<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-12-31</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001038363</issuerCik>
        <issuerName>METALS USA INC</issuerName>
        <issuerTradingSymbol>MUSA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001331308</rptOwnerCik>
            <rptOwnerName>Citadel Wellington LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O CITADEL INVESTMENT GROUP, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>131 S. DEARBORN STREET, 32ND FLOOR</rptOwnerStreet2>
            <rptOwnerCity>CHICAGO</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60603</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3379842</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnote</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Citadel Wellington LLC, an affiliated entity of Citadel Limited Partnership, became a reporting person under Section 16(a) of the Securities Exchange Act of 1934, as amended (the &quot;Act&quot;), as a result of its formation, upon which it may be deemed a member of a &quot;group&quot; under the Act with Citadel Limited Partnership and certain of its other affiliated entities with respect to the securities of the Issuer.  All of the securities being reported on this Form 3 have been previously reported as owned by Citadel Limited Partnership and such other affiliated entities, most recently on a Form 4 filed December 21, 2004, by such reporting persons.  Citadel Wellington LLC intends to file jointly with these other reporting persons to report transactions in the Issuer's securities occurring after the date hereof.</footnote>
        <footnote id="F2">Citadel Wellington LLC may be deemed to indirectly control Citadel Equity Fund Ltd., which directly and indirectly owns shares of the Issuer, and may be deemed to have a pecuniary interest in such shares.  Citadel Wellington LLC disclaims beneficial ownership of such shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>CITADEL WELLINGTON LLC By:  Citadel Limited Partnership,  its Managing Member By:  Citadel Investment Group, L.L.C.,  its General Partner By:  /s/ Matthew B. Hinerfeld  Matthew B. Hinerfeld, Managing  Director and Deputy General Counsel</signatureName>
        <signatureDate>2005-07-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
