Asteel column with 4-in diameter supports a compressive load of 160-kips. the column rests on a 10-in by 10-in base plate with 1-in thickness, which in turn rest on a square 40-in by 40-in concrete slab with 6-in thickness. if (taiiow and tatiow in the steel are not to exceed 18-ksi and 9-ksi and in the concrete are not to exceed 3,000-psi and 1,200-psi respectively, and bearing stress on the soil be limited to 300-psi, determine whether all the dimensions given for the column, the base plate, and the concrete are adequate or not? 160-kips answers: all adequate, except plate thickness: minimum thickness t = 1.27-in

An external consultant recommends that a plant installs a bank of capacitors for power factor correction. this will reduce the peak electrical demand charges by an average of 93 kw every month. the plant current pays $13 per kw in peak demand charges. the capacitor bank will include 223 kw of fixed capacitors, and 183 of variable capacitors. the fixed capacitors cost $59 per kw, and the variable capacitors will cost $65 per kw. the consultant charges 21% of the equipment costs to install the capacitors. because this project will reduce the demand for the electric utility, they are prepared to provide a one-time rebate of $42 per kw of reduced demand. what is the simple payback period for this project (in years)?