Roof Live Load Tables

For roof live loads less than 20 pounds per square foot psf rafter spans and required e values tabulated for 20 psf shall be permitted to be adjusted in accordance with the fol lowing table.

Roof live load tables.

The loads are based on adjusted roof snow loads from the governing building code. Actual load due to snow will depend upon the shape of the roof and its capacity to retain the snow. The live load on a roof is the weight of any temporary objects on the roof. Where snow isn t a problem the live load can come from people working on the roof and any equipment they.

And each case shall be treated on its own merits. If your code book says your snow load is 40 psf then you use the 40 psf live load rafter table. 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. It the roof is subjected to snow load it should be designed for the actual load due to snow or lot the live loads specified in table 1 3 whichever is more severe.

The snow load is treated as a live load when you use awc s tables. The fact that snow loads only act part of the year has been used to create the rafter tables. The snow load is treated as a live load when you use af pa s tables. For roof live loads of 12 psf or 16 psf.

Loads should be determined in accordance with this chapter.