Question $2(50$ Points$)$:

Estimate the cost of constructing $30$ columns $(30$ in $.$ by $30$ in $.$ with height of $5$ ft $\mathrm{.}6$ in $.).$ The

plywood and lumber for making formwork will be used two times $("2$ USE"$).$ The crew

installation hour is determined based on the fact that $4$ carpenters in the crew continuously work

to make form, erect form, and remove form $($carpenter labor productivity data given in Table $1).$

Helpers' cost can be estimated based on labor productivity data and hourly rate as given. The

number of helpers on the project varies from time to time, dependent on carpenters' needs. Note,

$45-$min hour efficiency factor needs to apply to labor productivity data in Table $1$ which

represents the normal circumstances at efficiency factor $1\mathrm{.}0.$

Table $1$: Labor$-$hours required per $100$ SFCA of column forms

Table $2$: Hourly Rates

Based on the provided information, estimate the crew work hours on this project.

Estimate the unit cost $($$ per SFCA$)$ for crew installation $($including carpenters, helpers,

and foreman$).$