The strut AB made from two bars (thickness of each bar = 0.50 in) is connected to a rectangular beam CD (b= 0.80 in x h = 7.5 in) at joint B. The beam carries a concentrated load of 2750 lb at the end joint D. (a) determine the minimum diameter of the bolt at B if the shearing stress in the bolt is not to exceed 14000 psi. (b) determine the minimum diameter of the bolt at B if the allowable bearing stress in the bar plate is 20000 psi. Detail of joint B 3 ft C A 5 ft *+ O B 6 ft D 2750 lb 3.75 in 3.75 in 0.80 Strut AR in in Beam CD (b Xh) Bolt (dmin) 0.50 in

The strut AB made from two bars (thickness of each bar = 0.50 in) is connected to a rectangular beam CD (b= 0.80 in x h = 7.5 in) at joint B. The beam carries a concentrated load of 2750 lb at the end joint D. (a) determine the minimum diameter of the bolt at B if the shearing stress in the bolt is not to exceed 14000 psi. (b) determine the minimum diameter of the bolt at B if the allowable bearing stress in the bar plate is 20000 psi. Detail of joint B 3 ft C A 5 ft *+ O B 6 ft D 2750 lb 3.75 in 3.75 in 0.80 Strut AR in in Beam CD (b Xh) Bolt (dmin) 0.50 in

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

Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.

Question

=
The strut AB made from two bars (thickness of each bar = 0.50 in) is connected to a rectangular beam CD (b
0.80 in x h = 7.5 in) at joint B. The beam carries a concentrated load of 2750 lb at the end joint D. (a) determine
the minimum diameter of the bolt at B if the shearing stress in the bolt is not to exceed 14000 psi. (b) determine
the minimum diameter of the bolt at B if the allowable bearing stress in the bar plate is 20000 psi.
Detail of joint B
3 ft
(O
с
A
5 ft
O
B
6 ft
D
2750 lb
3.75 in
3.75 in
0 in
0.80
Strut AB
Beam CD (b Xh)
Bolt (dmin)
-0.50 in

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