(a) Find the horizontal deflection at joint \(B\) produced by the 40-kip load in Figure P8.14.

The area of all bars is shown on the sketch of the truss; \(E=30,000 \mathrm{kips} / \mathrm{in} .{ }^{2}\).

(b) To restore joint \(B\) to its initial position in the horizontal direction, how much must bar \(A B\) be shortened?

(c) If the temperature of bars \(A B\) and \(\mathrm{BC}\) increases \(80^{\circ} \mathrm{F}\), determine the vertical displacement of joint \(C . \alpha_{t}=6.5 \times 10^{-6}\) (in./ in.) \(/{ }^{\circ} \mathrm{F}\). The rocker at support \(A\) is equivalent to a roller.

Transcribed Image Text:

5 in. 2 in 15' 4 in. D 5 in. 2 in. 15' T 20' P = 40 kips