11. The members of the roof truss shown in the accompanying figure have a cross-sectional area of approximately 25 in² and are made of Douglas-fir wood with a modulus of elasticity of E= 1.9 X 10^6 lb/in². Using ANSYS, determine the deflection of each joint, the stresses in each member, and the reaction forces. Verify your results. Also, replace one of the fixed boundary conditions with rollers and obtain the stresses in each member. Discuss the differ- ence in results. 500 lb 8.7 ft 500 lb 4 500 lb 24 ft 500 lb 500 lb ? 4.4 ft

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11. The members of the roof truss shown in the accompanying figure have a cross-sectional area of approximately

25 in^{2}

and are made of Douglas-fir wood with a modulus of elasticity of

E = 1.9 \times 1 0^{6} lb / in^{2}

. Using ANSYS, determine the deflection of each joint, the stresses in each member, and the reaction forces. Verify your results. Also, replace one of the fixed boundary conditions with rollers and obtain the stresses in each member. Discuss the difference in results

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