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Excel Engineering, Inc. 11/18/2009 Page # <br /> Design Pressure Coefficients: Analytical Method - AU Heights (ASCE 7 -05) <br /> (positive pressure acts inward, negative acts outward) <br /> : Basic wind speed (3- second gust) _ 1 110.0 I mph (V) ASCE F6 -1 <br /> : Exposure factor = <br /> : Ocouanoy category = B ASCE 6.5.6.3 <br /> 71-1 <br /> 11 ASCE T1 -1 <br /> : Building dimension (gable) = 141.3 ft <br /> : Building dimension (save) = 84.7 ft <br /> : Joist support height = 16.00 ft (hj) <br /> : Joist spacing = 5.40 ft (s) <br /> : Parapit height = 4.00 ft (hp) <br /> : Roof pitch = 0.00 /12 (r) <br /> : Building style = Enclosed ASCE 6.2 <br /> : Topographic type = None ASCE 6.5.7.1 <br /> : Height of topographic relative to upwind terrain = 0.00 ft (H) ASCE 6.3 <br /> : Upwind distance to difference In elevation of 1/2 topographic height = 0.00 ft (L ASCE 6.3 <br /> : Distance from crest to building site (downwind positive) = 0.00 ft (x) ASCE 6.3 <br /> : Building height = (hj }hp) = 20.00 (z) <br /> : Mean roof height = 16.00 ft (h) ASCE 6.3 <br /> : Minimum height exposure constant = 30.00 ft (z,,,,,) ASCE T 6-2 <br /> : Equivalent height of structure = max(z,,,h„(.6)(h)) = 30.00 ft (zb) ASCE 6.5.8.1 <br /> : Importance factor = I 1.00 I (I ASCE T6 -1 <br /> : Height of atmospheric boundary layer = 1200.00 ft (z ASCE T6 -2 <br /> : 3- second gust speed power law exponent = 7.00 (a) ASCE T6 -2 <br /> : Velocity pressure exposure coefficient at z (case 2) = 0.624 (K ASCE T6 -3 <br /> : Velocity pressure exposure coefficient at h (case 2) = 0.585 (Khz) ASCE T6-3 <br /> : Velocity pressure exposure coefficient at h (case 1) = 0.701 (K ASCE T6 -3 <br /> : Wind directionality factor = I 0.85 I (1< ASCE T6-4 <br /> : Ratio of topographic height to distance of 1/2 topographic height = 0.000 (H/L <br /> : Ratio of distance from crest to building to distance of 1/2 topographic height = 0.000 (x/L,) <br /> : Horizontal attenuation factor = 1.000 (4) ASCE F6-4 <br /> : Height attenuation factor = 1.000 (y) ASCE F6-4 <br /> : Topographic shape & max. speed up effect factor = 0.950 _ (C ASCE F6-4 <br /> z =h/3 z =h ASCE F6-4 <br /> K ' =(C = 1.000 1.000 (K1) ASCE F6-4 <br /> K2 = ( = 1.000 1.000 (KZ) ASCE F6.4 <br /> y K = ecc rxwM = 1.000 1.000 (K3) ASCE F6.4 <br /> : Topographic factor = (1 +((K1)(K = 1.00 1.00 (KO ASCE E6-3 <br /> : Velocity pressure @ z (case 2) = (.00256)(Kz)(Kn)(Kd)(V = 16.43 I psf (qz) ASCE E6 -15 <br /> : Velocity pressure @ h (case 2) = (.00256)(Kh2)(Kzi)(Kd)(V2)(1w) = 15. ps ( q„2) ASCE E6 -15 <br /> : Velocity pressure @ h (case 1)1= (.00256)(K„,)(K = 1 18.45 J psf (qh1) ASCE E6-15 <br /> save gable <br /> : Integral length scale factor = 320.00 320.00 (1) ASCE T6 -2 <br /> : Integral length scale power law exponent = 0.33 0.33 (€) ASCE T6 -2 <br /> : Integral length scale of turbulence = t/(zb133) = 330.33 330.33 (L ASCE E6 -7 <br /> : Background response = (1 /(1+(.63)((B +h)/L = 0.86 0.83 (Q) ASCE E6 -6 <br /> : Turbulence intensity factor = 0.30 0.30 (c) ASCE T6 -2 <br /> : intensity of turbulence = (c)(33/zb)f = 0.30 0.30 <br /> (Iz) ASCE E6 -5 <br /> : Gust effect factor = (. 925 )(( 1 + 1 . 7 ( +(1.7)(3.4)(1 = 0.84 0.82 (G) ASCE E6-4 <br /> : internal pressure coefficient = 0.18 0.18 (GC ASCE F6-5 <br /> : Edge strip dimension (10% of least horizontal dimension) = 8.47 ft (a) ASCE F6 -11 <br /> : Edge strip dimension (.4)(z) = controls 8.00 ft (a) ASCE F6 -11 <br /> : Edge strip dimension (4% of least horizontal dimension) = 3.39 ft (a) ASCE F6 -11 <br /> : Edge strip dimension (3 ft) = 3.00 ft (a) ASCE F6 -11 <br /> F:1Standards1500 Structural\Calculation Spreadsheets\SPREADSHEETS12006 IBC analytical wind - steel - flat - 1 story.xls <br />