To make one yard of concrete from 80# bags you will need about 40-45 bags. Each bag is about .67 or 2/3 cubic foot. you will need 27 cubic feet to make 1 cubic yard. Cheaper to have a redimix truck deliver, and a lot less work.
A British pound coin is 22.5 millimetres in diameter (0.89 inches) and is 3.15 millimetres thick (0.124 inches).
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How many square yards in a 20x18 feet 3 inches thick
one (1) cubic yard of concrete four inches thick will cover 80 sq. feet. 85 yards x 81 = 6885 sq. feet.
go to any search. and type in concrete calculater
The concrete typically used for driveway construction is around 4 inches thick.
Concrete driveways are no less than 3.5 inches to 4.5 inches.
A concrete driveway should be at least 4 inches thick to ensure durability and longevity.
4 To 6 inches
A British pound coin is 22.5 millimetres in diameter (0.89 inches) and is 3.15 millimetres thick (0.124 inches).
90 sq yds at 4" thick.
About 162sf.
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should be at lest 4 inches
10 yards
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