CEW Section Quiz 03

1. A steel beam fixed at one end and simply supported at the other creates a unit stress of 7,500 psi under what change in temperature? The coefficient of expansion = 6.5 x 10^-6 in/in-°F and the modulus of elasticity = 29,000,000psi.

2. A 10 ft cantilevered wood beam (E = 1,500,000 psi and I = 864 in⁴) is subjected to a uniform load of 10 kips/ft. What is the maximum deflection?

3. What is the deflection at the free end of a 18 ft. long cantilever steel beam with a point load of 12,000 lbs 8 feet from the free end? The beam is a W16x67, I = 954 in⁴, E = 29,000,000 psi

Use the following beam for questions 4 thru 7. L = 30 ft, X = 12 ft, and W = 25 kips/ft. E = Modulus of Elasticity (for steel use 29,000 ksi). I = Moment of Inertia (in⁴) = 1330 in⁴

4. What is the shear force at R₁?

5. What is the shear force at R₂?

6. What is the maximum bending moment?

7. What is the deflection at X?