Wind Load Calculator

Compute the NSCP 2015 / ASCE 7 velocity pressure q_z, the windward / leeward / side wall pressures for the Main Wind-Force Resisting System, and the along-wind base shear & overturning — for an enclosed rigid building — with a pressure-profile diagram.

⭐ Free to compute · Balance … EP

⚠️ Educational tool — verify against NSCP 2015 / ASCE 7. Uses the MWFRS Directional Procedure for an enclosed, rigid, regular building (K_z exposure constants, G = 0.85, GC_pi = ±0.18). Roof, components & cladding, flexible/dynamic effects, and special shapes need the full code procedure.

① Wind & site

Basic wind speed V (kph)

Exposure category

Importance factor I_w

Topographic K_zt

Directionality K_d

Gust factor G

② Building geometry

Width B (m, ⟂ to wind)

Depth L (m, ∥ to wind)

Mean roof height h (m)

Internal GC_pi (±)

Leeward C_p depends on L/B (−0.5 for L/B ≤ 1, −0.3 at 2, −0.2 for ≥ 4, interpolated). Windward C_p = +0.8, side walls −0.7. Internal pressure cancels in the net along-wind shear.

💨 Wind pressures & base shear

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NSCP 2015 §207 MWFRS directional procedure

K_h (roof)

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q_h (roof)

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p windward (top)

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p leeward

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Base shear V_w

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Overturning M

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Velocity pressure up the windward wall

z (m)	K_z	q_z (kPa)	p_ww (kPa)

Wind Load Calculator

① Wind & site

② Building geometry

💨 Wind pressures & base shear

Velocity pressure up the windward wall

Worked solution