A rigid bar AB of length L = 66 in. is hinged to a support at A and supported by two vertical wires attached at points C and D (see figure). Both wires have the same cross-sectional area (A = 0.0272 in.2) and are made of the same material (modulus E = 30 × 106 psi). The wire at C has length h = 18 in. and the wire at D has length twice that amount. The horizontal distances are c = 20 in. and d = 50 in.
(a) Determine the tensile stresses C and D in the wires due to the load P = 340 lb acting at end B of the bar.
(b) Find the downward displacement δB at end B of the bar.

2h