-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001473333-11-000001.txt : 20110214
<SEC-HEADER>0001473333-11-000001.hdr.sgml : 20110214
<ACCEPTANCE-DATETIME>20110214143532
ACCESSION NUMBER:		0001473333-11-000001
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20110210
FILED AS OF DATE:		20110214
DATE AS OF CHANGE:		20110214

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:		CROFT INDUSTRIAL PARK
		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

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			J. Kyle Pennington
		CENTRAL INDEX KEY:			0001473333

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19687
		FILM NUMBER:		11606124

	BUSINESS ADDRESS:	
		STREET 1:		PO BOX 1589
		CITY:			BRISTOL
		STATE:			TN
		ZIP:			37621
		BUSINESS PHONE:		423-989-4705

	MAIL ADDRESS:	
		STREET 1:		PO BOX 1589
		CITY:			BRISTOL
		STATE:			TN
		ZIP:			37621
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2011-02-10</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001473333</rptOwnerCik>
            <rptOwnerName>J. Kyle Pennington</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PO BOX 1589</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BRISTOL</rptOwnerCity>
            <rptOwnerState>TN</rptOwnerState>
            <rptOwnerZipCode>37621</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Pres of Brismet Pipe Division</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2011-02-10</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1400</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1890</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>401(k) Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">N/A</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Cheryl C. Carter, Power of Attorney for J. Kyle Pennington</signatureName>
        <signatureDate>2011-02-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>powerofattorney_kpennington.htm
<DESCRIPTION>POWER OF ATTORNEY FOR J. KYL
<TEXT>
e Pennington<HTML>
<HEAD>
<META NAME="Generator" CONTENT="Microsoft Word 97">
<TITLE>CONFIRMING STATEMENT</TITLE>
<META NAME="Template" CONTENT="C:\Program Files\Microsoft Word 97\Office\html.dot">
</HEAD>
<BODY LINK="#0000ff" VLINK="#800080">

<FONT SIZE=2><P>&nbsp;</P>
<P>&nbsp;</P>
<P ALIGN="CENTER">CONFIRMING STATEMENT</P>
<P ALIGN="CENTER">&nbsp;</P>
<P>This Statement confirms that the undersigned has authorized and designated Cheryl C. Carter to apply for the proper Form ID, and thereafter, 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/ J. Kyle Pennington</P>
<P>Dated: September 28, 2009</P></FONT></BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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