Dozer Productivity

Module $4$ Homework

Name: $q,$

This HW evaluates your ability to properly use the CAT dozer productivity estimation. Refer to the CAT handbook pg$.16-9$ to $16-17.$ And, given facts shown below, answer the questions:

Facts:

Assume that the contractor selects a CAT D$11$ tractor with an $"$U$"$ blade.

The average dozing distance for the job will be $250$ feet and the gradient will be about $10\%$ uphill.

The material will be "loose stockpile".

A slot dozing technique will be used by an "poor" operator.

The material has a loose density of $2,000$ lbs $($i$.$e$.,$ material weight of $2000lbs$ per LCY$)$

Visibility issues are expected due to inclement weather.

The job efficiency is assumed to be $40$ minutes per hour.

Question $1)$ Under these conditions, with the CAT machine, what will be the estimated contractor's hourly production rate in LCY$/$hr$?$

Make sure you list all correction factors used in the calculation with indicating where individual factor comes from $($e$.$g$.,$ Average operator technique $=x.,$ Material density correction $=$ x$.$xx$,$ etc.$)$; otherwise, you won't get full credit.

Question $2)$ If a load factor of $0\mathrm{.}85$ is applied, what would be the production rate in $BC\frac{Y}{h}r?$