Sloped Roof Roof Snow Load Map

Psf pounds per square foot above line 60 psf.

Sloped roof roof snow load map.

7 4 1 7 4 4 and asce figure 7 2 below. 60 ground snow psf below line 50 psf 50 ground snow psf. The flat roof snow load is calculated using formula 7 3 1. 1610 8 snow pockets or wells.

The slope roof snow load p s shall be obtained by multiplying the flat roof snow load pf by the roof slope factor cs. In our case let s assume that our structure has a flat roof roof slope 5. P s cspf equation 68 5 3. 0 7 x pg ground snow load pf roof snow load roof snow load examples.

See section 7 4 5 asce 7. The sloped roof snow load p s shall be obtained by multiplying the flat roof snow load p f by the roof slope factor c s. 0 7 x 50 psf 35 psf. P s c s p f where.

7 2b with a c s 1 0 p f flat roof snow load in psf. 20 ft of the roof multiply the drift load by the factor. On the low roof if proper snow guards are provided on the high roof. Check for ice dams and icicle loads.

Check for loads due to snow sliding from an upper roof. Done calculate drift surcharge load. 0 7 x 60 psf 42 psf below line. Calculate sloped roof snow load p s using the following equation.

Values of c s for warm roofs and cold roofs are as. Superpose the drift load on the base snow load. If you live in the us our snow load calculator compares the total weight on your roof with the permissible load calculated according to the standards issued by the american society of civil engineers regarding the minimum design loads for buildings and other structures asce7 16. B sloped roof snow loads ps.

20 s 20 where s is the spacing in feet. To calculate roof snow load per residential building code. P s sloped roof snow load in psf c s roof slope factor as determined by asce sec. Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10.

See section 7 9 asce 7. The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load. Snow loads for structural design in montana revised 2004 gregory p. In this case the sloping roof with snow guards shall be designed for the unit snow loads required for a flat roof.

All snow loads acting on a sloping surface shall be considered to act on the horizontal projection of that surface.