This sub-page determines wind load of open buildings of any height as per ASCE 7-10 Chapter 30 Part 3. Wind loads are determined for the

### Assumptions

1. Structure height, h ≤ 500 ft (= 150 meters)
2. Applicable for open buildings WITHOUT a roof. Open building defined as a building that has each wall at least 80% open
1. Sign convention of wind pressures: + is acting toward the surface, - is acting away from the surface
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### Building properties

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Building Classification
:II
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Height of structure
:125.0ft
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Structure Width, B
:150.0ft
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Structure Length, L
:100
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Damping Ratio, β
:0.01
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### Suggested range of β = 0.010-0.070

The Damping Ratio, β is the percent of critical damping.
It is only used in the calculation of the Gust Factor, Gf, when a structure is considered "flexible". A structure is considered "flexible" when it has a natural frequency, f < 1 hz. Otherwise the structure is considered "rigid".
Suggested range of values is from 0.010 to 0.070.
Note: if the structure is "flexible", the smaller the value of the damping ratio, the larger the gust effect factor, Gf, becomes.
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Period Coefficient, Ct =
:0.02
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### Wind and site properties

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Exposure category
:C
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Wind Speed, V
:170mph
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Topographic Factor, Kzt
:1.0
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Directionality Factor, Kd
:0.85
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Hurricane Region?
:N
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### Gust Effect Factor, G

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Frequency, f
:1.33748060995284Hz
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If f>=1, it is a rigid structure
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Simplified Gust Factor, G for rigid structure
:0.85
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Calculated Gust Factor, G for rigid structure
:0.854529822164449
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Calculated Gust Factor, G for flexible structure
:N.A.
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Chosen Gust Factor, G
:0.85
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### ⬆️ Design wind load pressures, p

Net design wind pressures, p for open structures for varying values of the Force Coefficient, Cf = 1.2, 1.6, 1.8 and 2.0.
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 ​ 0​ 0.85​ 53.38​ 45.38​ 54.45​ 72.6​ 81.68​ 90.75​ ​ 15​ 0.85​ 53.38​ 45.38​ 54.45​ 72.6​ 81.68​ 90.75​ ​ 20​ 0.9​ 56.72​ 48.21​ 57.85​ 77.13​ 86.78​ 96.42​ ​ 25​ 0.95​ 59.44​ 50.53​ 60.63​ 80.84​ 90.95​ 101.06​ ​ 30​ 0.98​ 61.77​ 52.5​ 63.01​ 84.01​ 94.51​ 105.01​ ​ 35​ 1.01​ 63.81​ 54.24​ 65.08​ 86.78​ 97.63​ 108.47​ ​ 40​ 1.04​ 65.63​ 55.78​ 66.94​ 89.25​ 100.41​ 111.57​ ​ 45​ 1.07​ 67.27​ 57.18​ 68.62​ 91.49​ 102.93​ 114.37​ ​ 50​ 1.09​ 68.78​ 58.47​ 70.16​ 93.55​ 105.24​ 116.93​ ​ 55​ 1.12​ 70.18​ 59.65​ 71.58​ 95.44​ 107.37​ 119.3​ ​ 60​ 1.14​ 71.48​ 60.75​ 72.9​ 97.21​ 109.36​ 121.51​ ​ 70​ 1.17​ 73.83​ 62.76​ 75.31​ 100.41​ 112.96​ 125.52​ ​ 80​ 1.21​ 75.94​ 64.55​ 77.46​ 103.28​ 116.18​ 129.09​ ​ 90​ 1.24​ 77.84​ 66.17​ 79.4​ 105.87​ 119.1​ 132.34​ ​ 100​ 1.27​ 79.59​ 67.65​ 81.18​ 108.24​ 121.77​ 135.3​ ​ 120​ 1.32​ 82.7​ 70.3​ 84.36​ 112.48​ 126.54​ 140.6​ For z = h:​ 125​ 1.33​ 83.42​ 70.91​ 85.09​ 113.45​ 127.63​ 141.81​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
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