Calculate wind uplift pressure on solar arrays using ASCE 7 velocity pressure formula with exposure and directionality factors.
Input Parameters
Results
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Velocity Pressure (qz)
psf
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Design Pressure
psf
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Total Uplift Force
lbs
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Force per Attachment
lbs
Note: ASCE 7-22 is the basis for wind design. GCp values for solar arrays follow Chapter 29 (open buildings) or SEAOC PV2-2017. Negative GCp indicates uplift (suction).
Reference
qz = 0.00256 × Kz × Kd × Ke × V² (ASCE 7-22 Eq 26.10-1)
Design Pressure = qz × GCp
Total Force = |Design Pressure| × Tributary Area
Ke = ground elevation factor (1.0 at sea level)