A simple beam that is 18 ft long supports a uniform load of intensity q. The beam is constructed of two angle sections, each L 6 x 4 x 1/2, on either side of a 2 in. x 8 in. (actual dimensions) wood beam (see the cross section shown in the figure part a). The modulus of elasticity of the steel is 20 times that of the wood.
(a) If the allowable stresses in the steel and wood are 12,000 psi and 900 psi, respectively, what is the allowable load qallow?
(b) Repeat part a if a 1 in. x 10 in. wood flange (actual dimensions) is added (see figure part b).

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4 in. 6 in.7 8 in Steel angle wood beam in Wood flange in. Wood beam Steel angle in.