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� <br />� <br />St�andard Struc�ures Inc. <br />P.O. Booc K 3ar�ta Raw. G B61Q2 <br />707/6�4-?8B2 Fa�c 707/54�-?DW <br />� <br />Evan Hol�Jmxh1 <br />� Cascade Lumber <br />P.O. Box 3� <br />Sunwood. WA 98292 <br />� Re: Installed System Tolcranas <br />� Mr. Hol�lmxht. <br />,�,��,� �o. �� � (� � �.� 9 �J [� �� <br />G' <br />OEC 1 'J 2002 <br />c��•�r or �v�i;E��n• <br />Permi! Scr:ic: ; <br />Solid Snwn S-Cry 2x10 M2 & Better Grada blaidng and rim, installed with the Standard Structu�e's 9 l/4"ssI )6 seria joist. Is <br />an acccptable application of the anached detail, provided the lumber is Idln dried, to maintain in servia �Irc same spaifed depth <br />(9-1/4") es the ssI Joiri. The mvision :`Extubit A ihat eluNnatcs thc V16" detail was done lo admowledge manufatturing <br />toleranas and generally acccpi d framing practices. The use of a 9-I/2" joist in conjunction with 2x10 rim, is oot allmvable. <br />The Standard Swctures ICBO PFC�325 Evaluation Report goveins our daign aiteria.'I'6e dry lumber nm with spxial <br />tolerana criteria tl�at Cauade Lumber provida. dried and specified as ooted on the attas6ed detaii. ExLibit A is aczeptable. <br />Standard Sw�.tura Inc. has m�ieasd available literature, building cad�s and hss reviemd typical consvuctioa at various sites <br />relntive to toleranca Wnt would be acaptable for the installed construction system. <br />Th¢ coasauctian matenals used in the industry have toleranca for individual comiponenu such az I Joists. Tolttanas mlating to <br />the 6nished system including the componrnts, worlmianship and 6eld wndiaom ere not elmrly deGned We are developiag <br />construction toleranas to apply to the assembled wmpooeats iu the 6eld and txo� tbat 8dd condidons do contribute to ttu <br />finel coaswetion dimensions. The intent of Standard St:uctufa Ine. is w pmmote good worlm�aactup with t6e use of SSI'a <br />products, but lealiu whete toleranoes eAat, and diuing tLe coutse oCcoostructioq it is oeoasacy ro have a clear underataading <br />about the quality oC tLe finislxd canswction. <br />Compoacnt roleranca re�ding I Joist aze plus 0" tn a minus I/8" compaRd to the tolaanas for a rim matecial which aie plus <br />li8" ta a minus 0". thac toleranas in Ihe exueme coodirio4 in the 6e14 qn develop a system that has a U4" diHb�ence <br />betvvaen the i laist and the rim material. Altbough Wis is not the prdemd sinuNon thit may occvr. <br />� Ta evaluate the conswcted system due io toleranca, field aonditioat, worlmianship, etc. it is nearsary ro de6ne an aaxptable <br />amount beyond �he extmno component toleranca. The building system out of tolerance af tweaty percent waild apply to arry <br />considuadon aCall tbe faaors ro determine itan installed condidon is aoceptable. At an examplq a building wi�h a perimela of <br />� twro hundrod (=00) lineal foet wWd have 40 feet out oC loletana. Althwgh this u aot a eemmmendcd practia or standard it <br />allows Cor an evaluation oC a stnuture to a minimum In�el and will prm�ide a tool for Cascade Lumber. your nutcmm and the <br />building o�cials to have a mutually ag�ttd upon meatiw -ment. <br />� <br />i rcly, <br />1 <br />even Ca1etU <br />Praduct Developmem <br />Director. CE33399 <br />Developing Bener Ways ta Build <br />