4-18. Determine the direction 0(0° < 0 s 180°) of the force F = 40 lb so that it produces (a) the maximum moment about point A and (b) the minimum moment about point A. Compute the moment in each case. |3D A 2 ft F = 40 lb 8 ft

4-18. Determine the direction 0(0° < 0 s 180°) of the force F = 40 lb so that it produces (a) the maximum moment about point A and (b) the minimum moment about point A. Compute the moment in each case. |3D A 2 ft F = 40 lb 8 ft

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

4-18. Determine the direction 0(0° < 0 s 180°) of the
force F = 40 lb so that it produces (a) the maximum
moment about point A and (b) the minimum moment
about point A. Compute the moment in each case.
A
2 ft
F = 40 lb
8 ft

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We have to determine the value of maximum moment about point A and minimum moment about the point A so we have to compute moment in each case.

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