estimating the cost for a foundation and footing
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Estimating the Cost for a Foundation and Footing
Estimating the Cost for a Foundation and Footing
• The Foundation
• The Footing
• Calculate and Convert
• Vertical Rebar
• Horizontal Rebar
• Total Cost
The Foundation
Base = 900 ft2 (36 x 25 ft) Calculate the required concrete and reinforcing rod
Foundation8in. thick8ft high
Volume of foundation = 8in. x 8ft x 122ft (perimeter)
The Foundation
Footing8in. thick16in. wide
Volume of footing = 8in. x 16in. x 122ft (perimeter)
The Footing
Calculate and Convert
Calculate
Foundation
Footing
759.0 ft3
Convert
Order 28.5 yards3 for foundation system
3in.in.
ft ft . ft
ft
18 8 122 650 6
12
ftft
yd( ) . yd
333
3
1750 28 11
27
3in. in.in.
in
ft . .
ft
ft ft
1 18 16 122 108 4
12 12
Vertical Rebar
A 10 ft long rebar piece is vertically placed every 3 ft
How many 10 ft pieces are needed for a 122 ft perimeter?
41 pieces
122ft3ft
40.7
Horizontal Rebar
6in. of each 10ft section of rebar is overlapped. Therefore assume a 9.5 ft length. Determine the number of pieces needed at 9.5ft.
How many 10 ft pieces are needed for 4 rows with a 122 ft perimeter?
122ft 49.5ft
51.4
Two rows of horizontal rebar are needed for the foundation and two for the footing.
52 pieces
Total Cost
Concrete Cost
28.5 yards3 x $98/yard3 = $2,793.00
Rebar Cost
93 pieces x $4.75 = $441.75
Total Cost
$2793.00 + $441.75 = $3,234.75
Note: This does not include labor, excavation, gravel, forming material, etc.
Estimating the Cost for a Foundation and Footing
• The Foundation
• The Footing
• Calculate and Convert
• Vertical Rebar
• Horizontal Rebar
• Total Cost
Image Resources
Microsoft, Inc. (n.d.). Clip art. Retrieved July 20, 2009, from http://office.microsoft.com/en-us/clipart/default.aspx