Dear Support,
We are designing one skirt supported vessel with ASCE-2010 Seismic design. The vessel falls under Seismic Design Category A.
As per 11.7 of ASCE-2010, for seismic design, the vessel needs to comply with section 1.4.
With equation 1.4-1 of 1.4, the lateral force (i.e. base shear) should be determined as Fx=0.01 * Wx.
However, PVElite uses formula 0.3 * Sds * W * I from equation 15.4-5 to calculate the base shear.
Can you please clarify why PVElite uses equation 15.4-5 instead of equation 1.4-1.

Thanks in advance.
Dhanaji Jadhav