Sloped Roof Roof Snow Load Map

Done calculate drift surcharge load.

Sloped roof roof snow load map.

The slope roof snow load p s shall be obtained by multiplying the flat roof snow load pf by the roof slope factor cs. 20 ft of the roof multiply the drift load by the factor. 20 s 20 where s is the spacing in feet. Check for loads due to snow sliding from an upper roof.

Psf pounds per square foot above line 60 psf. All snow loads acting on a sloping surface shall be considered to act on the horizontal projection of that surface. P s cspf equation 68 5 3. Other considerations for sloped roofs can be found throughout chapter 7 of asce 7 10.

Residential roof with asphalt wood shingles or shakes would use fig. See section 7 4 5 asce 7. 0 7 x 50 psf 35 psf. B sloped roof snow loads ps.

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. To calculate roof snow load per residential building code. Check for ice dams and icicle loads. 0 7 x pg ground snow load pf roof snow load roof snow load examples.

Snow loads for structural design in montana revised 2004 gregory p. The snow load that is applied to our structure is not the ground snow load but in most cases the flat roof snow load. 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. 60 ground snow psf below line 50 psf 50 ground snow psf. 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. 1610 8 snow pockets or wells.

7 2b with a c s 1 0 p f flat roof snow load in psf. In our case let s assume that our structure has a flat roof roof slope 5. In this case the sloping roof with snow guards shall be designed for the unit snow loads required for a flat roof. Account shall be taken of the load effects of potentially excessive snow accumulation in pockets or wells of roofs or decks.

0 7 x 60 psf 42 psf below line. On the low roof if proper snow guards are provided on the high roof. 7 4 1 7 4 4 and asce figure 7 2 below. P s sloped roof snow load in psf c s roof slope factor as determined by asce sec.

P s c s p f where.