I need to pour a new pad for my AC coil outside... I can figure the 3' x 3' x 4'' flat slab but I also dug straight down about 3 feet and about 10 inch circle to keep it from shifting with frost... How do I figure the 3' x 10'' column?
Concrete question...
- Thread starter P Dubya
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Cougar
Well-known member
Figure the area of the 10" circle x 36".
3.14 x r x r
3.14 x 5" x 5" x 36" = 2826 cubic inches.
You may be better off digging down 6-8" make a base of screenings with the fines. Water it, compact it good pour your slab on top of that.
3.14 x r x r
3.14 x 5" x 5" x 36" = 2826 cubic inches.
You may be better off digging down 6-8" make a base of screenings with the fines. Water it, compact it good pour your slab on top of that.
Last edited:
jvitez
Well-known member
Yup, calculate the volume of the cube and add the volume of the cylinder. LxWxH for the cube (I know, stating the obvious......
) and pi x r-squared x height for the volume of a cylinder.
cubic inches to cubic feet? LxWxH= 12x12x12=1728 cubic inches per cubic foot.
cubic feet to cubic yards? 3 feet per yard so 3x3x3= 27 cubic feet per cubic yard.
) and pi x r-squared x height for the volume of a cylinder. cubic inches to cubic feet? LxWxH= 12x12x12=1728 cubic inches per cubic foot.
cubic feet to cubic yards? 3 feet per yard so 3x3x3= 27 cubic feet per cubic yard.