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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000055805-10-000018.txt : 20100405
<SEC-HEADER>0000055805-10-000018.hdr.sgml : 20100405
<ACCEPTANCE-DATETIME>20100405163912
ACCESSION NUMBER:		0000055805-10-000018
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100401
FILED AS OF DATE:		20100405
DATE AS OF CHANGE:		20100405

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NORTH AMERICAN GALVANIZING & COATINGS INC
		CENTRAL INDEX KEY:			0000055805
		STANDARD INDUSTRIAL CLASSIFICATION:	COATING, ENGRAVING & ALLIED SERVICES [3470]
		IRS NUMBER:				710268502
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5314 S YALE AVENUE
		STREET 2:		SUITE 1000
		CITY:			TULSA
		STATE:			OK
		ZIP:			74135
		BUSINESS PHONE:		(918)494-0964

	MAIL ADDRESS:	
		STREET 1:		5314 S YALE AVENUE
		STREET 2:		SUITE 1000
		CITY:			TULSA
		STATE:			OK
		ZIP:			74135

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KINARK CORP
		DATE OF NAME CHANGE:	19920703

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KIN ARK OIL CO
		DATE OF NAME CHANGE:	19690601

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	KIN ARK OIL & GAS CO
		DATE OF NAME CHANGE:	19680906

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			HENRY JANICE K
		CENTRAL INDEX KEY:			0001084484
		STANDARD INDUSTRIAL CLASSIFICATION:	MINING, QUARRYING OF NONMETALLIC MINERALS (NO FUELS) [1400]
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-03920
		FILM NUMBER:		10731582

	MAIL ADDRESS:	
		STREET 1:		5314 S YALE AVENUE SUITE 1000
		CITY:			TULSA
		STATE:			OK
		ZIP:			74135
</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>2010-04-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000055805</issuerCik>
        <issuerName>NORTH AMERICAN GALVANIZING &amp; COATINGS INC</issuerName>
        <issuerTradingSymbol>NGA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001084484</rptOwnerCik>
            <rptOwnerName>HENRY JANICE K</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5314 S YALE AVENUE SUITE 1000</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TULSA</rptOwnerCity>
            <rptOwnerState>OK</rptOwnerState>
            <rptOwnerZipCode>74135</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, $.10 par</value>
            </securityTitle>
            <transactionDate>
                <value>2010-04-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4529</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>34267</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By the Company's Director Stock Unit Trust</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Director compensation earned in 2010 plus a matching amount from the company was deferred under the director stock unit program.  The deferred amounts were converted into the right to receive 4,529 shares of the company on or shortly after January 1, 2016.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Janice K. Henry, by Beth B. Pulley, Attorney-in-fact</signatureName>
        <signatureDate>2010-04-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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