This sub-page determines wind load of walls for buildings of any height as per ASCE 7-10 Chapter 30 Part 2. Wind loads are determined for the wall perpendicular to the wind direction.
Assumptions
- Mean roof heights, h ≤ 500 ft (= 150 meters)
- Major structural components supporting tributary areas > 700 ft^2 shall be permitted to be designed using the provisions for Main Wind Force Resisting Systems (MWFRS)
- Effective area, Ae for a component or cladding panel is:
a. Ae = span length x effective width > 1/3 span length
b. Ae = h^2 / 3 for a vertically spanning concrete masonry unit (CMU) or concrete wall
- Enclosed, partially enclosed and partially open buildings. Calculator is not applicable for open buildings.
- Applicable for Gable roof with roof angle, θ ≤ 45 degrees, or Monoslope roof with roof angle, θ ≤ 3 degrees. For flat roofs (θ = 0 degrees) use either Gable (G) or Monoslope (M) for "Roof Type". Gable roof is symmetrical.
- Sign convention of wind pressures: + is acting toward the surface, - is acting away from the surface
⬇️ Inputs
Building properties
Building Classification
:II
Enclosed? (Y/N)
:N
Roof Type
:Monoslope
Ridge Height, hr
:14.67ft
Eave Height, he
:14.67ft
Building Width, B
:222ft
Building Length, L
:204ft
Component Name
:Wall
Effective Area, Ae
:533sqftWind and site properties
Exposure Category
:C
Wind Speed, V
:90mph
Topographic Factor, Kzt
:1
Directional Factor, Kd
:0.85
Hurricane Region
:Y
⬆️ Outputs
Building properties
Roof Angle, θ
:0deg
Mean Roof Height, h
:14.67ft
Width of Zone 5 (end zones), a
:8.16ftVelocity pressure, qh
Velocity pressure coefficient, Kh
:0.848884152077903
Velocity pressure, qh (lb/ft^2)
:14.9620925108643
Wind pressure coefficients
Wall external pressure coefficient, GCp
0.63 | |
0.63 | |
-0.72 | |
-0.72 |
Internal pressure coefficient, GCpi
0.55 | |
-0.55 |
⬆️ Design wind load pressures, p
Wind load tabulation for Wall Components and Cladding. For zone definitions of the walls, refer to diagrams below.
Kh | qh | ||||||
Wall | 0 | 0.85 | 14.96 | 17.66 | -19 | 17.66 | -19 |
For z = hr: | 14.67 | 0.85 | 14.96 | 17.66 | -19 | 17.66 | -19 |
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14.67 | 0.85 | 14.96 | 17.66 | -19 | 17.66 | -19 | |
14.67 | 0.85 | 14.96 | 17.66 | -19 | 17.66 | -19 |
The diagrams are from Figure 30.3-1 and Figure 30.4-1 of ASCE 7-22, these wind load cases are the same in ASCE 7-10.
Wall Zones for GCp, buildings with h ≤ 60 ft
Wall Zones for GCp, buildings with h > 60 ft
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