1.Design the smallest circular spiral column to carry an axial service dead load of 200 k and live load of 300 k. Use fc ‘ = 3,000 psi and fy = 60,000 psi. Hint : For the smallest dimension, use 8% steel. It is desirable to use #11 steel to reduce the number of bars to be accommodated in a single row. 2. For the 8-ft-long braced column shown in Figure P17.6, determine the axial load strength and the moment capacity at an eccentricity of 5 in. in the larger dimension. Use fc ‘ = 4,000 psi and fy = 60,000 psi.
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