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Justin, I referred these questions to John Dunteman, Chair of the ASCE 7 Rain and Snow Loads task committee. He offers the following response: 1- the 5 to 8 psf change in rain on snow is because of the change in load factor in ASCE 7-22. The adoption of reliability-targeted design ground snow...
We are trying to help owners understand the new changes in codes, as well as follow best practices, even with the current code jurisdiction not requiring ASCE 7-22. Based on my understanding of the latest ASCE 7-22, we are seeing a significant increase in the loading when considering the...
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,...