Use LRFD and design the tension members of the roof truss shown in Figure below. Use double-angle shapes throughout and assume 10-mm-thick gusset plates and welded connections. Assume a shear lag factor of U = 0.80. The trusses are spaced at 9 meters. Use A36 steel and design for the following loads. Metal deck : 190 Pa of roof surface Built-up roof : 575 Pa of roof surface Purlins : 145 Pa of roof surface (estimated) Roof Live Load : 960 Pa of horizontal projection Truss weight : 240 Pa of horizontal projection (estimated)
1.Use LRFD and design the tension members of the roof truss shown in Figure below. Use double-angle shapes throughout and assume 10-mm-thick gusset plates and welded connections. Assume a shear lag factor of U = 0.80. The trusses are spaced at 9 meters. Use A36 steel and design for
the following loads.
Metal deck : 190 Pa of roof surface
Built-up roof : 575 Pa of roof surface
Purlins : 145 Pa of roof surface (estimated)
Roof Live Load : 960 Pa of horizontal projection
Truss weight : 240 Pa of horizontal projection (estimated)
2. Use A36 steel and design sag rods for the truss of Problem 1. Assume that, once attached, the metal deck will provide lateral support for the purlins; therefore, the sag rods need to be designed for the purlin weight only.
a. Use LRFD.
b. Use ASD.
Trending now
This is a popular solution!
Step by step
Solved in 6 steps
