A 4 × 4 carries an axial compressive force caused by dead, live, and roof live loads. Lumber is No. 1 DF-L. CM = 1.0, Ct = 1.0, and Ci = 1.0.   Find: The allowable column load for each load combination if the unbraced length of the member is a. 3 ft b. 6 ft c. 9 ft d. 12 ft

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