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

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

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
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