sitework ( cost & estimating )

CSMT 442: Cost and Estimating 2

Homework 2 `Siteworks (20 points) Answer ALL Questions

1. A large stockpile of materials (5400CY) is to be transported to a fill area. The contractor has a rubber-

tired front loader and a number of dump trucks for the job. Based on a study of the job and knowledge of

the operators, time factors for various steps have been determined and are given below along with cost

and capacity factors. Determine the optimum number of dump trucks to assign to the job and duration

and cost of transporting the whole stockpile.

Front loader: cost per hour with operator $70

Total time to load truck 4 minutes

(not including position time)

Truck Cost per hour with driver $60

Positioning time 1 minute

Loading time 4 minutes

Travel to dump 6minutes

Dump time 2 minutes

Return travel 5 minutes

Truck capacity 6 CY