About SnowLoadCheck
Why this exists
ASCE 7 already sets the design roof snow load every US building permit is checked against, but the figure is published as a contour map and a pounds-per-square-foot number - not something most people can eyeball against the snow actually piling up on their roof. SnowLoadCheck reports that code figure per county, then converts it into an inches-of-snow depth so it means something without a structural engineer to translate it.
What goes into the number
Each county's design roof snow load comes from ASCE 7-22's own ground snow load map and load formula, including the low-slope-roof minimum (§7.3.4) where it governs. Snowfall context comes from NOAA's 1991-2020 climate normals at the nearest reporting station. Both sources are named on every county's page; SnowLoadCheck does not estimate or invent either figure.
A county figure, not a permit number
This is a reference figure for a typical heated home on a partially exposed lot, ASCE 7-22's own default case. A real permit application needs the number at one exact address, which the free ASCE 7 Hazard Tool provides directly, linked from every county page.
Who runs this
SnowLoadCheck is an independently run site, not affiliated with ASCE, NOAA, or any building-code body. Where a page ever carries a sponsored or affiliate link, that will be disclosed on the page itself and in the privacy policy.
Written by
Every county page on SnowLoadCheck is generated directly from ASCE 7-22's ground snow load map and NOAA's climate normals, not paraphrased from another site. Pages are written by AI tools working from that data, not a named human author. Corrections reported through the contact page are checked against the ASCE and NOAA source data directly.