14.05.1609 Basic design wind speed.

Section 1609.3 (Basic Wind Speed) shall be replaced with the following:

Basic Wind Speed. The basic wind speed for determining designed wind pressure shall be 135 miles per hour, 3 second gust.

Prescriptive – Vult = 135 MPH, exposure B

Engineered Design (IRC & IBC Chapter 16):

Unless proven to be outside of special wind regions per the currently adopted ASCE, any structural elements designed outside of IBC prescriptive requirements are required to be designed using:

IBC ultimate design criteria for wind loading. (Vult = 135 MPH, 3 second gust for Risk Category II or Risk Category as applicable) See commercial structural design information for additional IBC requirements.

Vasd = Vult √(0.6)

(Sec. 3 (Exh. B) of Ord. 2004-06-04; amended by Sec. 9 of Ord. 2007-06-19; amended by Sec. 13 of Ord. 2025-10-01)