Wind Pressure Calculator

Building Parameters

Basic Wind Speed, V

kph

Exposure Category

Material

Mean Height, h

Building Width, B

Building Length, L

Roof Profile

Fig. 207B.4-1

Roof Angle, θ

degrees — θ < 10° uses the flat zone table

Eave Height

m — used as q_h reference when θ ≤ 10° (note 7)

Overhang Length

m — horizontal projection (§207B.4.4)

Frame Spacing

m — tributary width for the overhang force

Enclosure

K_zt

K_d

Parapet Height

m — q_p is taken at the parapet TOP (§207B.4.5)

Importance Factor, I_e

MWFRS at the roof is moment-resisting frames

Exempts the Fig. 207B.4-1 note 9 horizontal-shear floor

Cases 1 and 3 only (§207B.4.6 exception)

Granted by Appendix D of ASCE 7-10, which is outside NSCP §207 — you own that determination.

Getting Started

Enter the building parameters and click Calculate Wind Pressure.

This calculator follows NSCP 2015 §207B (Directional Procedure, buildings of all heights) for MWFRS wall and roof pressures — walls and roofs from Figure 207B.4-1 (printed p. 2-74), overhangs from §207B.4.4, parapets from §207B.4.5, the four design wind load cases from §207B.4.6 / Fig. 207B.4-8 and the minimum load from §207B.4.7. It computes velocity pressure, gust factor, wall pressure coefficients (windward, leeward, sidewall), flat / gable / hip / monoslope roof pressure zones, the torsional load cases and the note 9 horizontal-shear floor.