Using ASD, select the lightest double-angle tension member to resist a service dead load of 30 kips and service live load of 90 kips. Use A36 steel. The member will be connected with two (2) lines of 7/8-inch Ø bolts, A325, placed at the usual gauge distances. There will be more than three (3) bolts in each line. The member is 25 feet long and will be connected to a 3/8-inch thick plate.

Problem 3. An un-equal leg angle L8x4x2 made of ASTM A242 steel (Fy = 50 ksi, Fu = 70 ksi) is used as a tension member and connected to a gusset plate as shown in Figure 2 (a to d). ASABINCAT SALLALALALALALALALAL w₁ Weld * Gusset Rate 3 (c) Longitudinal and transverse welds O 18x4x2 Gusset Plate Steel Type: A242 18x4x2 bolts: 3/4 dia. Steel Type: A242 T (d) Bolted connection (d) Calculate factored fracture strength of the tension member in Figure 2(c). (e) Calculate factored fracture strength of the tension member in Figure 2(d). (f) What is the maximum permissible length for this tension member?

Please answer all the questions with a complete solution. thank you.

The plate shown is attached by using three M12x2 grade 8.8 bolts. Which screw is subjected to the largest stress? What safe load ( static) F can be supported by the screw for n=1.5.