-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 M40bTMBTMbHtYL1DtDEAVbv0jZVst53vq67STnCrK4LjEMZeg1IFQcAy2tTpG9YU
 U6WaMePkgt1Db38SYZ7vBw==

<SEC-DOCUMENT>0001015325-07-000026.txt : 20070110
<SEC-HEADER>0001015325-07-000026.hdr.sgml : 20070110
<ACCEPTANCE-DATETIME>20070110134354
ACCESSION NUMBER:		0001015325-07-000026
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20070108
FILED AS OF DATE:		20070110
DATE AS OF CHANGE:		20070110

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BAKER THOMPSON S II
		CENTRAL INDEX KEY:			0001190090

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07159
		FILM NUMBER:		07522732

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		9043551781

	MAIL ADDRESS:	
		STREET 1:		PO BOX 4667
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32201

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FLORIDA ROCK INDUSTRIES INC
		CENTRAL INDEX KEY:			0000037651
		STANDARD INDUSTRIAL CLASSIFICATION:	CONCRETE GYPSUM  PLASTER PRODUCTS [3270]
		IRS NUMBER:				590573002
		STATE OF INCORPORATION:			FL
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		155 EAST 21ST STREET
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32206
		BUSINESS PHONE:		9043551781

	MAIL ADDRESS:	
		STREET 1:		155 EAST 21ST ST
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32206

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SHANDS & BAKER INC
		DATE OF NAME CHANGE:	19730405
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-01-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000037651</issuerCik>
        <issuerName>FLORIDA ROCK INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>FRK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001190090</rptOwnerCik>
            <rptOwnerName>BAKER THOMPSON S II</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>PO BOX 4667</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>JACKSONVILLE</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>32201</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-01-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>L</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>4.3194</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>43.129</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1250</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>99876</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3146</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote.</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>27648</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote.</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares held in employee stock purchase plan account.</footnote>
        <footnote id="F2">Shares held directly outside employee stock purchase plan account.</footnote>
        <footnote id="F3">Shares are held as beneficiary of the issuer's profit sharing plan.</footnote>
        <footnote id="F4">Shares held by wife and children.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Daniel B. Nunn, Jr., Attorney in fact for Thompson S. Baker II</signatureName>
        <signatureDate>2007-01-09</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----