Thank you. I did a comparison to the UBC, which yields 6% gravity for the base shear. I did not realize that parts of Hawaii had the equivalent of a UBC Zone 1 seismicity.
Under the IBC 2003, seismic base shears are based on maximum considered earthquake ground motion for one-second and short spectral responses, S1 and Ss. Typically in Southern California, Ss is on the order of 1.4. In Hawaii the value is 0.178, resulting in a base shear of only 4% gravity. This...
