Situation 2. A W14x90 of A992 steel is used as a pin-connected column. The 30ft long column is braced at mid-height with respect to its weak axis. Determine the axial compressive load. (ASD & LRFD) 30ft Properties of W14x90: 15ft 15ft A = 26.5 in.² d = 14.0 in. by = 14.5 in. t₁ = 0.710 in. tw = 0.440 in. Tx = 6.14 in. ry = 3.70 in. by/2t, = 10.2 h/tw = 25.9

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2. Determine whether the compression member shown in Figure P4.3-7 is adequate to support the given service loads. a. Use LRFD. b. Use ASD. D = 560 kips L = 68 kips W12 × 79 A992 steel 20'

Situation 3. A W12x81 is used as a column. The effective length in either principal direction is 20ft. Using A992 steel, determine the axial compressive strength (ASD & LRFD). Properties of WT12x81: A = 23.9 in.² d = 12.5 in. by - 13.0 in. t = 1.22 in. tw = 0.705 in. 1x == 3.50 in. ry = 3.05 in. by/2t, = 5.31 d/tw = 17.7 y = 2.70 in. Ix = 293 in.* ly = 221 in. J = 9.22 in.

The following steel circular bar (Es = 200 GPa) is divided into two segments. Segment 1 is tubular and segment 2 is solid. Determine the distance "x" so that the bar does not exceed a total deformation of 2.5 mm. The load P is equal to 25 kN, the diameter d is equal to 30 mm, and the length L is equal to 10 m.

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Determine the safe load of the column section shown, if it has a yield strength of 25 MPa. E = 200000 MPa. Use NSCP Specifications. Fyz248 mpa Properties of Channel Section d = 305 mm t₂ = 7.2 mm A = 3929 mm² t₁ = 12.7 mm Ix=53.7 x 10mm¹ x = 117 mm Properties of W 460 x 74 A = 9450 mm² b = 190 mm ly= 1.61 x 10 mm x = 17.7 mm tw = 9.0 mm rx = 188 mm ry = 41.9 mm d = 457 mm tr = 14.5 mm Ix = 333 x 10 mm Iy = 16.6 x 10mm* 7.21 When the height of column is 6 m. When the height of column is 10 m. Assume K= 1.0 457 CIVIL ENGINEERING- STEEL DESIGN

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A WF section of A572 Grade 60 steel is used as a compression member. It is 7.7 meters long, fixed at both ends, and has additional support in the weak direction at a point 3.4 meters from the top. The member resists a service dead load of 800 KN and a service liveload of 1200 KN. WF properties: A=23,973mm2, rx=135mm, ry=68mm. Calculate the largest slenderness ratio of the column. Express your answer in 2 decimal places.