Wind Load (Wall Components & Cladding)

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.
AssumptionsMean 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
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Wall Components and Cladding (C&C) for buildings of any height
CalculationInputsBuilding properties
﻿﻿Building Classification
:II​
﻿
﻿﻿Enclosed? (Y/N)
:N​
﻿
﻿﻿Roof Type
:Monoslope​
﻿
﻿﻿ hr
:14.67ft​
﻿
﻿﻿he
:14.67ft​
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﻿﻿ B
:222ft​
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﻿﻿L
:204ft​
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﻿﻿Component Name
:Wall​
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﻿﻿ Ae
:533sqft​
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Wind and site properties
﻿﻿Exposure Category
:C​
﻿
﻿﻿V
:90mph​
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﻿﻿Kzt
:1​
﻿
﻿﻿Kd
:0.85​
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﻿﻿Hurricane Region
:Y​
﻿
﻿
OutputsBuilding properties
﻿﻿ θ
:0deg​
﻿
﻿﻿h
:14.67ft​
﻿
﻿﻿ a
:8.16ft​
﻿
Velocity pressure, qh
﻿﻿Kh
:0.848884152077903​
﻿
﻿﻿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​
ExplanationDesign wind load pressures, pWind load tabulation for Wall Components and Cladding. For zone definitions of the walls, refer to diagrams below.
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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
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Snippet from ASCE 7-22 page 317
Wall Zones for GCp, buildings with h > 60 ft
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Snippet from ASCE 7-22 page 334
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		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
























	14.67	0.85	14.96	17.66	-19	17.66	-19
	14.67	0.85	14.96	17.66	-19	17.66	-19
	0.63
	0.63
	-0.72
	-0.72
	0.55
	-0.55