Aerodynamic Loads

This chapter considers two main cases. In the first case, the objective is to determine, for specific structures, aerodynamic loads at the center of mass of each floor, on main members, on secondary members (e.g., purlins and girts), and on cladding. In the second case, the objective is to develop standard provisions on pressure coefficients. The chapter discusses orthogonal and non‐orthogonal tap placement patterns and the determination of individual tap tributary areas. It reviews the determination of aerodynamic loads at floor levels, and on main members, secondary members, and cladding. The chapter describes a method used to develop standard provisions on pressure coefficients as functions of areas contained within specified zones. It also concerns wind‐driven rain intrusion. Standards specify pressures applicable to areas of various sizes contained in specified zones within which it is assumed for practical design purposes that the pressures are uniform.