Problem 4 For the conditions shown in Figure P4. 7-11, select a double-angle section (3/8-in. gusset plate connection). Use A36 steel. 15-4 D=90k L-260 FIGURE P4.7-11
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- Use load and resistance factor design and select a W shape with a nominal depth of 10 inches (a W 10) to resist a dead load of 175 kips and a live load of 175 kips. The connection will be through the flanges with two lines of 11 4 -inch-diameter bolts in each flange, as shown in Figure P3.6-6. Each line contains more than two bolts. The length of the member is 30 feet. Use A588 steal.Select an American Standard Channel shape for the following tensile loads: dead load = 54 kips, live load = 80 kips, and wind load = 75 kips. The connection will be with longitudinal welds. Use an estimated shear lag factor of U = 0.85. (In a practical design, once the member was selected and the connection designed, the value of U would be computed and the member design could be revised if necessary.) The length is 17.5 ft. Use Fy=50 ksi and Fu=65 ksi. a. Use LRFD. b. Use ASD.A tension member with a length of 6 feet must resist a service dead load of 22 kips and a service live load of 55 kips. Select a member with a rectangular cross section. Use A36 steel and assume a connection with one line of 7/8-inch-diameter bolts. Use load combination Pu = 1.2D + 1.6L for LRFD.
- A 2L 3 x 2 x ¼ LLBB tension double angle, A36 steel is subjected to a dead load of 12 kips and a live load of 36 kips. It is attached to a gusset plate with a line of 3/4-inch diameter bolts through the long legs. Does this member have enough stamina? Assume Ae= 0.85 in. Use LRFD.4.9-1 Verify the value of ry given in Part 1 of the Manual for the double-angle shape 2L4× 31⁄2 × 1⁄4 SLBB. The angles will be connected to a 3⁄8 -inch-thick gusset plate.A channel shape, C8 × 18.75, is used as a tension member. The channels are boltedto a 10mm-thick gusset plate with 22mm- diameter bolts. The tension member is A572 Grade 50 steel (Fy = 345 MPa, Fu = 450 MPa) and the gusset plate is A36 (Fy = 250 MPa, Fu = 410MPa). What is the ult. capacity of the channel in kips, if yielding on the gross area governs? What is the ult. capacity of the channel in kips, if fracture on the net area governs?
- For following tensioned loads PD=80kips and PL=120kips and by using LRFD method, select the lightest WT6 channel shape to be used as a 20ft long. The member will be connected by a longitudinal weld to flange only (6in) in long at the end. Use A992 Grade (Fy= 50ksi and Fu=65ksi)A C7x9.8 tension member (A36) is connected to a 3/8-inch thick gusset plate (A36) as shown below. Compute the available block shear strenghth of the gusset plate for both LRFD and ASDA channel shape, C8 × 18.75, is used as a tension member. The channels are bolted to a 10mm-thick gusset plate with 22mm- diameter bolts. The tension member is A572 Grade 50 steel (Fy = 345 MPa, Fu = 450 MPa) and the gusset plate is A36 (Fy = 250 MPa, Fu = 410MPa). What is the ult. capacity of the channel in kips, if yielding on the gross area governs? What is the ult. capacity of the channel in kips, if fracture on the net area governs? What is the ult. capacity of the gusset plate in kips, if block shear governs? What is the effective net area of the channel section, in square millimeters?
- A WT10.5 x 31 is used as a bracket to transmit a 60-kip service load to a W14 x 90 column, as previously shown in Figure . The load consists of 15 kips dead load and 45 kips live load. Four 7⁄8-inch-diameter Group A bolts are used. The column is of A992 steel, and the bracket is A36. Assume all spacing and edge-distance requirements are satisfied, including those necessary for the use of the nominal strength in bearing deformation (i.e., 2.4dtFu)*, and determine the adequacy of the bolts for the following types of connections: (a) bearing-type connection with the threads in shear and (b) slip-critical connection with the threads in shear.Use A36 steel and select the lightest American Standard Channel for a tension member that will safely support a service dead load of 444.82 kN and service live load of 222.41 kN. The member is 6.1 m long, and it is connected through the web with two lines of 25 mm diameter bolts. The length of the connection is 150mm. a. Use LRFD b. Use ASDDesign a framed beam connection for a W18 x 50 to support a dead load reaction of 30 k and a live load reaction of 20 k, using the LRFD and ASD methods.The beam’s top flange is to be coped for a 2-in depth, and 7/8-in A325-X bolts in standard-size holes are to be used.The beam is connected to a W27 x 146 girder. Connection is A36,while W shapes are A992