Live Load On Roof Truss

Or the 25 psf snow load could be entered as a roof snow load with the unbalanced snow loading option turned off.

Live load on roof truss.

The live load shall be taken as follows. Examples of live loads are snow wind rain and temporary construction loads. Floor live load 40 psf. Live loads are not always present.

Dead loads are always present. A when access is provided 1500 n m 2 b when access is not provided 750 n m 2 except for maintenance ii sloping roof with slope greater than 10 degrees. The live loads a truss is required to bear are determined by local building codes. Roof truss basics roof trusses are engineered wood alternatives to hand framed rafters.

In other words on a steep roof less material would be stacked in a concentrated area at one time to avoid having it slide off. I for sloping or flat roof with slopes up to and including 10 degrees. Where snow isn t a problem the live load can come from people working on the roof and any equipment they take on to the. They support live and dead loads by efficiently transferring the loads to the building walls or supports.

The live load on a roof is the weight of any temporary objects on the roof. Sec 07 version 2 0 handout section 07 codes load types problem 3 given. 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. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of.

In my region on cape cod we have a ground snow load design of 25 psf which is a greater design load than the live load 12 psf to 20 psf over an entire roof system. Deep floor trusses at 24 o c. If the bottom chord of a roof truss functions as a floor joist such as in an attic room it carries a live load that also varies by use but a typical live floor load for a residential space is about 40 pounds per square foot.