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28.4 Envelope Procedure, <br />MWFRS For Low -Rise Building. Part 2: Enclosed Simple Diaphragm Building (5 60 ft) <br />Roof Height h = 24 feet <br />Roof Pitch = 4.00 :12 = 18.43 Degree <br />Building & Structure Risk Category = It, standard IBC T-1604.5 <br />Wind Speed V = 110 MPH Fig. 26.5-1A, MRI = 700 yrs <br />Topography factor K,I=1.38 26.8. Figure 26.8-1 <br />Exposure B <br />Height Adjustment factor A = 1 Fig 28.6-1 <br />-5.68D <br />-10.09B <br />23.69C <br />35.63A <br />-22.08G-16.53H <br />-31.88E-21.69F <br />= '6ft 'I <br />-18.OBF-13.94H <br />-31.88E-22.08G <br />Plus and minus signs signify pressums actrng toward and away Imm projected surfaces, respechvuly. <br />For Case B use B = 0° <br />Total horizontal load shall not be less than that determined by assume p . = O in zones B & D <br />a= 1096 of least horizontal dimension or OAh. whichever smaller. but bot less than either 4% of least <br />horizontal dimention or aft. <br />10 % of least dimension= 2.6 ft <br />40 % of the eave height = 9.6 ft <br />4 % of least dimension or 3 ft-- 3.0 ft c <br />Wind pressure: <br />A= 36 psf <br />C = 24 psf <br />a= 3ft <br />uplift= 32 psf roof <br />N-S direction: <br />Projected area = 30 sqft <br />0.6W = 648 Ibs <br />N-S direction: <br />Projected area = 30 sqft <br />Projected area = 100 sqft <br />0.6W = 2088 Ibs <br />Job Number: <br />Engineer: <br />Frankie Tsui <br />Job Name: <br />3825 COLBY REMODELING <br />Date: <br />2/16/2022 <br />Location: <br />3825 COLBY AVE, Everett, WA 98021 <br />Page: <br />12 <br />