1.A 4 X 12 (S4S) hem-fir timber beam carries a superimposed uniformly distributed load of 325 lb/ft on a simple span of 12ft. Determine the maximum bending stress and the maximum shear stress, and compare with the allowable stresses. Be sure to include the beam weight.
2.A Timber power-line pole is 10 in. in diameter at its base where it is solidly embedded in concrete. The pole extends 20 ft vertically upward from its base and is subjected to a horizontal pull of 300 lb at its top. Calculate the maximum bending stress and the maximum shear stress produced in the pole.
3.If the allowable shear stress is 100 MPa, calculate the maximum shear force V that a W460 X 60 structural steel wide flange is capable of resisting. Use the average web shear approach.