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


                                    FORM 11-K

             FOR ANNUAL REPORTS OF EMPLOYEE STOCK PURCHASE, SAVINGS
               AND SIMILAR PLANS PURSUANT TO SECTION 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934


(Mark One)

[X] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF
1934.

For the fiscal year ended December 31, 2006.

                                       OR

[ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT
OF 1934.

For the transition period from ___________to_____________

Commission file number  0-10436.


                 L. B. Foster Company Voluntary Investment Plan
--------------------------------------------------------------------------------
                (Full title of the plan and the address of plan,
               if different from that of the issuer named below)


                              L. B. FOSTER COMPANY
                               415 Holiday Drive
                              Pittsburgh, PA 15222
--------------------------------------------------------------------------------
               (Name of issuer of the securities held pursuant to
          the plan and the address of its principal executive office)




 FINANCIAL STATEMENTS AND OTHER FINANCIAL INFORMATION

 L. B. Foster Company Voluntary Investment Plan
 December 31, 2006 and 2005, and the Year Ended December 31, 2006
 With Report of Independent Auditors



                              L. B. Foster Company
                            Voluntary Investment Plan

                              Financial Statements
                         and Other Financial Information

                           December 31, 2006 and 2005,
                      and the Year Ended December 31, 2006




                                    Contents

Report of Independent Registered Public Accounting Firm........................1

Financial Statements

Statements of Net Assets Available for Benefits................................2
Statement of Changes in Net Assets Available for Benefits......................3
Notes to Financial Statements..................................................4

Other Financial Information

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)................11





             REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


The Plan Administrator
L. B. Foster Company
Voluntary Investment Plan

We have audited the accompanying statements of net assets available for benefits
of the L. B. Foster Company  Voluntary  Investment  Plan as of December 31, 2006
and 2005,  and the  related  statement  of changes in net assets  available  for
benefits for the year ended December 31, 2006.  These  financial  statements are
the responsibility of the Plan's management. Our responsibility is to express an
opinion on these financial statements based on our audits.

We conducted our audits in accordance  with the standards of the Public  Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement.  We were not engaged to perform an
audit of the  Plan's  internal  control  over  financial  reporting.  Our audits
included  consideration of internal control over financial  reporting as a basis
for designing audit  procedures that are appropriate in the  circumstances,  but
not for the purpose of expressing an opinion on the  effectiveness of the Plan's
internal  control  over  financial  reporting.  Accordingly,  we express no such
opinion. An audit also includes examining,  on a test basis, evidence supporting
the  amounts  and  disclosures  in  the  financial  statements,   assessing  the
accounting  principles  used and significant  estimates made by management,  and
evaluating the overall  financial  statement  presentation.  We believe that our
audits provide a reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all  material  respects,  the net assets  available  for benefits of the Plan at
December  31,  2006 and 2005,  and the changes in its net assets  available  for
benefits for the year ended December 31, 2006, in conformity with U.S. generally
accepted accounting principles.

Our audits were performed for the purpose of forming an opinion on the financial
statements taken as a whole. The  accompanying  supplemental  schedule of assets
(held at end of year) as of  December  31,  2006 is  presented  for  purposes of
additional  analysis and is not a required part of the financial  statements but
is  supplementary  information  required by the  Department of Labor's Rules and
Regulations for Reporting and Disclosure  under the Employee  Retirement  Income
Security Act of 1974. This  supplemental  schedule is the  responsibility of the
Plan's management.  The supplemental schedule has been subjected to the auditing
procedures  applied  in our  audits  of the  financial  statements  and,  in our
opinion,  is fairly stated in all material respects in relation to the financial
statements taken as a whole.



