ASCE7-16: It seems that when siteClass=E and 0.75<ss<1.0, fa=1.3 rather than null or ...
... an interpolated values between fa=1.3 and fa=1.2. An example is here. However, this might be the intended behavior for the asce7-16 service, to be updated in an asce7-16s1 ("supplement 1") service. So @james_nautilustracker.com and I can sort this out, @emartinez can you please point us to the code for asce7-16 fa (and fv, fpga)?