Determine Effective area for each story, Ai Determine Design wind pressures, p, see Section 27. Determine External pressure coefficient, Cp, see Figs. Determine Gust-effect factor, see Section 26. Determine Velocity pressure, see Section 26. Determine Velocity pressure Exposure Coefficients, Kh and Kz, see Table 26. Determine Ground elevation factor, Ke, see Section 26.9Ģ.6. Determine Topographic factor, Kzt, see Section 26.8Ģ.5. Determine Wind directionality factor, Kd, see Section 26.6Ģ.3. Determine Basic Wind speed, V, see Section 26.5Ģ.2. Outline of Process for Determining Wind LoadsĢ.1. Mean roof height h does not exceed least horizontal dimension.Ģ. ![]() ![]() Mean roof height h less than or equal to 60 ft (18 m).Ģ. BASIC WIND SPEED, V : Three-second gust speed at 33ft (10m) above the ground in Exposure C (see Section 26.7.3) as determined in accordance with Section 26.5.1.īUILDING, ENCLOSED : A building that has the total area of openings in each wall, that receives positive external pressure, less than or equal to 4 sq ft (0.37m2) or 1% of the area of that wall, whichever is smaller.Įnclosed or partially enclosed building that complies with the following conditions:ġ.
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