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Add. Orthog. Load Fraction: Inputting a value here will add adds additional wind loading at 90 degrees (orthogonal) to the main load as a fraction. If you wish want to have 30% orthogonal load, input 0.30. For vertical vessels (skirt supported, leg supported, lug supported or support ring supported), vector math will be calculations are then used and the resultant vector load will be determined an used in the calculations. For horizontal vessels (saddle supported), this is handled in the calculation of Qc. This value defaults to zero.
Seismic
0.2 S Spectral Response Acceleration (Ss): mapped MCER , 5 percent damped, spectral response acceleration parameter at short periods.
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