How Much Cement for an Outdoor Inground Basketball Pole?

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Make sure your basketball pole will last by making it a permanent structure in the ground. Portable basketball goals are easily blown over by winds or pulled down by slam dunks, but a permanent structure will last through the rigors of play and the effects of the environment. A critical part of the construction is never seen by the players. The footing under the base of the pole in cement determines whether or not the basketball goal pole will be stable. Ensure that it is with the right amount of cement in the footing.

Size of the Goal

  • Not all basketball goals are the same height and weight. Some are built lower for children, but others prefer goals 10 feet off the ground. Long J-bolts hold the base of the basketball goal in the concrete foundation. The taller your basketball pole, the deeper into the ground you will need to dig the hole. A deeper hole will require more cement.

Depth of the Hole

  • How deep you dig the hole for your basketball goal will depend on your region. The bottom of the concrete needs to be lower than the depth where the ground freezes in your area. Usually holes for supporting basketball posts will be between 36 and 48 inches deep.

Calculating the Volume

  • You will need to determine the volume of the hole with some calculations. Measure the depth and width of the hole. Divide each number by 12 to find the width and depth in feet. Divide the width in half to determine the radius. Multiply the radius by itself then multiply the result by pi, approximated at 3.14. Take this number and multiply it by the depth of the hole to find the volume in cubic feet.

Determining Cement Amount

  • Concrete is purchased by the cubic yard. Divide the volume of the hole in cubic feet by 25 to find the volume in cubic yards and to factor in an 8 percent overrun for mistakes. If you want to find the exact volume without the extra, divide the volume in cubic feet by 27.

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References

  • Black & Decker The Complete Guide to Backyard Recreation Projects: Sports Courts & Outdoor Games Play Structures & Treehouses Outdoor Entertainment; Eric Smith
  • Creative Homeowner's Ultimate Guide to Home Repair and Improvement: 325 Step-By-Step Projects 3,300 Photos and Illustration; Creative Homeowner
  • Photo Credit Jupiterimages/Comstock/Getty Images
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