Basic Wind Speed from Velocity Pressure
The equivalent basic wind speed behind a bare velocity pressure.
Example
You enter
- Velocity pressure q (psf) 25
You get
- Equivalent basic wind speed 98.8 mph
Details, formula, and sources
V = sqrt(q / 0.00256). A 25-psf velocity pressure corresponds to a ~98.8 mph basic wind speed. Enter the bare q (not a Cp-loaded design surface pressure). A design aid; ASCE 7 and the engineer of record govern.
V = sqrt(velocity_pressure_psf / 0.00256), the ASCE 7 base velocity pressure q = 0.00256 V^2 solved for the wind speed.
ASCE 7-22 (Minimum Design Loads for Buildings and Other Structures). Section 26.10 (the base 0.00256 V^2 velocity pressure), solved for V. Public formula; licensed text not reproduced.
ASCE 7 licensed; the 0.00256 velocity-pressure relation is public. NOAA basic wind speeds free at hazards.atcouncil.org.
Estimate. AHJ and licensed structural engineer govern.
Field names used by the API: velocity_pressure_psf, wind_speed_mph
- Air-density factor 0.00256 ASCE 7-22 Section 26.10; V = sqrt(q / 0.00256)ASCE 7-22 by name
- Bare velocity pressure enter q before Kz/Kzt/Kd/G/Cp; not a Cp-loaded design surface pressureASCE 7-22