<SEC-DOCUMENT>0001047444-13-000001.txt : 20130429
<SEC-HEADER>0001047444-13-000001.hdr.sgml : 20130427
<ACCEPTANCE-DATETIME>20130429095148
ACCESSION NUMBER:		0001047444-13-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20130425
FILED AS OF DATE:		20130429
DATE AS OF CHANGE:		20130429

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VINSON CARROLL D
		CENTRAL INDEX KEY:			0001047444

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19687
		FILM NUMBER:		13789431

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:			0809

	BUSINESS ADDRESS:	
		STREET 1:		775 SPARTAN BLVD., STE 102
		STREET 2:		P O BOX 5627
		CITY:			SPARTANBURG
		STATE:			SC
		ZIP:			29304
		BUSINESS PHONE:		864-585-3605

	MAIL ADDRESS:	
		STREET 1:		P O BOX 5627
		CITY:			SPARTANBURG
		STATE:			SC
		ZIP:			29304

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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-04-25</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001047444</rptOwnerCik>
            <rptOwnerName>VINSON CARROLL D</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1></rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity></rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2013-04-25</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3676</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>13.6</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>31750</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>Cheryl C. Carter, Power of Attorney</signatureName>
        <signatureDate>2013-04-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>powerofattorney_vinson.htm
<DESCRIPTION>POWER OF ATTORNEY FOR CARROLL D.
<TEXT>
Vinson<HTML>
<HEAD>
<META NAME="Generator" CONTENT="Microsoft Word 97">
<TITLE>CONFIRMING STATEMENT</TITLE>
</HEAD>
<BODY>

<FONT SIZE=2>
<P>&nbsp;</P>
<P>&nbsp;</P>
<P ALIGN="CENTER">CONFIRMING STATEMENT</P>
<P ALIGN="CENTER"></P>
<P ALIGN="CENTER">&nbsp;</P>
<P>This Statement confirms that the undersigned has authorized and designated Cheryl C. Carter to execute and file on the undersigned's behalf all Forms 3, 4 and 5 (including any amendments thereto) that the undersigned may be required to file with the United States Securities and Exchange Commission as a result of the undersigned's ownership of or transactions in securities of Synalloy Corporation. The authority of Cheryl c. Carter under this Statement shall continue until the undersigned is no longer required to file Forms 3, 4 or 5 with regard to the undersigned's ownership of or transactions in securities of Synalloy Corporation, unless earlier revoked in writing. The undersigned acknowledges that Cheryl C. Carter is not assuming, nor is Synalloy Corporation assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.</P>

<P>&nbsp;</P>
<P>/s/ Carroll D. Vinson</P>

<P>Dated: December 20, 1991</P></FONT></BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
