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CITY <br /> <br />POST FRAME 3UZLDING ANA~.Y2Z3~ USTNG DIAPHRAGM THEORY <br /> <br />DIAPHRAGM THEORY" AS*E(~OL.~. NO.".5 =~B4-1372. 1986 <br /> <br />DESIGN LOADS: <br />~,SNOW 25PSF <br />,ALLOWABLE SOIL PRESSURE &500RSF <br />WIND 80MPH EXP.B <br />SIDEWALL FRAME SPACING /~ FT <br />WIDTH OF BUILDING ~¢ FT <br />LENGTH OF BUILDING ~'FT <br /> EAVE HEIGHT /]~FT <br /> SLOPE OF R0OF '~/12 <br /> DESIGN WIND PRESSURE= Q$~Ce~Co~I <br /> l=1,.0 Qs=ZTPSF C¢=.7 Co=AS PER UBC <br /> <br /> MARION COUNTY <br /> BUILDING iNSPECTION <br /> <br />Ce OVER 2OFT=.8 <br /> <br /> Qs Ce Co DWP<20 DWP>20 <br /> WINDWARD WALL 17 ~7 .8 9.52 10.88 <br /> LEEWARD WALL 1.7 ~7 ~5 5.95 6.30 <br /> ROOF LEEWARD 17 .7 .7 8.33 9.52 OUTWARD <br /> ROOF WINDWARD 17 .7 .3 3.57 4.08 INWARD <br /> ROOF VERTI}'mw SNOW/2 ~ROOF DL-ROOF HOR. <br /> H,o~_¢~ ~_~,~/~ 12.5 + 3~0- 3.3 = 12.24 <br /> <br /> ~ ABOVE ARE FOR S2 FT BAY FACTOR FOR <br />~,S~ ~ ~ ~_>~,~ LARGER OR SMALLER BAY <br /> <br />STEP L.ARPLY WIND LOAD AND 1/2 SNOW LOAD AND DEAD LOADS TO <br />THE BUILDING FRAME ANALOG AND ~LACE A VERTICAL ROLLER AT EAVE <br />LINE TO DETERMINE LATERAL RESTRAINING FORCE OF ]"HE 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 W~TH NO,RESTRAINTS <br />ON FRAME. <br />STEP 3.SELECT TNB DIAPHRAGM R~SISTANCE FORCE MODiFIER(md) AND <br />THE ROOF CLADDIMG SHEAR, FORCE MODIFIER FROM TABLES 1 AND 2 <br />THE TESTED ROOF SHEAR FOR A 12 FT, STEEL ROOF PANEL IS 87.92 <br />LBS FOR 28 GAUGE METAL FOR A 12 FT SECTION THE MAX.SHEAR <br />WOULD BE 1300LBS. NOW DETERMINE K2 FROM LUTTRELL'S FORMULA <br />C=E*T/E2(I+V)g/p~K2/(b'*t)~2] <br /> <br />C=29,000,000~ -0165 <br /> <br /> 2~(1+.3} 1.2eK2/(144~.0165) 2 <br /> <br />C=2543 <br /> <br />F,i L F-- <br /> <br /> <br />