11. (10 points) Check to determine if a W14x159 used as a column can support an...
A HSS 12x 8 x % with Fy 46 ksi is used as a column member. The length of the member is 15 feet. Both ends are pinned, and there is an additional support against the weak axis buckling at a point 6 ft. from the top (Fig. P3). Determine the design compressive strength of the column for LRFD. 15' y-axis x-axis Fig, P3
2. Design Wide flange column section only of A992 steel to serve as a pinned- end main member column 30 ft long to carry an axial compression loads in a braced structure, based on AISC LRFD method. The dead load is 50 kips A992 13-0" and live load is 70 kips. The member has strong axis direction supported at 17ft height from the bottom of the column. Dead load is 20 kips and live load is 40 kips. Assume the...
Column Design for Compression Given: A column supports vertical loads Species and Grade: DF-L Select Structural Column Size 6x10 Axial dead load, PD 5 kips Axial snow load, Ps 15 kips Column length, L = 16 feet The column is not braced about either axis The column is pinned top and bottom, k 1.0 CM = 1.0, Ct = 1.0, Ci = 1.0 Design load combinations to be considered: D+ S Find Determine the allowable axial load for each of...
Effective Length 4.7-2 An, HSS 10 x 6 x yis with F 46 ksi is used as a column. The length is 15 feet. Both ends are pinned and there is support against weak axis buckling at a point 6 feet from the top. Determine a. the design strength for LRFD. b. the allowable stress for ASD.
Please complete the 3 design problems. Problem 1. Select the lightest W12 section available to support working tensile loads of PD - 250k and PL - 325k. The member is to be 30ft long and is assumed to have two lines of holes for 1-inch bolts in each flange. There will be at least three bolts in each line 4-in on center. Neglect Block Shear Problem 2. Select the lightest available W12 section to support the axial loads PD -...
Column Design for Flexure and Compression Given: An exterior column supports vertical and wind loads Species and Grade: DF-L Select Structural Column Size 6x10 Wind load causes bending about strong axis Axial dead load, PD 5 kips Axial snow load, Ps 15 kips Uniform wind load, Ww-200 р.l.f. Column length, L 16 feet The column is not braced about either axis Column is pinned top and bottom, k 1.0 CM-1.0, Ct 1.0, Ci- 1.0 Design load combination to be considered:...
A W8x35 is used as a column. The weak axis is braced at 28 ft from the bottom and the bottom end condition is fixed in all directions. The top is pinned in all directions and weak axis bracing is pinned. Find the critical load of buckling and the critical stress of buckling. Total Length = 50ft. rx=? ry=? Pcr=? (P/A)cr=?
Problem 2. Design and select an ASTM A992 (Fy" 50 ksi) W-shape column to carry an axial dead load of 140 kips and live lond of 420 kips. The column is 30 feet long, and is pinned top and bottom in both axes. In addition, the column is laterally braced about the y-y axis (local weak/minor axis of the section) and torsionally braced at the midpoint. Limit the column size to a nominal 14 in. shape, that is W14 shape...
rx, ry, Pcr, (P/A)cr? A W8x35 is used as a column. The weak axis is braced at 28 ft from the bottom and the bottom end condition is fixed in all directions. The top is pinned in all directions and weak axis bracing is pinned. Find the critical load of buckling and the critical stress of buckling. Total Length = 50ft.
Problem#2 A W12 x58, A992 column is pinned at the top and fixed at the bottom as shown. Lateral bracing is provided to assist with weak-axis buckling strength 12.5 ft from the ground level. For the condition where the column only supports axial load, determine the design strength of the column. K 1.0 7.5 ft K- 0.8 20 ft K = 0.8 | 12.5 ft