<SEC-DOCUMENT>0001567619-21-018600.txt : 20211022
<SEC-HEADER>0001567619-21-018600.hdr.sgml : 20211022
<ACCEPTANCE-DATETIME>20211022150837
ACCESSION NUMBER:		0001567619-21-018600
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20211015
FILED AS OF DATE:		20211022
DATE AS OF CHANGE:		20211022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ness Robert
		CENTRAL INDEX KEY:			0001888828

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10436
		FILM NUMBER:		211340290

	MAIL ADDRESS:	
		STREET 1:		415 HOLIDAY DRIVE
		STREET 2:		SUITE 100
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FOSTER L B CO
		CENTRAL INDEX KEY:			0000352825
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-METALS SERVICE CENTERS & OFFICES [5051]
		IRS NUMBER:				251324733
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		415 HOLIDAY DR
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220
		BUSINESS PHONE:		4129283431

	MAIL ADDRESS:	
		STREET 1:		415 HOLIDAY DR
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15220
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2021-10-15</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000352825</issuerCik>
        <issuerName>FOSTER L B CO</issuerName>
        <issuerTradingSymbol>FSTR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001888828</rptOwnerCik>
            <rptOwnerName>Ness Robert</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>L.B. FOSTER COMPANY</rptOwnerStreet1>
            <rptOwnerStreet2>415 HOLIDAY DRIVE, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>PITTSBURGH</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>15220</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, Precast Concrete Products</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>6047</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>/s/ Robert Ness by Judith Balog, attorney-in-fact</signatureName>
        <signatureDate>2021-10-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>poa_ness.htm
<TEXT>
<html>
  <head>
    <title></title>
    <!-- Licensed to: Broadridge Financial Solutions, Inc.
         Document created using EDGARfilings PROfile 7.6.0.0
         Copyright 1995 - 2021 Broadridge -->
  </head>
<body style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; text-align: left; color: #000000;" bgcolor="#ffffff">
  <div>
    <div><br>
    </div>
    <div style="text-align: center; margin-top: 0.7pt; font-size: 12pt; font-weight: bold;"><u>LIMITED POWER OF ATTORNEY</u></div>
    <div style="text-align: justify; text-indent: 36pt; margin-top: 26.8pt; font-size: 12pt;">The undersigned, Robert Ness, does hereby nominate, constitute and appoint as his true and lawful attorneys-in-fact
      and agents with authority limited to and as specifically set forth herein, Patrick Guinee, Alex DelVecchio, and Judith Balog (each hereinafter referred to as an "Attorney-in-Fact").</div>
    <div style="text-align: justify; text-indent: 36pt; margin-top: 11.95pt; font-size: 12pt;">Each Attorney-in-Fact hereunder shall have the authority to: act, sign, execute and deliver for and on behalf of
      and in the place and stead of the undersigned, in the undersigned's capacity as a director and/or officer of L.B<font style="font-size: 10pt; font-weight: bold;">. </font>Foster Company, a Pennsylvania
      corporation (the "Company"), the Forms 3, 4 and 5 documents pursuant to and in accordance with Section 16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the "Exchange Act"); to do and perform any and all
      acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5 and file such form with the U.S. Securities and Exchange Commission and any stock exchange or similar authority; and to
      take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such Attorney-in-Fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the
      documents, executed by such Attorney-in-Fact on behalf of the undersigned pursuant to this Limited Power of Attorney shall be in such form and shall contain such terms and conditions as such Attorney-in-Fact may approve in such Attorney-in-Fact's
      discretion.</div>
    <div style="text-align: justify; text-indent: 36pt; margin-top: 12.45pt; font-size: 12pt;">The undersigned hereby grants to each such Attorney-in-Fact full power and authority to do and perform any and
      every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power
      of substitution or revocation, hereby ratifying and confirming all that such Attorney-in-Fact shall lawfully do or cause to be done by virtue of the rights and powers herein granted. The undersigned acknowledges that the foregoing Attorneys-in-Fact,
      in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act.</div>
    <div style="text-align: justify; text-indent: 36pt; margin-top: 12.1pt; font-size: 12pt;">This Limited Power of Attorney shall commence on the date of execution and shall remain in full force and effect
      until the undersigned is no longer required to file Form 3, 4, or 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the
      Attorneys-in-Fact.</div>
    <div style="text-align: justify; text-indent: 36pt; margin-top: 11.35pt; font-size: 12pt;">IN<font style="font-size: 10pt; font-weight: bold;">&#160;</font>WITNESS
      WHEREOF, I have caused this Limited Power of Attorney to be executed on October 12, 2021.</div>
    <div style="margin-top: 11.35pt;"><br>
    </div>
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          <td style="width: 52.54%; vertical-align: top;">&#160;</td>
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            <div style="font-size: 12pt;"><u>/s/ Robert Ness</u></div>
          </td>
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        <tr>
          <td style="width: 52.54%; vertical-align: top;">&#160;</td>
          <td style="width: 47.46%; vertical-align: top;">
            <div style="font-size: 12pt;">Robert Ness</div>
          </td>
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    <div style="margin-top: 11.35pt;"><br>
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</SEC-DOCUMENT>
