Live Load On Roof Truss

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

Live load on roof truss.

Deep floor trusses at 24 o c. Roof truss basics roof trusses are engineered wood alternatives to hand framed rafters. I for sloping or flat roof with slopes up to and including 10 degrees. Dead loads are always present.

Floor live load 40 psf. Sec 07 version 2 0 handout section 07 codes load types problem 3 given. Live loads on roof trusses. 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.

The live load on a roof is the weight of any temporary objects on the roof. 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. They support live and dead loads by efficiently transferring the loads to the building walls or supports. Live loads are not always present.

If unbalanced snow loading isn t required or specified the truss designer may enter the 25 psf snow load as a top chord live load tcll set the load duration factor to 1 15 for snow and turn snow loading off completely. 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. The live loads a truss is required to bear are determined by local building codes. 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. 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. The live load shall be taken as follows.