Roof Live Load Tables

For roof live loads of 12 psf or 16 psf.

Roof live load tables.

If your code book says your snow load is 40 psf then you use the 40 psf live load rafter table. If your code book says your snow load is 40 psf then you use the 40 psf live load rafter table. The fact that snow loads only act part of the year has been used to create the rafter tables. Actual load due to snow will depend upon the shape of the roof and its capacity to retain the snow.

And each case shall be treated on its own merits. The loads are based on adjusted roof snow loads from the governing building code. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. The live load on a roof is the weight of any temporary objects on the roof.

Loads should be determined in accordance with this chapter. Where snow isn t a problem the live load can come from people working on the roof and any equipment they. The snow load is treated as a live load when you use af pa s tables. The snow load is treated as a live load when you use awc s 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.