Live Load On Roof Truss

Floor live load 40 psf.

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. The live load on a roof is the weight of any temporary objects on the roof. 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. Deep floor trusses at 24 o c.

Live loads are not always present. The live load shall be taken as follows. Dead loads are always present. I for sloping or flat roof with slopes up to and including 10 degrees.

Live loads on roof trusses. Roof truss basics roof trusses are engineered wood alternatives to hand framed rafters. They support live and dead loads by efficiently transferring the loads to the building walls or supports. Sec 07 version 2 0 handout section 07 codes load types problem 3 given.

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. 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. 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. Examples of live loads are snow wind rain and temporary construction loads.

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. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of. 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.