3.8-4 Design the tension members of the roof truss shown in Figure P3.8-4. Use double-angle shapes throughout and assume 3-inch-thick gusset plates and welded connections. Assume a shear lag factor of U = 0.85. The trusses are spaced at 25 feet. Use A572 Grade 50 steel and design for the following loads. Metal deck: 4 psf of roof surface Build-up roof: 12 psf of roof surface Purlins: 6 psf of roof surface (estimated) Snow: 18 psf of horizontal projection Truss weight: 5 psf of horizontal projection (estimated) a. Use LPED http://www.jamarana.com
3.8-4 Design the tension members of the roof truss shown in Figure P3.8-4. Use double-angle shapes throughout and assume 3-inch-thick gusset plates and welded connections. Assume a shear lag factor of U = 0.85. The trusses are spaced at 25 feet. Use A572 Grade 50 steel and design for the following loads. Metal deck: 4 psf of roof surface Build-up roof: 12 psf of roof surface Purlins: 6 psf of roof surface (estimated) Snow: 18 psf of horizontal projection Truss weight: 5 psf of horizontal projection (estimated) a. Use LPED http://www.jamarana.com
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
![3.8-4 Design the tension members of the roof truss shown in Figure P3.8-4.
Use double-angle shapes throughout and assume 8-inch-thick gusset
plates and welded connections. Assume a shear lag factor of U = 0.85.
The trusses are spaced at 25 feet. Use A572 Grade 50 steel and design for
the following loads.
Metal deck: 4 psf of roof surface
Build-up roof: 12 psf of roof surface
Purlins: 6 psf of roof surface (estimated)
Snow: 18 psf of horizontal projection
Truss weight: 5 psf of horizontal projection (estimated)
a. Use LPER
htp://www.jamarana.com
b. Use ASD.
8'
8 @ 10' = 80'
FIGURE P3.8-4
www](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6769e9eb-e5d7-493f-828e-186efef09cdb%2Fc9c55e9a-2695-4739-bf31-4bcbfb375a09%2Fi2lhhq_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3.8-4 Design the tension members of the roof truss shown in Figure P3.8-4.
Use double-angle shapes throughout and assume 8-inch-thick gusset
plates and welded connections. Assume a shear lag factor of U = 0.85.
The trusses are spaced at 25 feet. Use A572 Grade 50 steel and design for
the following loads.
Metal deck: 4 psf of roof surface
Build-up roof: 12 psf of roof surface
Purlins: 6 psf of roof surface (estimated)
Snow: 18 psf of horizontal projection
Truss weight: 5 psf of horizontal projection (estimated)
a. Use LPER
htp://www.jamarana.com
b. Use ASD.
8'
8 @ 10' = 80'
FIGURE P3.8-4
www
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