                                                   /s/ Ernst & Young LLP


June 22, 2007



                              L. B. Foster Company
                            Voluntary Investment Plan

                 Statements of Net Assets Available for Benefits

                                                           December 31
                                                      2006               2005
                                                   -----------------------------
Assets
Investments, at fair value                         $39,141,654       $35,128,054
Participant loans                                      444,114           463,220
                                                   -----------       -----------
                                                    39,585,768        35,591,274

Receivables:
     Employee                                           82,093            88,418
     Employer                                        1,058,306           533,451
     Other                                               1,134               563
                                                   -----------       -----------
                                                     1,141,533           622,432


Net assets available for benefits,
     at fair value                                  40,727,301        36,213,706



Adjustment from fair value to
     contract value for investments in
     fully benefit-responsive
     investment contracts                               14,370            20,235
                                                   -----------       -----------
Net assets available for benefits                  $40,741,671       $36,233,941
                                                   ===========       ===========


See accompanying notes.



                              L. B. Foster Company
                            Voluntary Investment Plan

            Statement of Changes in Net Assets Available for Benefits

                          Year Ended December 31, 2006


Additions
Investment income:
     Interest and dividends                                          $ 3,357,460
     Net realized/unrealized appreciation
       in investment fair value                                        2,588,365
                                                                     -----------
Total investment income                                                5,945,825


Contributions:
     Employee                                                          1,361,494
     Rollover                                                            422,076
     Employer                                                          1,569,083
                                                                     -----------
Total contributions                                                    3,352,653
                                                                     -----------
                                                                       9,298,478


Deductions
Benefit payments                                                       4,790,748
                                                                     -----------
                                                                       4,790,748
                                                                     -----------


Increase in net assets available for benefits                          4,507,730
Net assets available for benefits, beginning of year                  36,233,941
                                                                     -----------
Net assets available for benefits, end of year                       $40,741,671
                                                                     ===========

See accompanying notes.



                              L. B. Foster Company
                            Voluntary Investment Plan

                          Notes to Financial Statements

                           December 31, 2006 and 2005


1. Description of Plan

The following brief description of the L. B. Foster Company Voluntary Investment
Plan (the Plan) as amended  effective  January 1, 1999,  is provided for general
information  purposes  only.  Participants  should  refer  to the  summary  plan
description for more complete information.

General

The Plan is a  defined  contribution  plan  extended  to all  eligible  salaried
employees of L. B. Foster Company (the Company) who have attained age 18. The L.
B. Foster Company Employee  Benefits Policy and Review  Committee,  appointed by
the  Board  of  Directors  of the  Company,  collectively  serves  as  the  plan
administrator.  The Plan is subject to the provisions of the Employee Retirement
Income Security Act of 1974 (ERISA) as amended.

Contributions

Contributions  under the Plan are made by both the participants and the Company.
A participant  who elects to make pretax  contributions  of at least the maximum
amount subject to company  matching can also elect to make additional  voluntary
contributions on an after-tax basis. Employees may contribute up to 41% of their
annual  compensation  subject to Internal Revenue Code limitations.  There is no
limit on aggregate pretax and after-tax contributions. Participant contributions
and employer matching  contributions are invested in accordance with participant
elections. In the event that a participant does not make an investment election,
contributions  are invested in the Fidelity  Freedom funds until such time as an
election is made by the participant.  The participant may transfer contributions
defaulted  to these  funds into other  investment  options at the  participant's
discretion.

Beginning the first of the month following 12 months of employment,  the Company
provides a 50% match of the participant's  primary  contribution on the first 4%
to 6% of annual compensation, based on years of service, as defined by the Plan.
Beginning the first of the month following 12 months of employment,  the Company
contributes  a  fixed  amount  equal  to  1%  of  eligible   employees'   annual
compensation  regardless  of whether the employee  elects to  contribute  to the
Plan. Company contributions may be reduced by forfeitures that accumulate.

The Plan also requires an additional  matching  employer  contribution  of up to
$.50 for each $1.00 of eligible pretax  contributions based on a target ratio of
the  Company's  annual  pretax  income  to  equity as  defined  in the Plan.  An
additional matching employer  contribution of $381,000 was made in 2006. No such
contributions were made in 2005.



