<SEC-DOCUMENT>0001663722-21-000001.txt : 20210614
<SEC-HEADER>0001663722-21-000001.hdr.sgml : 20210614
<ACCEPTANCE-DATETIME>20210614081327
ACCESSION NUMBER:		0001663722-21-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210525
FILED AS OF DATE:		20210614
DATE AS OF CHANGE:		20210614

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Rosenzweig Benjamin L
		CENTRAL INDEX KEY:			0001520557

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-05200
		FILM NUMBER:		211013353

	MAIL ADDRESS:	
		STREET 1:		50 OLD IVY ROAD SUITE 230
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30342

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SYNALLOY CORP
		CENTRAL INDEX KEY:			0000095953
		STANDARD INDUSTRIAL CLASSIFICATION:	STEEL PIPE & TUBES [3317]
		IRS NUMBER:				570426694
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		4510 COX ROAD
		STREET 2:		SUITE 201
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23060
		BUSINESS PHONE:		864-585-3605

	MAIL ADDRESS:	
		STREET 1:		4510 COX ROAD
		STREET 2:		SUITE 201
		CITY:			RICHMOND
		STATE:			VA
		ZIP:			23060

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BLACKMAN UHLER INDUSTRIES INC
		DATE OF NAME CHANGE:	19710510
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_162367279596830.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-05-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000095953</issuerCik>
        <issuerName>SYNALLOY CORP</issuerName>
        <issuerTradingSymbol>SYNL</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001520557</rptOwnerCik>
            <rptOwnerName>Rosenzweig Benjamin L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>79 WEST PACES FERRY ROAD</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>ATLANTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30305</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-05-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.82</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>33256</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks>On May 25, 2021, the Board of Directors granted Mr. Rosenzweig 10,000 shares of restricted stock in recognition of his increased responsibilities associated with being elected Chairman of the Board.  These shares of restricted stock will vest twelve (12) months from the grant date.</remarks>

    <ownerSignature>
        <signatureName>Sarah M. Cunningham, Power of Attorney for Benjamin Rosenzweig</signatureName>
        <signatureDate>2021-06-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
