Psf Roof Load Shed Roof

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.

Psf roof load shed roof.

It is measured in pounds per square foot psf. Arch 331 note set 13 1 s2014abn 5 location 2uniform load psf kn m roofs ordinary flat pitched and curved roofs roofs used for roof gardens. Per horizontal square foot is expected to support nearly 12 inches of wet heavy snow. Factors that influence.

Reeds ferry works with eagle metal of dallas tx to ensure the structural integrity of our roof truss. Af pa s appendix a lists a variety of live and dead load combinations for floors ceilings and rafters. Many factors influence how a system responds to loading. The density of snow and hence its load per square foot depends on the type of snow.

However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. On the other hand snow that stayed on your roof for a few days will settle and while it seems that the cover gets thinner its weight doesn t change it s just the density that is different. 2attic loads may be included in the floor live load but a 10 psf attic load is typically used only to size ceiling joists adequately for access purposes. Thus a roof designed to carry a snow load of 20 lbs.

On a roof with a slope greater than 4 to 12 the live load limit is typically adjusted downward from 20 psf to 15 psf to allow for the relatively greater dead load on the steeper roof. See figure 1 headers. For example fresh snow is soft fluffy and light. As shown in the technical drawing below the reeds ferry standard roof has a load capacity rated at 110 pounds psf more than the highest code requirement.

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. For example appendix a indicates that one type of clay tile roof system has a live load value of 20 psf and a dead load value of 15 psf. The water content of snow may range from 3 for very dry snow to 33 for a wet heavy snow to nearly 100 for ice.