Use 20% of Pf (not Pg).
My colleague and I are not clear on the snow seismic load as defined in the ASCE 7-16, Ch.12, section 7.2, item number 4, which states that the effective seismic weight includes 20% of the uniform design snow load, when the flat roof snow load Pf, exceeds 30 psf [or minimum Pf as set by...
Minimum Design Loads and Associated Criteria for Buildings and Other Structures, ASCE/SEI 7-22 provides the most up-to-date and coordinated loading provisions for general structural design. This standard prescribes design loads for all hazards including dead, live, soil, flood, tsunami, snow,...