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CLIENT: ~I,~ <br />CITY: "~' , ' ' ' ' ' <br /> <br />POST FRAME BU~LDIN~ ANAL. YS~S, USING D~PH~GM THEORY <br />o SZeN FRAME USZNG P O:H POST-FRaME USZMG <br />DIAPHRAGM THEORY" <br /> <br />DESIGN LOADS: j <br /> <br />ALLOWABLE SOIL PRESSURE 15OOPSF <br />WIND 80MPH EXP.B <br />BIDEWALL FRAME SPACING .~1~ FT <br />WIDTH OF BUILDING I ~ FI' <br />LENGTH OF BUILDING ~FT <br />EAVE HEIGHT /~ PT <br />SLOPE OF ROOF,s/Z2 <br />DESIGN WINO PRESSURE= Qs~Ce*Co~I <br />I=l.O Q$=ITPSF Ce=.7 Co~AS PER UBC <br /> <br />OVER 20FT~B <br /> <br /> QS Ce Co DWP(20 DWP),20 <br /> WINDWARD WALL 17 .7 ,B 9.52 10.88 <br /> LEEWARD WALL ~7 .7 .5 5.96 6.80 <br /> ROOF LEEWARD 17 .7 .7 8.33 9,52 OUTWARD <br /> ROOF WINDWARD 17 .7 .3 3.57 4.08 INWARD <br /> ROOF VER~?~¢ SNOW/2 +ROOF EL-ROOF HOR. <br /> <br /> I $ ABOVE ARE FOR 12 FT BAY FACTOR <br />~.5~ ~ II:~ ~ LARGER O~ SMALLER BAY <br /> <br />FOR <br /> <br />STEP 1.APPLY WIND LOAD AND 1/2 SNOW LOAD AND DEAD LOADS TO <br />THE BUILDING FRAME ANALOG AND PLACE A VERTICAL ROLLER A'r EAVE <br />LINE TO DETERMINE LATERAL RESTRPZNING 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 DIAPHRAGM RESISTANCE FORCE MODIFIER(md) AND <br />THE ROOF CLADDING SHEAR FORCE MODIFIER FROM TABLES I AND 2 <br />THE TESTED ROOF SHEAR FOR A 12 FT STEEL ROOF PANEL IS 87.92 <br />LBS FOR 28 G~UGE METAL FOR A 12 FT SECTION THE MAX.SHEAR <br />WOUCD BE 1300LBS. NOW DETERMINE K2 FROM LUTTRELL'S FORMULA <br />C=E*T/[2(i+V)g/p+K2/(b'~t)~2] <br /> <br />C=29,000,000' .016~ <br /> <br /> 2*( 1+ ,3 )*1 .2+K2/( 144, ~0i65 <br /> <br />C=2543 <br /> <br /> <br />