An A36 (Fy=248MPA) W12x79 fixed-hinged columnof 4.29m length is laterally supported at mid-height on its weaker axis. If LL=2DL, calculate themaximum service Liveload in KN that the columncan carry using LRFD. Use ASEP Steel Manual forWF section properties. Express your answer in 2decimal places.

Given data: Fy=248MPa (W12x79) l = 4.29m = 14.07' LL = 2DL

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Engineering

Civil Engineering

maximum service Liveload in KN that the column

Steel Design (Activate Learning with these NEW titles from Engineering!)

6th Edition

ISBN:9781337094740

Author:Segui, William T.

Publisher:Segui, William T.

Chapter5: Beams

Section: Chapter Questions

Problem 5.5.11P

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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

An A36 (Fy=248MPA) W12x79 fixed-hinged column
of 4.29m length is laterally supported at mid-
height on its weaker axis. If LL=2DL, calculate the
maximum service Liveload in KN that the column
can carry using LRFD. Use ASEP Steel Manual for
WF section properties. Express your answer in 2
decimal places.

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