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The tollowinQ �uidelines represent the � <br />recommendaHons of a TPI subcommittee on <br />fruss (nstallatfon: ' ` ' ' <br />i i . <br />i. Always reler to iroming plans for proper location ol irusses. <br />Do nOt simply iRttall them "as th0y come bH ihe pile" Refer <br />to iruss elevation drovling5 for proper tocation of cantilever <br />and� iMerior bearings. � , - <br />p. If a iruss is damaged belore erection: obtain repair or <br />replacement insirucfions from a quolilied truss designer <br />prior ta setting ihe truss. Repairs madg on the ground are <br />usuolly befter antl oiways easler. ' <br />J. Never olter any part of any truss for ony reoson witF»uf <br />professional advice. Cutting, drilling, or nOtching any <br />member withouf tlesigner cpprovai will desiroV the <br />struch:ral integrity of ihe truss antl void any expressed or <br />implied worronty. � <br />1: Girtlers ore trusses wMr_h carry othe� irus5es or relotively <br />large oieos ol rool or Iloor framing Almost neverwill a <br />common fruss (or even a double common) serve os a <br />girtler. If there is a quesfion about whether a girder is <br />neetled. consult your fobricafor <br />S. Double girders are commonplace. Even triple girders are <br />sometimes required. Make ;ure multiple member girders are <br />propedy IQminated pe� engineenng specifications. <br />�Y�c�as' <br />S ��j� �� c � <br />lb <br />6. Truss spacing should be in accordance wifh ihe fruss design. <br />Sometimes very small tleviotions from designed spacing <br />can creote vary big problems. Seek prolessionol advice If <br />you need to alter ony spOcing. <br />7. Construction loads such as stocks of plywood, sheetrock. piles <br />of roofir.g, gravel, or bncks should never be ploced on frusses <br />belore ihey are properly broced. Such IOpds shoultl be kopf <br />'small, located over wolls (never af mitl-spOn). and disiributed <br />over the rool or floar within minutes olter ihey are sef in place. <br />E. Make certain ihat proper temporary bracing Is instolled (see <br />the Truss Plafe Institute publication "&acing Wood Trusses: <br />Commentory antl RecommerxJations") as the irusses are � <br />sei. Never leave a job at night until all oppropriate bracinp <br />is in dace <br />9.Trusses whic� do nof ineef interior bearinq wolls should be <br />shimmed. Do not puil the irusses down. they w�ll tend to return, <br />- to originnl camber ond in a few davs or weeks your sheetrock <br />man will be repOinng t}� joint befween the ceiling and wall. <br />1 O. If irusses do nof rest on all bearing wolls propedy, make <br />certain thpt interior walls ore npf too high. Of fhe trusses are <br />• f Ipt }ru55es - m�kB CErtain ihey hove bE2n er@Ct@tl right <br />side up.) Correct w�th shims or by lowering high bearings. Do <br />ru�t pu�i truss down to bearings. <br />W� stronqly,endorss fhese common sense rules otfhumb and <br />recommer�d that you Inlorm t�� huu installars In your arsa ot <br />these puid4llnea <br />i <br />WOODINVIU.E TRUSS INC. <br />� P.O. BOX 558 <br />� M'OODINVILIF, WA 980T2-0558 <br />483-0101 <br />