Laserfiche WebLink
Velocity Pressure Exposure Coefficients,Kh and KZ I <br /> Table 29.3-1 I <br /> ASCE 7-10 <br /> Height above Exposure <br /> ground level,z <br /> B C D <br /> ft (m) <br /> 0-15 (0-4.6) 0.57 0.85 1.03 <br /> 20 (6.1) 0.62 __- 0.90 1.08 _ <br /> 25 (7.6) 0.66 0.94 1.12 <br /> 30 (9.1) 0.70 0.98 1.16 <br /> ___ 40 (12.2) 0.76 1.04 1.22 <br /> 50 (15.2) 0.81 1.09 1.27 <br /> 60 (18) 0.85 1.13 1.31 <br /> 70 (21.3) 0.89 1.17 1.34 <br /> 80 (24.4) 0.93 1.21 1.38 <br /> 90 (27.4) 0.96 1.24 1.40 <br /> 100 (30.5) 0.99 1.26 1.43 <br /> 120 (36.6) 1.04 1.31 1.48 <br /> 140 (42.7) 1.09 1.36 1.52 <br /> 160 (48.8L 1.13 1.39 1.55 <br /> 180 (54.9) 1.17 1.43 1.58 <br /> 200 (61.0) 1.20 1.46 1.61 <br /> 250 (76.2) 1.28 1.53 1.68 <br /> 300 (91.4) 1.35 1.59 1.73 <br /> _ 350 1106.7) _ 1.41 1.64 1.78 <br /> 400 (121.9) 1.47 1.69 1.82 <br /> 450 (137.2) 1.52 1.73 1.86 <br /> 500 (152.4) 1.56 1.77 1.89 <br /> Notes: <br /> 1. The velocity pressure exposure coefficient KZ may be determined from the following <br /> formula: <br /> For 15 ft. <_z 5 zg For z< 15 ft. <br /> KZ=2.01 (z/zg)2/a KZ=2.01 (15/zg)2'a <br /> 2. a and zg are tabulated in Table 26.9.1. <br /> 3. Linear interpolation for intermediate values of height z is acceptable. <br /> 4. Exposure categories are defined in Section 26.7. <br /> Page 10 of 12 <br />