Determine the tensile design strength for W16x89 and two connected 1/4"x12 in plates, with two lines of 7/8-in diameter bolts in each flange using A 572 Grade steel with Fy=50 ksi and Fu=65 ksi as shown in Figure. There are three bolts in each line 3-in on center. Check block shear for plate only.

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)?