Step 4
Calculate the racking force (for both wind directions).
Formula
Racking force (kN) = area of elevation (m2) x wind pressure (kPa)
For complex elevations, combine the results of separate calculations to end up with a total racking force for each of the two wind directions.
The total racking force for wind direction 1 = 14.04 m2 x 0.92 = 12.9 kN.
The total racking force for wind direction 2 = 43.74 m2 x 0.6 = 26.2 kN.
Try out these calculations: Use your calculator to see whether you can accurately work out all the calculations done above. Do your answers match up to these?
Discuss any differences or problems with your trainer.