Port Orchard Snow Load Psf Roof

Roofs are under a lot of pressure.

Port orchard snow load psf roof.

See the map usage notes or snow load analysis for oregon part. If the snow weighs 10 pounds per cubic foot and there are 1 5 feet on the roof each square foot of the roof is getting 15 pounds of pressure. If your roof is 1 000 square feet the total snow load is 15 000 pounds of snow. The ground snow loads to be used in determining the design snow loads for roofs shall be determined in accordance with asce 7 10 or figure 1608 2.

Pursuant to montana law the minimum design roof snow load after allowed reductions shall be 30 psf. Point load 2 grade and wet service conditions. Snow loads shall be determined by the building official. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched.

Assumes 60 psf live load 10 psf dead load l 360 deflection 2 grade and wet service conditions. Oregon requires a minimum roof snow load of 20 psf pm in asce7 for all roofs plus a 5 psf rain on snow surcharge for many roof types resulting in a 25 psf minimum roof design load for most roofs. 2 the basic roof snow load factor c b shall be 0 8 except that for large roofs it shall be a 1 0 30 l c 2 for roofs with c w 1 0 and l c greater than or equal to 70 m or b 1 3 140 l c 2 for roofs with c w 0 75 or 0 5 and l c greater than or equal to 200 m where l c characteristic length of the upper or lower roof defined as 2w w l in metres. Only the properly adjusted loads can be used to design roof structural elements.

In areas of the state outside of certified city county and town jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design. The north zone middle zone and the south zone are identified on the roof load zone. Use our roof snow load calculator to determine your design roof snow loads. To figure out the load on your roof take the depth of snow in feet and multiply it by the weight of a cubic foot of snow.

Schilke civil agricultural engineering montana state university august 1989. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. The minimum design roof snow load. Assumes 60 psf live load 10 psf dead load l 180 cantilever deflection with 220 lb.

Incising assumed for refractory species including douglas fir larch hem fir and spruce pine fir. When using figure 1608 2 for sites at elevations above 1 000 feet 304 m the ground snow load shall be increased from the mapped value by 2 psf 0 095 kn m 2 for every 100 feet 30 48 m above. However a south roof load zone home cannot be installed in either a middle or north roof load zone. In areas of the state outside of certified local government jurisdictions the design snow load shall be based on the ground snow loads developed in snow loads for structural design in montana authored by f f.