Title: Footer volume
Posted: 05/14/2012 11:12 AM
Category: Carpentry General
Description:
Estimating Concrete for Footers
(To the nearest 1/4 yard)
1. Change width and thickness from inches to feet
(Width = twice the thickness)
· # inches ÷ 12 = inches in feet
2. Find the perimeter. (Must add once the thickness of the footer to the Length and Width of the house dimensions.)
3. # Yards = Perimeter x Thickness of Footer x Width of Footer
27
Ex: Find the number of cubic yards of concrete needed for a building with dimensions of 44’ x 28’. The foundation walls will be 9” thick.
a. Change Inches to Feet:
b. L of Footer = ___________________
W of Footer = ___________________
c. Perimeter = _____________________
d. Volume = ______________________
Ex: How many cubic yards of concrete will be needed for a house with dimensions of 22’ x 32’ if the foundation is 8” thick?