A redwood timber member having a 16-in.-square cross section is reinforced with an ASTM A3...

A redwood timber member having a 16-in.-square cross section is reinforced with an ASTM A36 structural steel angle  at each corner, as shown. The materials are so attached as to act as a single unit. Compute the total allowable axial compressive load that may be applied through a rigid cap plate that covers the entire cross-sectional area. Use dressed dimensions and assume the materials have the same length. The allowable compressive stress for the steel is 20,000 psi.

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