Seven alumni from the University of Arizona's mining and geological engineering program competed in the alumni division, coming in second place. The competition commemorates the 91 miners who died in the 1972 Sunshine mine disaster and continues to honor all miners who have lost their lives while on the job.
Place concrete at a minimum thickness of 4 inches. Increasing the thickness from 4 inches to 5 inches will add approximately 20% to your concrete cost, but will also boost your driveway's load-carrying capacity nearly 50% , according to the Tennessee Concrete Association.lace concrete at a minimum thickness of 4 inches. Increasing the thickness from 4 inches to 5 inches will add approximately 20% to your concrete cost, but will also boost your driveway's load-carrying capacity nearly 50% , according to the Tennessee Concrete Association.
Thicker concrete is a good idea for driveways. I would like to see you install a minimum 5 inch thickness. Often contractors might try to tell you that a 4 inch thickness is sufficient. The cost to upgrade to a 5 inch thickness on an average driveway is chicken feed when you compare it to the total cost of the job.For example, if your driveway measures 720 square feet, a 4 inch thick pour will require 9 cubic yards of concrete.Increasing the thickness to 5 inches requires 11 cubic yards of concrete. The extra two yards of concrete will only cost about $130.00. (1999 pricing-adjust for inflation).hicker concrete is a good idea for driveways. I would like to see you install a minimum 5 inch thickness. Often contractors might try to tell you that a 4 inch thickness is sufficient. The cost to upgrade to a 5 inch thickness on an average driveway is chicken feed when you compare it to the total cost of the job.