Homework answers / question archive / The roof structure shown below consists of trusses spaced uniformly, 20 ft (6 m) on center, along the length of the building and tied together by purlins and x-bracing

The roof structure shown below consists of trusses spaced uniformly, 20 ft (6 m) on center, along the length of the building and tied together by purlins and x-bracing

Electrical Engineering

Share With

The roof structure shown below consists of trusses spaced uniformly, 20 ft (6 m) on center, along the length of the building and tied together by purlins and x-bracing. The roofing materials are supported by the purlins which span between trusses at the truss joints.

Consider the following loadings: Dead load: roof material, purlins, truss members, estimated at 15 psf (720 Pa) of roof surface Snow load: 20 psf (960 Pa) of horizontal projection of the roof surface Wind load: windward face 12 psf (575 Pa), leeward face 8 psf (385 Pa) normal to roof surface

Determine the following quantities for the typical interior truss:

(a) Compute the truss nodal loads associated with gravity, snow, and wind. (b) Use computer software to determine the member forces due to dead load, snow load, and wind. Tabulate the member force results.