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Unformatted text preview: welds. Make sure the slenderness ratio does not exceed 300. Problem 3: (25%) A 29feet long column carries a 75 kips dead load and a 175 kips live load. It is in a braced frame, with both top and bottom pinned, and has an additional lateral support at midheight in the weak direction. 1. Select the lightest A572 Gr. 50 Wsection. 2. Select the lightest A572 Gr. 65 section. Problem 4: (25%) Column AB is a W14x176 A572 Gr. 50 section. It carries a 385 kip dead load and a 1125 kip live load. It is a part of an unbraced frame, shown. In the plane perpendicular to this frame, the column bends about its weak axis and is supported laterally at points A, B, C and at midstoryheights. Is such column AB adequate according to the AISC LRFD Code? 40' 40' 40' 14' 14' W16x89 beams W16x89 beams W14x176 A572 Gr 50 column A B C W14x176 A572 Gr 50 column...
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 Spring '09
 CHOW
 Column, Tensile strength, Buckling, Dead and live loads, Compression member, kips

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