Using LRFD determine the maximum service load Q (kips) (Q is a live load) at the mid-height of the beam-column shown that is part of a braced frame (BF) system.  Assume the member is hinged with respect to bending in both x and y directions at top and bottom.  Additionally, lateral support occurs in the weak direction at mid-height.  Axial compression service dead load is 100 kips and the live load is 150 kips.  The section is W12x136 and A36 steel.  Please determine Cb and use it to help your beam-column capacity.  Take Cm = 1.0.

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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.