The first step is gathering site-specific data and building classifications from the ASCE 7-05 tables and maps: Basic Wind Speed ( ASCE 7-05 Figure 6-1

: Importance factor based on building occupancy category (ranges from 2. Determine Design Pressure (

Let's consider an example calculation for a rectangular building located in an urban area (Exposure B). The building has a height of 20 meters (66 feet) and a plan dimension of 10 meters (33 feet) by 20 meters (66 feet).