I got asked a question recently that just threw me off. The question was three lines long,
PGA = 0.3
S1 = 0.9 (I think S1 was 0.9, but I don't recall exactly what the value was)
Find PGAm?
I know PGAm can be found using section 11.8.3 from ASCE 7-16 but the factor Fpga, is based on the site class not S1. Thus, I got confused on how to find PGAm. I am not sure if you have any comments that could help me solve this question.