Calculate maximum tensile stress in wood and steel, and determine the implied safety factors of the wood and steel with respect to yield of steel or failure of wood. Use the least strength version of A325.

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Figure 1 shows a cross section of a beam
made of 3^×12^inchdimension lumber. There is a 3^×1/2^in.steel plate screwed into it on the underside. Figure 2 shows a
schematic of the loading. Each point load is 5760^lbf. The lumber is Douglas fir, and the steel is A325. Draw a load
function (you may use my sign convention or that of the book), a shear diagram,
and moment diagram. Calculate maximum tensile stress in wood and steel, and
determine the implied safety factors of the wood and steel with respect to
yield of steel or failure of wood. Use the least strength version of A325.
(Yield strength = 120 ksi)

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Figure 1.Schematic
diagram of a beam made of Douglas fir with a steel plate screwed into the
bottom surface.