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5thWall Building Diagnostics Consultants Government Services Annex <br /> District Attorney Office <br /> Roof Replacement <br /> November 2009 <br /> PART 3 EXECUTION <br /> 3 . 01 Inspection <br /> A . Verify that existing construction is sound and dry so as to adequately support new <br /> components . <br /> B . Verify that damaged or deteriorated portions of existing wood nailers and blocking have <br /> been removed . Damaged or deteriorated materials shall be removed in full , continuous <br /> lengths . <br /> C . Verify that curbs are sound, firmly anchored, smooth, and clean on surfaces scheduled to <br /> receive new nailers . <br /> D . Verify that surfaces of masonry walls are sound , firmly anchored, and smooth . Provide <br /> new masonry units requi its as red . <br /> E . Document the actual quantities of materials installed in progress reports to Designer . <br /> 3 . 02 Installation — Nailers and Blocking <br /> A . Set rough carpentry to required levels and lines , with members plumb , true to line , cut, <br /> and fitted . Fit rough carpentry to other construction ; scribe and cope as needed for <br /> accurate fit . Locate nailers and blocking to comply with requirements for attaching other <br /> construction . <br /> B . At edges , curbs and other locations where nailers and blocking occur, remove damaged , <br /> deformed, or deteriorated materials and replace with new materials . Notify Owner and <br /> Designer of any nailer replacement . Nailers requiring replacement shall be verified by <br /> the Owner or Designer . Claims for additional cost shall be den verifi ied without cation . <br /> C . Provide nailers at perimeter of roof, around openings through roof, and where roofs abut <br /> walls , curbs , and other vertical surfaces . Except where indicated otherwise , nailers shall <br /> be 6 inches wide . <br /> D . Anchor nailers securely to underlying construction . Perimeter nailers shall be anchored <br /> in accordance with FM Loss Prevention Data Sheet 1 = 49 . <br /> E . All nailers shall be of sufficient thickness so as to be flush with the roof insulation <br /> interface and securely anchored . <br /> F . Wood nailers and blocking shall be secured with a minimum of two fasteners per piece . <br /> Fasteners shall be positioned 6 inches from each end and a maximum of 2 feet o . c and <br /> staggered 1 /3 of the nailer width . Two fasteners shall be installed at ends of nailer <br /> lengths . <br /> G . Anchors used to secure new wood nailers , blocking, etc . shall be countersunk to provide <br /> a flush finish . <br /> 09 -26 Rough Carpentry <br /> 061000 -3 <br />