$($Chapter $6)$: Estimate the production rate in $b\frac{f}{h}r$ of the

entire process of loading, unloading and hauling lumber

on a construction site. The lumber will be hauled $5$ miles

at an average haul speed of $30$ miles per hour. The

average return speed will be $45$ miles per hour. A crew of

three laborers and one truck driver will be able to unload

and stack the lumber at $1,000$ bf per hour per worker. A

loader will load the trucks at the stockpile in $15$ minutes.

The capacity of the truck is $2,500$ board feet. $(15$ Points$)$

You have to calculate the inefficiency of a laborer for a

task. Assume the following per day.

a$.$ Determine the # of hours you must carry per shift

for each laborer

Assume:

Safety meeting $-15$ minutes

Two Breaks $-15$ minutes

Lunch $-30$ minutes

$10$ hour shift

b$.$ With the information above $(9.$a$)$ Determine the #

of hours you must carry per shift for each laborer

with a $80\%$ efficiency:

Assume:

Inefficiency factor $-80\%$