40x68x36=97,920 in.^3 1728in.^3 per 1ft^3 in volume 97920/1728=56.7 ft^3 of concrete in volume 27ft^3 per 1 Yd^3 in volume 56.7/27=2.1 yd^3 of concrete to fill the hole You can not order exactly 2.1 yards of concrete though. I think they only go up by half yard increments.
There is no way to calculate cost for a square foot of concrete (?" w x ?" l). In order to calculate cost you need to first calculate volume which requires a third dimension of height (?" w x ?" l x ?" h). Concrete is usually sold by the cubic yard (36" wide x 36" long x 36" high). Another factor in calculating price of concrete is distance to delivery location.
25 Yards of concrete
Not square yards, but Approx. 5.24 cubic yards 54'2" = 650" x 7'10" = 94" x 4" = 4" = 244,400 cubic inches / 46,656 cubic inches = 1 cubic yard (36" x 36" x 36")= 5.24 cubic yards
Concrete never fully cures, but a non-quicksetting concrete should be firm on the surface in about 4-8 hours, and usable for foot traffic or post setting in 36 hours.
between 36 thousand and 40 thousand
For a hole 36" deep X 18" diameter, you would need approx. 1/5 cu. yd. concrete.
Depends on the length of the hole.
If the post is a 6 x 6 you will need about 1/10 of a yardof concrete
I use one bag to 1 1/2 bags per hole and fill the rest of the way back with tamped topsoil... whatever came out of the hole.
That depends on how deep (thick) you need it to be. You'll need 1 yard of concrete for every 3/4 inch of thickness of the pad.
The electrical is down at 36". It should not affect your driveway.
Based on your dimensions and a standard 3.5" to 4" thickness you will need 7 yards of concrete.
If the hole is a square then there is 36 cubic feet of dirt in the hole.
There is no way to calculate cost for a square foot of concrete (?" w x ?" l). In order to calculate cost you need to first calculate volume which requires a third dimension of height (?" w x ?" l x ?" h). Concrete is usually sold by the cubic yard (36" wide x 36" long x 36" high). Another factor in calculating price of concrete is distance to delivery location.
I make it 12.2 cubic yards.
Just find the volume of the sidewalk. First get everything into Feet. Divide 4 by 12 and get 1/3' which is about .3333'. Now just multiply 36*5*.3333=60 ft.³
It depends on the concrete company you're working with. You need 33 yards of concrete. Concrete companies deliver the stuff in full truckloads - and no, this is NOT a job for Sakrete. If you can find a company that has Oshkosh front-load mixers, you'll need three truckloads because those trucks hold 11 yards. If you can only find companies with rear-load mixers, you need 36 yards because a rear-load mixer holds 6 yards of concrete.