![]() Section 1609 of IBC 2003 gives wind requirements specifically focused on a simplified procedure acceptable for enclosed, low-rise, simple diaphragm buildings having a height of less than 60 feet. Program generated wind loads calculated per ASCE7-05 are service loads. Among these methods, only Method 2-Analytical Procedure for Buildings of Any Height is implemented. Method 2 is further composed of two different provisions: a method for Low-Rise Buildings and a method for Buildings of Any Height. ASCE 7-05 includes three methods for wind load calculation: Method 1- Simplified Procedure, Method 2- Analytical Procedure, and Method 3- Wind Tunnel Procedure. It lists alternative methods and wind speed values. IBC 2006/2009 Section 1609.1.1 refers to Chapter 6 of ASCE 7-05 for Wind load requirements. Program generated wind loads calculated per ASCE7-10 are ultimate loads. Only the directional procedure is implemented into the program. How are IBC/ASCE7 wind pressures calculated?ĪSCE 7-10 includes three different procedures for wind load calculation: directional, envelope, and wind tunnel procedure. Where the wind may hit more area, user defined loads should be used. The slab edge determines the exposure (Ram Frame – Loads – Exposure) and we assume some kind of vertically spanning cladding transfers the loads to the diaphragms. The program calculates a total force based on total exposure, considering one windward surface and one leeward surface per diaphragm. How is the wind typically applied to the model?
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