A structure must be dimensioned for the highest value of the wave forces and moments. The wave height Hs has a stochastic character. However, the problem can be solved by dimensioning for a load that has an acceptable exceedence probability per storm.

Equations used:

The forces and moments are the dependent on the wave steepness and the significant wave height:

1. s0p < 0.0051 and 0.8 < hB/Hs < 2.0

2. s0p ≥ 0.022 and 0.8 < hB/Hs < 2.0

3. 0.0051 ≤ s0p < 0.022 and 0.8 < hB/Hs < 2.0