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:' ': '"' ....... RECEIVED <br /> LOOT 2 0 ~995 <br /> <br />~ATE.' ~C~ .... : ....' '" ' ' <br /> <br />DIAPHRAGM THEORY" A$AE(VO~i29~ <br /> <br /> DESIGN LOADS: <br /> SNOW 25PSF <br /> ALLOWABLE SOIL PRSSSURE i$OORSF <br /> MIND 80MPH EXP,B <br /> <br />· SIDEWALL FRAME SP~CZNG i~-,. FT <br /> WIDTH,OF BUILDING ~ FT <br /> .LENGTH' OF BUILDIN~ ~0 FT <br /> EAVE HEIGHT ~ FT <br /> SLOPE OF ROOF ~"~12 <br /> <br /> .%=&.O O~=27PSF Ce=.7 Co=AS PER UBC <br /> <br />Ce OVER 2OFT=.8 <br /> <br /> Q8 Ce Co DWP<20 DWP > 2,.0 <br />WINDWARD WALL 17 .F .8 9~$2 10.88 <br />LEEWARD WALL 17 .,7 .$ 5.95 6.80 <br />ROOF LEEWARD 17 .7 .? $~33 9.52 OUTWARD <br />ROOF WINDWARD ,,' 17 .7 .3 3.S7 4.08 INWARD <br /> <br /> ROOF VERT?*m~ SNOW/2 +ROOF DL-ROOF HOR. <br /> ~,o,~.~.,,/,~ L.~.~,~.12.5 +----,.. 3.0- 3.3 = 12,24 <br />~ ABOVE ARE FOR 12 FT BAY FACTOR FOR <br />~,S~...-~, t,~ ~¢ LARGER OR SMALLER BAY <br /> <br /> STEP ~.APPLY WIND LOAD Afro 1/2 SNOW LOAD AND DEAD LOADS TO <br /> THE BUILDING FRAME ANALOG AND PLACE A VERTICAL ROLLER AT EAVE <br />LINE TO DETERMINE LATERAL RESTR'~NING FORCE OF THE POST <br />FRAME.(ROLLER REACTION) <br />STEP 2.DETERMINE FRAME STIFFNESS (K) BY APPLYING P OF A <br /> iO00LBSHOR. POINT FORCE AT THE EAVE LINE WITH NO RESTRAINTS <br /> ON FRAME, <br /> STEP 3.SELECT THE ~IAPHRAGM RESISTANCE FORCE MODIFIER(md) AND <br /> ,THE ROOF CLADDING SHEAR FORCE MODIFIER FROM TABLES 1 AND 2 <br /> THE TESTED ROOF SHEAR FOR A 22 FT STEEL ROOF PANEL IS 87.92 <br /> LBS FOR 28 6AUGE METAL FOR A 12 FT SECTION THE MAX.SHEAR <br /> WOULD BE 1300LBS. NOW DETERMINE K2 FROM LUTTRE~.~$: <br /> C=E~T/[2( i+V )¢/p+KI/( b '~t )~2] <br /> <br />2~( i+.3)~1.2+K2/( 144- ~0165 <br /> <br /> <br />