Frameing For Roof Loads

The heavier the roof and the more snow weight it will need to support the closer together the load bearing rafters or trusses need to be.

Frameing for roof loads.

The dead load of a typical asphalt shingled wood framed roof is about 15 pounds per square foot. A clay tiled roof may have a dead load. Depending on your region you may need to design for a maximum snow load of anything between zero to 65 pounds per square foot or roughly 0 3 kpa. Framers stick building a hip roof you can learn a great deal about roof framing by understanding the concepts of framing a gable or shed roof.

The boca code recognizes this and allows you to use the horizontal projection of the roof when calculating snow loads. If you live in a region that gets winter snowfall contact your municipal building department to find out what maximum snow loads you need to design for. The gable roof hip roof gambrel roof flat roof shed roof mansard roof and many more custom roof types. There are several roof types.

All roof framing tables are organized by maximum snow load. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. The load increases with the use of heavier roofing material. 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.

For dead loads you are correct. Converting a flat roof to pitched. Boca also allows you to reduce the snow load for roofs with slopes greater than 30 degrees presumably because snow will slide or blow off steeply pitched roofs. 910 pounds per lineal foot.

50 psf x 14ft 700 pounds per lineal foot. 15 psf x 14ft 210 pounds per lineal foot. Converting a flat roof to a pitched roof is essentially framing a new roof for an average of 6 to 9 per square foot. The dead load on a roof includes the framing sheathing and roofing.

Roof framing depends on the type of roof you want to build. It is important to list live load dead load and total load separately because live load is used to compute stiffness and total load is used to calculate strength. Detailed flat to pitched roof conversion costs.