Snow Load

ASCE 7-22 Preliminary estimate

Convert ground snow load to flat- and sloped-roof design snow loads. Alaska community values are built in to get you in the right range fast.

Results update as you type. These are educational estimates — confirm against the governing code and a licensed engineer before design use.

Method & references

Roof snow loads follow ASCE 7-22, Chapter 7:

p_f = 0.7 · C_e · C_t · I_s · p_g

p_s = C_s · p_f

p_g — ground snow load (psf)
C_e, C_t, I_s — exposure, thermal, importance factors
C_s — roof slope factor (Fig. 7.4-1), which depends on slope, thermal condition, and whether the surface is slippery

For low-slope roofs (< 15°) a minimum snow load p_m may govern. Ground snow load in Alaska is highly site-specific — the prefilled community values are rounded and illustrative; use the SEAAK Snow Loads in Alaska study, the local building department, or the ASCE 7 hazard tool for design.