1. Description of Plan (continued)

The Company, upon resolution of the Board of Directors, may make a discretionary
additional contribution of an amount out of, but not in excess of, the Company's
current or  accumulated  profits.  Discretionary  contributions  of $626,000 and
$494,000  were  approved  for  2006  and  2005,  respectively.   Forfeitures  of
discretionary  contributions are reallocated to the Plan's  remaining,  eligible
participants.  The  Company's  matching  contributions  may  be  reduced  by any
forfeitures  that  accumulate from  terminations of participants  with nonvested
employer  matching  contributions.  No  forfeitures  were utilized  during 2006.
Forfeitures  totaling  $300 were  utilized to offset  contributions  in 2005. At
December  31,  2006  and  2005,  forfeitures   approximating  $4,800  and  $400,
respectively, were available to reduce future company contributions.

Vesting

A  participant's  vested interest in the Plan on any date is equal to the sum of
the values of (a) that portion of the participant's  account attributable to the
participant's  contributions and (b) that portion of the  participant's  account
attributable to the Company's contributions multiplied by the applicable vesting
percentage plus or minus related earnings (losses). Participants that are active
as of January 1, 2002, or later are 100% vested in the  Company's  contributions
after three years of eligible  service or after  attaining age 65.  Participants
that are inactive as of or terminated  prior to January 1, 2002, are 100% vested
in the  Company's  contributions  after five years of eligible  service or after
attaining age 65.

Notwithstanding  the above, a participant who terminates from the Plan by reason
of  retirement,  disability,  or  death  is fully  vested  in their  participant
account.

Distributions

Normal  retirement  age is 65. Early  retirement  age is 55,  provided  that the
participant has at least five years of service.  In addition,  a participant may
obtain an early retirement  distribution prior to reaching age 55, provided that
the participant  will turn 55 in the year the  distribution  occurs and that the
participant has at least five years of service.

As provided by the Plan, the  distribution to which a participant is entitled by
reason of normal, early, late, or disability  retirement,  death, or termination
of  employment  may be made in the form of direct  rollover,  annuity,  cash, or
partly in cash and  partly as an  annuity.  The amount of such  distribution  is
equal to the participant's vested account balance on the valuation date.



1. Description of Plan (continued)

Withdrawals

Under  the  Plan,  a  participant  may elect to  withdraw  voluntary,  after-tax
contributions  made to the Plan prior to January 1, 1987.  Such  withdrawals are
subject to a $1,000  minimum.  In the event of extreme  hardship  and subject to
certain  restrictions and  limitations,  a participant may withdraw their vested
interest in the portion of their account  attributable to matching,  fixed,  and
discretionary contributions, and related earnings.

Participants' Accounts

Each  participant's  account  is  credited  with the  participant's  pretax  and
voluntary   contributions,   the   participant's   allocable  share  of  company
contributions,  and related earnings of the funds. Participants' accounts may be
invested in 10% increments into any of the mutual funds available under the Plan
at the direction of the participant.

Loans

A  participant  may  obtain a loan from the  vested  portion  of their  account,
subject to spousal  consent,  if  applicable.  The loan  proceeds  (subject to a
minimum of $1,000 and a maximum of $50,000) are deducted from the  participant's
account and are repaid by means of payroll deductions.  Loans are required to be
repaid  within 60 months from the date on which the loan is  originally  granted
and may be prepaid early without  penalty.  The repayment period for a loan that
is obtained for purchasing a primary residence may be as long as 360 months. The
loan carries an interest rate computed at the prime rate plus 0.5%. The interest
rate is computed  on the date the loan is  requested  and remains  fixed for the
full term of the loan.

Plan Termination

Although it has not  expressed any intention to do so, the Company has the right
under the Plan to discontinue its contributions at any time and to terminate the
Plan  subject  to the  provisions  of  ERISA.  Should  the  Plan be  terminated,
participants  will become fully vested in their accounts,  and the assets of the
Plan would be distributed to the participants  based on their individual account
balances as determined under the plan provisions.



