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27.5 Directional Procedure, Part 2: Enclosed Simple Diaphragm Buildings With H ≤ 160 Ft <br />T-27.6-2 (psf) X oof Exp adjust factor T-27.6-2 = 1 <br />0.00 <br />Ph =21.80 Ph = 25.20 <br />P0 =21.80 P0 =25.20 <br />62 24 <br />Example will work for V =110, 115 and 120 MPH only. <br />Wind Normal to Ridge Wind Parallel to Ridge <br />Roof Height h =15 feet <br />Exposure C <br />Roof Pitch =0.00 :12 <br />Topography factor Kzt =1.00 26.8.2, Figure 26.8-1 <br />Building & Structure Risk Category = IBC T-1604.5 <br />Wind Speed V = 110 mph Fig. 26.5-1A, MRI = 700 yrs <br />Wind Normal to Ridge, L/B = 2.583 use 2.0 Wind Parallel to Ridge, L/B = 0.39 use 0.5 <br />Since .2 ≤ L/B ≤ 5.0 = Yes Since .2 ≤ L/B ≤ 5.0 = Yes <br />and h ≤ 60 = Yes and h ≤ 60 = Yes <br />Building meet Class I condition ? Yes Building meet Class I condition ? Yes  <br />Since .5 ≤ L/B ≤ 2.0 = No Since .5 ≤ L/B ≤ 2.0 = No <br />and 60 ≤h ≤1 60 = No and 60 ≤h ≤1 60 = No <br />Fundamental period =0.500 sec Fundamental period =0.500 sec <br />More than h/75 sec. NG More than h/75 sec. NG <br />Building meet Class II condition ? No Building meet Class II condition ? No <br />From T-27.6-1, V = 110 MPH Exp C, L/B =2.0 and 15 FT. HT From T-27.6-1, V = 110 MPH Exp C, L/B =0.5 and 15 FT. HT <br />Ph =21.80 Kzt Ph =25.20 Kzt <br />Po =21.80 Kzt Po =25.20 Kzt <br />T-27.6-2 V =110 Exp C, h =15 Roof slope =0:12 <br />Zone 1 =-23.5 <br />Adjust factor T-27.6-2, = 1.00 <br />Design roof pressure for zone 1 = -23.50 PSF <br />Wind Base Shear = 7.85 kips Wind Base Shear = 23.44 kips <br />II, standard <br />== <br />35-24 UMIH Suite H_SANTA ANA_R0.xls, Wind Analysis MWFR<160ft <br />Page 3 <br />800 N Tustin Ave Unit <br />#H1/23/2025