics,  including a gradual accumulation of shares in the open market of a 20%
or greater  position to be followed by a merger or a partial or two-tier  tender
offer  that does not treat all  shareholders  equally.  These  tactics  unfairly
pressure shareholders,  squeeze them out of their investment without giving them
any real choice and deprive them of the full value of their shares.

     The Rights are not  intended  to prevent a takeover of the Company and will
not do so. The Rights are not exercisable in the event of a Qualifying Offer, as
described  above.  The Rights may be  redeemed  by the Company at $.05 per Right
within ten days (or such later date as may be  determined  by a majority  of the
Continuing  Directors)  after the  accumulation  of 20% or more of the Company's
Common Stock by a single acquiror or group.  Accordingly,  the Rights should not
preclude any merger or business combination approved by the Board of Directors.

     Issuance of the Rights does not in any way weaken the financial strength of
the Company or interfere with its business plans. The issuance of the Rights has
no  immediate  dilutive  effect,  will not affect  reported  earnings per share,
should not be taxable to the Company or to its  shareholders and will not change
the way in which the Company's shares are presently traded.  The Company's Board
of Directors  believes that the Rights represent a sound and reasonable means of
addressing  the  complex  issues of  corporate  policy  created  by the  current
takeover environment.

     However,  the Rights may have the effect of  rendering  more  difficult  or
discouraging  an acquisition  of the Company deemed  undesirable by the Board of
Directors.  The Rights will cause substantial dilution to a person or group that
attempts  to acquire  the  Company on terms or in a manner not  approved  by the
Company's Board of Directors,  except pursuant to an offer  conditioned upon the
negation, purchase or redemption of the Rights.


ITEM 2   EXHIBITS
------   --------

     The  following  exhibit  is  filed  herewith  as part of this  registration
statement:


         4B       Rights Agreement, dated as of October 24, 2006, between L. B.
                  Foster Company and American Stock Transfer & Trust Company,
                  including the form of Rights Certificate and the Summary of
                  Rights attached thereto as Exhibits A and B, respectively.





                                    SIGNATURE

     Pursuant to the  requirements of Section 12 of the Securities  Exchange Act
of 1934, the registrant has duly caused this registration statement to be signed
on its behalf by the undersigned, thereto duly authorized.


                                           L.B. FOSTER COMPANY
                                           -------------------
                                           (Registrant)


Date:  October 27, 2006
                                           /s/ David J. Russo
                                           -------------------------------------
                                           David J. Russo
                                           Senior Vice President
                                           Chief Financial Officer and Treasurer



Exhibit Index
-------------



Exhibit Number                      Description
--------------                      -----------


4B                                  Rights Agreement, dated as of October 24,
                                    2006, between L. B. Foster Company and
                                    American Stock Transfer & Trust Company,
                                    including the form of Rights Certificate and
                                    the Summary of Rights attached thereto as
                                    Exhibits A and B.