2. Summary of Significant Accounting Policies

Valuation of Investments

Mutual fund values are based on the underlying investments in securities. Mutual
fund  securities  traded on security  exchanges  are valued at the latest quoted
sales price.  Securities traded on a national  securities exchange are valued at
the last  reported  sales price on the last  business day of the plan year.  The
contract  value of  participation  units owned in the  collective  trust fund is
based on quoted  redemption  values,  as determined by the Trustee,  on the last
business day of the plan year.  The fair value of  participation  units owned by
the  collective  trust  fund is  determined  based on the  present  value of the
underlying  contracts'  cash  flows,  discounted  at  current  market  rates for
investments of similar quality and duration.  Loans receivable from participants
are valued at cost which approximates fair value.

Realized  gain or loss  includes  recognized  gains  and  losses  on the sale of
investments. Unrealized appreciation or depreciation represents changes in value
from original  cost.  Dividend  income is recorded on the  ex-dividend  date and
interest income is accrued as earned.

As  described  above,  the assets of the Plan are  concentrated  in mutual funds
consisting  primarily of stocks and bonds.  Realization of amounts  disclosed as
net assets available for benefits is dependent on the results of these markets.

Basis of Accounting

The  financial  statements  of the Plan are  maintained  on the  accrual  basis.
Contributions  receivable  are recorded among the available  investment  options
based upon the participants'  aggregate investment  allocations in effect at the
end of the plan year.

Use of Estimates

The  preparation  of financial  statements  in  accordance  with U.S.  generally
accepted accounting principles requires management to make estimates that affect
the amounts reported in the financial  statements and accompanying notes. Actual
results could differ from those estimates.

Expenses

The  Company,  as provided  by the Plan,  pays  expenses  of the Plan.  Expenses
incurred  to  establish  and  maintain  a loan  are  charged  to the  applicable
participant.



2. Summary of Significant Accounting Policies (continued)

New Accounting Pronouncement

In December 2005, the Financial  Accounting  Standards  Board (FASB) issued FASB
Staff Position AAG INV-1 and SOP 94-4-1,  Reporting of Fully  Benefit-Responsive
Investment  Contracts Held by Certain Investment  Companies Subject to the AICPA
Investment Company Guide and Defined-Contribution Health and Welfare and Pension
Plans  (the FSP).  The FSP  defines  the  circumstances  in which an  investment
contract is considered fully  benefit-responsive  and provides certain reporting
and disclosure requirements for fully benefit-responsive investment contracts in
defined  contribution  health and  welfare  and  pension  plans.  The  financial
statement  presentation  and disclosure  provisions of the FSP are effective for
financial  statements  issued for annual periods ending after December 15, 2006,
and are required to be applied  retroactively to all prior periods presented for
comparative  purposes.  The Plan has  adopted  the  provisions  of the FSP as of
December 31, 2006.

As required by the FSP, investments in the accompanying Statements of Net Assets
Available for Benefits  include fully  benefit-responsive  investment  contracts
recognized  at fair value.  AICPA  Statement  of Position  94-4-1,  Reporting of
Investment  Contracts  Held by Health  and  Welfare  Benefit  Plans and  Defined
Contribution  Pension  Plans,  as  amended,  requires  fully  benefit-responsive
investment contracts to be reported at fair value in the Plan's Statement of Net
Assets  Available for Benefits with a corresponding  adjustment to reflect these
investments at contract  value.  The  requirements  of the FSP have been applied
retroactively  to the  Statement  of Net Assets  Available  for  Benefits  as of
December 31, 2005, presented for comparative  purposes.  Adoption of the FSP had
no effect on the  Statement of Changes in Net Assets  Available for Benefits for
any period presented.

3. Investments

Profit-sharing  contributions  are directed into the L. B. Foster  Company Stock
Fund. Participants may subsequently transfer  profit-sharing  contributions into
other plan funds at their  discretion.  The L. B. Foster Company Stock Fund is a
unitized stock fund comprised of a 95% to 99% investment in L. B. Foster Company
common stock with the  remaining  1% to 5% invested in a  short-term  investment
fund. As a result,  participant  accounts  receive units of participation in the
fund rather than common shares.



