Question: The frame AD is supported by a pin connection at A and by the threaded rod spanning BC with a pin connection at C.

The frame AD is supported by a pin connection at A and by the threaded rod spanning BC with a pin connection

The frame AD is supported by a pin connection at A and by the threaded rod spanning BC with a pin connection at C. The frame is composed of C- channel that is 1/8" thick. The frame supports a 250 lbf load suspended from an 0.25" diameter cable connected to the frame at D. Side views of pin assemblies at A and C are shown. The fastener assembly at B consists of a nut screwed onto the threaded rod. Both the threaded rod and nut are size 3/8-24 UNF Find the following average stresses (hints in parentheses): Average shear stresses in the pins at A and C (first find the total reaction force at each pin). Average normal and shear stresses at cross-sections EE and FF (draw FBDs with cuts at each). Average normal stress in the cable at D that supports the weight. Average normal stress in the threaded rod (use the equivalent "tensile area" for this calculation). 25in 5 3 H|||| B 25in E 40in C 3/8-24 UNF Rod -0.25" 250lbf Pin A Pin C Cross Section EE 1/8in 0.375" 3/8-24 UNF Rod 2in 0.25" 1in

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