Wind loads on rectangular signboards and hoardings

Drag or normal force coefficients on a range of rectangular signboards or hoardings with varying aspect ratios, clearance ratios and porosityʹs are presented for a range of wind directions and compared with various design data. Whereas, there is reasonably good agreement for data for walls on ground, significant discrepancies exist in normal force coefficients for cases as the panel becomes elevated in the boundary layer. Discrepancies in codification have been highlighted and revised loading data recommended.