3. Investments (continued)

For the  year  ended  December  31,  2006,  the  Plan's  investments  (including
investments bought, sold, and held during the year) appreciated (depreciated) in
value as follows:

                                                                   Net Realized/
                                                      Fair          Unrealized
                                                     Market        Appreciation
                                                     Value        (Depreciation)
                                               ---------------------------------
Fidelity investments:
  Magellan Fund                                 $  3,934,234        $(665,164)
  Equity Income Fund                               2,658,469          279,362
  Growth and Income Fund                           3,663,699         (266,054)
  Government Income Fund                           1,201,297          (13,240)
  Blue Chip Fund                                     365,075           10,038
  Asset Manager Fund                               1,040,373            2,250
  Low Price Stock Fund                             2,192,096          139,065
  Small Cap Stock Fund                             1,049,586           24,809
  Freedom Income Fund                                110,217            1,212
  Freedom 2000                                        27,839            1,818
  Freedom 2010                                       934,726           33,305
  Freedom 2020                                     1,518,605           72,226
  Freedom 2030                                       540,554           29,217
  Freedom 2040                                       324,377           17,226
  Managed Income Portfolio                         1,429,775                -
  Retirement Government Money Market Fund          2,393,482                -
  Spartan U.S. Equity Index Fund                   3,311,564          389,718
Credit Suisse Emerging Growth Fund                   534,849            4,803
PIMCO Total Return Fund                            1,448,064          (18,961)
Allianz NFJ Small Cap Value Fund                   1,012,470           33,548
MSI International Equity Fund                      3,336,370           22,089
L. B. Foster Company Stock Fund                    6,113,933        2,491,098
                                               ---------------------------------
                                               $  39,141,654       $2,588,365
                                               =================================



3. Investments (continued)

The fair value of  investments  representing  5% or more of the Plan's assets at
December 31, 2006 and 2005, is as follows:

                                                      2006            2005
                                               ------------------------------

Fidelity investments:
  Magellan Fund                                  $  3,934,234    $  3,863,455
  Equity Income Fund                                2,658,469       2,933,547
  Growth and Income Fund                            3,663,699       3,797,262
  Low Price Stock Fund                              2,192,096       1,827,715
  Retirement Government Money Market Fund           2,393,482       2,198,890
  Spartan U.S. Equity Index Fund                    3,311,564       2,897,159
MSI International Equity Fund                       3,336,370       2,930,920
L. B. Foster Company Stock Fund                     6,113,933       3,511,840

4. Income Tax Status

The Plan has received a determination  letter from the Internal  Revenue Service
(IRS) dated July 30,  2002,  stating that the Plan is  qualified  under  Section
401(a) of the Internal Revenue Code (the Code) and, therefore, the related trust
is exempt  from  taxation.  Once  qualified,  the Plan is required to operate in
conformity  with the Code to maintain  its  qualification.  The Plan was amended
subsequent to the IRS determination  letter. The plan sponsor has indicated that
it will take the necessary  steps,  if any, to bring the Plan's  operations into
compliance with the Code.

5. Transactions With Parties in Interest

Certain  trustee,  accounting,  and  administrative  expenses  relating  to  the
maintenance of participant records and the Plan's administration are absorbed by
the Company.



6. Reconciliation between Financial Statements and Form 5500

The following is a  reconciliation  of net assets available for benefits per the
financial statements to the Form 5500 at December 31, 2006 and 2005:

                                                          2006          2005
                                                      ------------  ------------

 Net assets available for benefits
  per the financial statements                        $40,741,671   $36,233,941
 Adjustment to report collective
  trust fund at fair value                                (14,370)      (20,235)
                                                      ------------  ------------
Net assets available for benefits per the Form 5500   $40,727,301   $36,213,706
                                                      ============  ============

The following is a  reconciliation  of net  realized/unrealized  appreciation in
investment fair value per the financial statements to the Form 5500 for the year
ended December 31, 2006:

