simple beam with a span of 14 ft supports a uniformly distributed dead load of 300 lb/ft and a uniformly distributed live load of 500 lb/ft. A 10 × 14 beam of Douglas fir–larch of select structural...

simple beam with a span of 14 ft supports a uniformly
distributed dead load of 300 lb/ft and a uniformly distributed live load
of 500 lb/ft. A 10 × 14 beam of Douglas fir–larch of select structural
grade is used. Is the beam safe with respect to shear stress?