This process is intended for small non-structural repair or replacement of equipment with commercial projects where the building owner can obtain a permit to repair or replace the same or existing features of a building without architectural plans.
1 Mark the area that will need concrete and divide it into smaller areas. 2  Calculate its volume of the area after determining the shape of the area (see chart below) by multiplying in the height.  Convert the volume from feet to cubic yards to get the number of cubic yards of concrete youâll need.
The math to determine how many cubic yards of crushed stone you will need for a given number of tons follows: 1  Number of tons you need X 2000 pounds per ton = Number of pounds. 2  Number of pounds / pounds per cubic yard of material = Number of cubic yards needed.