Segment A of the composite beam is made from 2014-T6 aluminum alloy and segment B is A-36 steel. The allowable bending stress for the aluminum and steel are sigma (al)ₐₗₗₒ = 15 ksi and sigma (steel)ₐₗₗₒ = 2 ksi. What is the allowable bending stress for the aluminum alloy?
