NEHRP 2020 Design Category
Implement design category calculations for NEHRP 2020.
Implementation is the same as for previous design documents. For NEHRP 2020, s1
is taken as the T=1.0 s value of the SAM spectrum for the BC site class boundary. Compute this value and then provide it to the design category calculator to obtain the SDC value.
Edit Changed how S1 should be obtained.
Edited by Martinez, Eric M.