 Net realized/unrealized appreciation
  per the financial statements                                       $2,588,365
 Adjustment to report collective trust
  fund at fair value                                                    (14,370)
                                                                     -----------
Net assets available for benefits per the Form 5500                  $2,573,995
                                                                     ===========

7. Subsequent Event - Plan Merger

Effective March 1, 2007, the Company merged the L. B. Foster Company  Retirement
Savings Plan into the Plan. Upon completion, the L. B. Foster Company Retirement
Savings  Plan has been  terminated.  The  consolidated  plan is the L. B. Foster
Company 401(k) and Profit Sharing Plan. Certain operational provisions were also
amended as a result of this Plan Merger.









                           Other Financial Information











                              L. B. Foster Company
                            Voluntary Investment Plan

                            EIN #25-1324733 Plan #201

                    Schedule H, Line 4i - Schedule of Assets
                              (Held at End of Year)

                                December 31, 2006

Identity of Issue, Borrower,                                                              Shares                         Fair Market
 Lessor, or Similar Party                      Description of Investment                   Held                            Value
------------------------------------------------------------------------------------------------------------------------------------

                                                                                                              

Fidelity Investments*:
  Magellan Fund                                Equities                                    43,948                      $   3,934,234
  Equity Income Fund                           Equities                                    45,405                          2,658,469
  Growth and Income Fund                       Equities                                   117,615                          3,663,699
  Government Income Fund                       Government obligations                     119,651                          1,201,297
  Blue Chip Fund                               Equities                                     8,239                            365,075
  Asset Manager Fund                           Equities, money market, bonds               64,579                          1,040,373
  Low Price Stock Fund                         Equities                                    50,347                          2,192,096
  Small Cap Stock Fund                         Equities                                    55,312                          1,049,586
  Freedom Income Fund                          Equity funds, fixed income funds             9,551                            110,217
  Freedom 2000                                 Equity funds, fixed income funds             2,234                             27,839
  Freedom 2010                                 Equity funds, fixed income funds            63,935                            934,726
  Freedom 2020                                 Equity funds, fixed income funds            97,785                          1,518,605
  Freedom 2030                                 Equity funds, fixed income funds            33,721                            540,554
  Freedom 2040                                 Equity funds, fixed income funds            34,217                            324,377
  Managed Income Portfolio                     Guaranteed investment contracts          1,444,145                          1,429,775
  Retirement Government Money Market Fund      Government obligations, money
                                                    market securities                   2,393,482                          2,393,482
  Spartan U.S. Equity Index Fund               Equities                                    65,994                          3,311,564
Credit Suisse Emerging Growth Fund             Equities                                    15,805                            534,849
PIMCO Total Return Fund                        Fixed income securities                    139,505                          1,448,064
Allianz NFJ Small Cap Value Fund               Equities                                    32,399                          1,012,470
MSI International Equity Fund                  Equities                                   163,548                          3,336,370
                                                                                                                       -------------
Total mutual funds                                                                                                        33,027,721

L. B. Foster Company Stock Fund                Interest-bearing cash                      260,683                            260,683
                                               Common stock                               225,907                          5,853,250
                                                                                                                       -------------
                                                                                                                           6,113,933

Outstanding participant loans                  Participant loans, interest rates
                                                  ranging from 4.5% to 10.5%,
                                                  various maturities ranging
                                                  from 2 to 30 years                                                         444,114
                                                                                                                       -------------
                                                                                                                       $  39,585,768
                                                                                                                       =============



*Party in interest





                                 EXHIBIT INDEX

Exhibit 23.1            Consent of Independent Registered Public Accounting Firm



                                    SIGNATURE

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
trustees (or other persons who administer  the employee  benefit plan) have duly
caused this annual report to be signed on its behalf by the undersigned hereunto
duly authorized.

                                                L.B. Foster Company
                                                Voluntary Investment Plan
                                                -----------------------------
                                                (Name of Plan)


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