Topographic (Speed-up) Effects

The program implements the speed-up effect, from section 26.8 and Figure 26.8-1. NBC Structure for and for the USA, The Equations are used for the multipliers K₁, K₂, and K₃ rather than the table.

You can enter Hill Type ( None, 2-D Ridge, 2-D Escarpment, 3-D Hill), the length and height of the hill and the distance of the building from the crest. For escarpments, there is a check box to indicate whether the building is on top of or below the crest.

The program applies the topographic factor to the wind load generation equations and displays it in the log file output.