What moments are created in the frame in Figure P11.26 by a temperature change of \(+80^{\circ} \mathrm{F}\) in girder \(A B C\) ? The coefficient of temperature expansion \(\alpha_{t}=6.6 \times 10^{-6}\) (in./in.)/ \(/{ }^{\circ} \mathrm{F}\) and \(E=29,000\) kips/in. \({ }^{2}\).

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1= 600 in.4 15' B I= 600 in.4 1 = 200 in. D 20 15