A 28 ft long column is pinned at the top and fixed at the bottom, and has additional pinned support in the weak axis direction at a point 12 ft from the top.Assume the column is part of a braced frame. Axial gravity loads are PD = 220 k and PL = 270 k. Choose the lightest W12 column.

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1. An A992 steel W150 x 22 column is braced at the top against both x and y displacement but not against rotation. It is also braced at the midpoint against y displacement and is fixed at the bottom. Apply a F.S. of 2 against buckling. Determine the maximum allowable force that the column can support without buckling or exceeding the yield stress. 3 m 4'm

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The W21 x 201 columns on the ground floor of the 5-story shopping mall project are fabricated by welding a 12.7 mm by 100 mm cover plate to one of its flanges. The effective length is 4.60 meters with respect to both axes. Assume that the components are connected in such a way that the member is fully effective. Use A36 steel. Compute the column strengths in LRFD and ASD based on flexural buckling.

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Please ans A and D

In the built-up girder shown below that has an unbraced length of 25 ft. (L-25 ft) and moment gradient factor of C,-1, determine the maximum flexural design strength. E-29000 ksi Fy-50 ksi PL 25x0.6" PL 35*0.3" PL 25x0.6"

A built up l-section has a total unsupported length of 6m. It is made up of 2 - 400mm x 12mm plates as flanges and 450mm x 12 mm plate as web. The plates are of Grade 40 steel (fy = 276MPa). Considering the local buckling of the stiffened and unstiffened slender elements, determine the ultimate axial load capacity of the built-up column for both LRFD and ASD. Use NSCP 2015 Specification and effective length factor k = 1.0. Properties of the built-up section: A = 15,000 mm² ly = 128.06 x 106 mm4 Ix = 6.035 x 108 mm4 rx = 200.58 mm ry = 92.40 mm What is the Slenderness Ratio? KL/r Using LRFD, what is the ultimate load capacity of the column? Express your answer in KN Using ASD, what is the allowable load capacity of the column? Express your answer in KN

The cantilever beam shown is aW10 × 77 of A992 steel. There is no lateral supportother than at the fixed end. Use an unbracedlength equal to the span length and determinewhether the beam is adequate. The uniform load isa service dead load that includes the beam weight,and the concentrated load is a service live load.