The overhang beam is constructed using two 2-in. by 4-in. pieces of wood braced as shown...

The overhang beam is constructed using two 2-in. by 4-in. pieces of wood braced as shown. If the allowable bending stress is σ_allow = 600 psi, determine the largest load P that can be applied. Also, determine the associated maximum spacing of nails, s , along the beam section AC if each nail can resist a shear force of 800 lb. Assume the beam is pin-connected at A , B , and D . Neglect the axial force developed in the beam along DA .