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<br />BOTAS ENGINEERING, INC. <br /> <br />Job Sunny Isles Restaurant <br /> <br />Consulting Engineers <br /> <br />- <br />Sheet No. of <br /> <br />Patricia M. Botas - Florida license # 41829 <br />7875 NW 12th Street, Suite 120 - Miami, FL 33126 <br /> <br />Calculated by DBC Date 5/2010 <br /> <br />Checked by PMB Date 5/2010 <br /> <br />7. Wood Beams: <br /> <br />7. I . Wood Rafters 3" x 8" 51mply supported, L=81-4" <br />Material Properties : <br />Wood speCie: SOUTHERN F'INE No.-I <br />Allowable Bending Stress: Fb:= I 500pSl <br />Modulus of Elasticity: E:= I 700000 pSI <br />-3 <br />Density: WSF'lne := 551bfft <br /> <br />t <br />p~ <br /> <br />6 <br /> <br />{- <br />Iq4b <br /> <br />---- <br /> <br />// <br /> <br />5ectlon Properties : <br />See scheme for "a" and "b" values: <br /> <br />width: a:= 25m <br /> <br />thick: b := 7.5m <br /> <br />Moment of Inertia Rect. section: <br />'rafter := b3. a. 12- I <br /> <br /> <br />Section modulus : <br />S '- b2 - I <br />rafter .- . a . G <br /> <br /> <br />Loads : <br /> <br />Tnbutary width: Tnb:= 2ft <br /> <br />Live load : <br /> <br />RafterLL := 20psf <br /> <br />WLL := T nb . RafterLL <br /> <br /> <br />Dead load <br /> <br />RafterDL := (b. a + Tnb. b) . WSF'lne + Tnb. RoofDL WDL:= RafterDL <br /> <br />Wind load : <br /> <br />RafterWL := GO. I psf <br /> <br />WWL := Tnb . RafterwL <br /> <br /> <br />AnalYSIS <br /> <br />Load Combination I: UMlform DL + LL <br /> <br />Span length: L:= 8.33ft <br /> <br />[Simple span] <br /> <br />Moments <br />Max. F'osltlve Moment due to DL: MMax.F'os.DL:= 8- I . WDL' L 2 <br /> <br />MMax.F'os.DL = 1.09 KiP' ft <br /> <br />M -I L2 <br />Max. F'osltlve Moment due to LL : Max.F'os.LL := 8 . WLL' <br /> <br />MMax.F'os.LL = 0.35 KiP' ft <br /> <br />85 <br />