Manassas Park city, VA Roof Snow Load - 20 psf
What ASCE 7 says about snow load in Manassas Park city
That's Manassas Park city's design roof snow load per ASCE 7-22, for a typical heated single-family home - the number a permit reviewer starts from. The physics-based figure alone would be 17.5 psf, but ASCE 7's own low-slope minimum (§7.3.4) sets a floor of 20 psf for flat and low-pitch roofs here, which is the number that actually governs.
Converted to something you can actually eyeball on a roof: about 44 in. of fresh powder, 16 in. once it settles and packs down, or just 4 in. if it's turned to ice. A meaningful design load. Most homes built to modern code handle it, but additions, carports, and flat-roofed sections are worth a second look.
Manassas Park city at a glance
- Design roof snow load20 psf
- Ground snow load, ASCE 7 map25 psf
- National rank#998 of 2,758
- Virginia rank#60 of 110
- Population16,611
- Annual snowfall, NOAA normal18.5 in.
- FIPS51685
Where Manassas Park city's figure sits nationally
Out of 2,758 rated US counties, Manassas Park city sits at #998, the top 36% nationally - #60 of 110 within Virginia. 18.3 psf is Virginia's typical county figure - Manassas Park city beats it by 1.7 psf.
Near 38.7694°N 77.4423°W, FIPS 51685: Manassas Park city counts 16,611 residents and a 25 psf map value, which the code's own factors turn into 20 psf.
How much it actually snows in Manassas Park city
Most winters bring Manassas Park city roughly 18.5 in. of snow - NOAA's normal at VIENNA, VA US, 11.8 mi off. (fresh vs. packed vs. ice explains why.)
Read this before you rely on it
Manassas Park city's number above is ASCE 7-22's default case, not a custom calculation: ordinary residential occupancy, heated, sited on ground that's neither fully sheltered nor fully exposed. Any one of those changing - pitch, exposure, heating, occupancy - moves the real figure.
Nothing here substitutes for an address-level number. Get one free, in about a minute, from the ASCE 7 Hazard Tool using your own coordinates rather than Manassas Park city's county-wide figure. (How this figure is calculated.)