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Bracing Wood Trusses <br />Commentary and <br />Recommendations <br />Truswal supplies ifs tabricafors, who use Truswal rnefal plate <br />COnnecfori. with Camplete enqineering 5uppo��. ThiS irxlutles <br />individual truss designs. recommendotions ot engineering ond <br />1ru55 opplicofion proctices, producf testing ontl approvals, ontl <br />eflorts fo confinually upgrade qua!�ty and otticiency while <br />helping our fobriCators mointoin p competitive posifion The Truss <br />P1ofe institute's "besign Specifications lor light Metal Plate <br />Connected Wootl Trusses" ore used os the criteria ror me devgn <br />ot these individuol trusses as sfructural components . <br />ReQarbless of how carefully wood trusses are designed and <br />fabricoted, fhe finOl erection ontl brocing ot a r00� or flOOr <br />system is crifical. It is of ihis crificol stage of conitrucfion ihot <br />mony sigruflcant design ossumptions such as proper bracing are <br />either fulfilletl or igrared. If ignored. the consequences moy be <br />- eolN�pse of the strucfure. <br />The IMory of braclnp Is to apply sulflclenisuppoA at ripht <br />cnqles to lhe plane otthe truu to hold every huss member <br />In ths posRlon auumed for It In deslqn. fie pu0d�r or <br />�neMon oonhaolor IL, howevar, responslble forwood <br />fruaa hondllnp and for proper femporary and pertnanent <br />braclnp. Hs must auuro Mat tnrsses are nof shucfurolly <br />� yamcyed durinp erectlon and tnat they are matntolned <br />_ In allpnmeM beforo, tlurinp, and afler InstollaHon. <br />Temporory and pertnanent brc :Jnp may follow, bul not <br />necsaarlly be Ilmlted to the buildinfl deslynetsframinp <br />plan which should be 1ha source of iruu bracing and <br />bulldlnq connecflon defalls. • <br />�tipp;� .. <br />r,r,.,..�.' .,\ � I tu�tlmelnp R�ebmfn at on .- <br />e :- <br />������f` tonf irwue btertf bixirq at fequnea <br />I' �Y// �- � (porl oRruft oes�pn). Flpur� C- <br />�a«ro p <br />►�,��. � . .. <br />sneo,N�p <br />' � �coma%'es�ra,wee-iad�+o�a�e�ncd <br />iR;�: �' <br />.. . . .�- ContiAqU�W�xd6rxe - <br />��� . . . . ... . . <br />�popo�d Gace roaed io obooYte.vae o� , <br />. i� •� v.ebD�evenlilotero�movementanOf�+ou�d <br />��! repl0�9C at opdOtrtn0lNy iOlpBt in <br />' hNdt.'.. � ( . . ..A. . . <br />�S::ied:.d,r;',-_ : e . <br />Cebnp . . . • . � . <br />-. aromnrq. . ` . <br />� Canpa�uanweq�es�a�oMeltMEu[Y. <br />1 , 1 � � <br />�. . �: <br />�� � ,�-•:� � , - � <br />�, � � �. , . <br />• �--Contiruws W�e�d bo[�q ��� 1Px• <br />• • Itq. Wt WrrtuN W\aral EUCY1n0010�. W!b <br />�' . ; i.: � i i :: memosn ai me tan tm� <br />, �� 1�� . II .. � d� oCbqlmAOM�IWtlbO�w�''.. <br />I � .. . �' . / ' - ' ' ' �,11 . <br />� � � ���.� � .. ,� <br />`.'::.� . . ._._- - at'� <br />. : <br />I� Flpur� C � \ Deo�p la Irussn . . . . . <br />H Is �comm�nd�d by TPI If�at �nctlon bracinq b� appllW <br />af �ach hu�s b plae�d in poslflon. <br />The design of wood trusses in occordance witn TPI design criter�o <br />assumes: <br />1. Truss members ore Initiolly siraignt, unilorm in cross sectiort and <br />uniform in desipn properties. ., <br />2,Trusses a p�one strucfural componenis. insla0?d vertica�y. <br />. braced to prevent IQteral mover�ent. ond paroilel to each ethBr <br />;at fhe d2sign spacing. <br />�.Truss members are pinned at joints for determinotion ot aiiol <br />forces oniy. � <br />I.There is continuity ol chord members at joinls for defem+�natbn <br />of moment stresses. <br />S.Compression members are bterolly restrainetl at spei.ilic bCa• � <br />tions or intervals. <br />6.Superimposed deod or live Ioads act vertically. wind loads are <br />Oppli9d 1WfR10110 th0 p�0�19 O� �h9 top ChOfd. afld C0�1CenttOf9d <br />Ioads ore opplietl at o�int. � •:. <br />7.in addition to the loteral bracing specified by ihe fruss deslgner. <br />the bu�lding designer will speCify suff icient brocing at righ} anglei <br />to the plane ol the iruss to hold every truss member in th9 posi• <br />tion assumed for it in design. .- <br />E.The building designer (not ihe iruss designer) will specify sutti- <br />cient bracing and connections to withstanci iaterai loodirq ot <br />the entire structure. <br />'These details and much of the tezt are ezcerpts trom ftie Tp <br />pubiication 'lraelnpWoodiruu�s:Comm�nlaryandR�com� <br />mendallonf" For more specihr_ inbrmation d is recommentled <br />ihat you ConfoCt TPI or your local truss fobrlCotor for o CopV O( inis <br />important document � <br />