A beam is constructed of two angle sections, each L 5 x 3 x 1/2, which reinforce a 2 x 8 (actual dimensions) wood plank (see the cross section shown in the figure). The modulus of elasticity for the wood is Ew = 1.2 x 106 psi and for the steel is Es = 30 x 106 psi.
Find the allowable bending moment Mallow for the beam if the allowable stress in the wood is σw = 1100 psi and in the steel is σs = 12,000 psi.

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2 x 8 wood plank 5 in. in. Steel angles