Fink trusses spaced at 20 feet on centers support W6 x 12 purlins, as shown in Figure The purlins are supported at their midpoints by sag rods. Use A36 steel and design the sag rods and the tie rod at the ridge for the following service loads. Metal deck: Built-up roof: Snow: Purlin weight: 2 psf 5 psf 18 psf of horizontal projection of the roof surface 12 pounds per foot (lb/ft) of length

Fink trusses spaced at 20 feet on centers support W6 x 12 purlins, as shown in Figure The purlins are supported at their midpoints by sag rods. Use A36 steel and design the sag rods and the tie rod at the ridge for the following service loads. Metal deck: Built-up roof: Snow: Purlin weight: 2 psf 5 psf 18 psf of horizontal projection of the roof surface 12 pounds per foot (lb/ft) of length

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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Concept explainers

Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.

Question

Use LRFD.

Fink trusses spaced at 20 feet on centers support W6 x 12 purlins, as shown in
Figure The purlins are supported at their midpoints by sag rods. Use A36
steel and design the sag rods and the tie rod at the ridge for the following service
loads.
Metal deck:
Built-up roof:
Snow:
Purlin weight:
2 psf
5 psf
18 psf of horizontal projection of the roof surface
12 pounds per foot (lb/ft) of length
46.6
2 (a
12' = 24'
42′
90'
2 (@
12'-24'

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