Assume that the contractor selects a CAT D9T tractor with an “SU” blade.

• The average dozing distance for the job will be 350 feet and the gradient will be about 20% downhill.

• The material will be “hard to drift or cut”.

• A slot dozing technique will be used by an “average” operator.

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

• There will be no visibility issue.

• The job efficiency is assumed to be 50 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.xx, Material density correction = x.xx, etc.)

Question 2) If a load factor of 0.9 is applied, what would be the production rate in BCY/hr?

Answer rating: 100% (QA)

The detailed answer for the above question is provided below SOLUTION To calculate the estimated contractors hourly production rate in LCYhr Question 1 we need to consider various correction factors L... View the full answer