Figure P3–38 represents a wood joist for a platform, carrying a uniformly distributed load of 120 lb/ft and two concentrated loads applied by some machinery. Compute the maximum stress due to bending in the joist and the maximum vertical shear stress.

Data in Figure P3–38 

Transcribed Image Text:

1.50 7.25 in Beam cross section Section A-A 300 lb 3 ft 12 ft 500 lb 120 lb/ft Distributed load - 3 ft A A