Two Structural Designs for a Large Public Monument in Indonesia

Essay

Two structural designs for a large public monument in Indonesia are under evaluation. Use the repeatability assumption and the CW method to determine which design should be selected if the service period of the monument is indefinite and the interest rate is 2% per year. $$\begin{array} { | l | l | l | } \hline \text { Alternative } & \text { A } & \text { B } \\\hline \text { Initial costs } & \$ 310,000 & \$ 325,000 \\\hline \text { Annual maintenance costs } & \$ 23,000 & \$ 24,500 \\\hline \text { Usual life, years } & 8 & 11 \\\hline\end{array}$$