How to put a trampoline on a slope

Written by scott knickelbine
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How to put a trampoline on a slope
A trampoline must be kept level for the safety of the users. (kids jumping image by sonya etchison from Fotolia.com)

A trampoline that tilts can throw the jumper off the side. The safest surface on which to erect a trampoline is a perfectly flat, level lawn; unfortunately, not very many lawns meet that criterion. But if your lawn slopes less than 2.5 cm (1 inch) for every 17.5 cm (7 inches) horizontal distance, you can correct for this by digging trenches into the up-slope legs. This can take some checking and rechecking, but it's worth it to have the safest possible trampoline set-up.

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Things you need

  • Trampoline
  • Flat plank as long as the width of the trampoline
  • Carpenter's level
  • Ruler
  • Narrow trenching shovel

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Instructions

  1. 1

    Set the trampoline in the area in which you will use it. Set a plank across the middle of the trampoline, so that in runs straight up and down in the direction of the slope.

  2. 2

    Stand on the downslope side of the trampoline, and place the carpenter's level on the plank. Raise the end of the plank until the carpenter's level shows that the plank is level (the bubble is in the centre of the two lines). Use the ruler to measure the distance between the top of the trampoline and the upper edge of the board. This is the total amount of slope you need to correct.

  3. 3

    Divide the diameter of the trampoline by the total amount of slope. If the result is greater than 17.5 cm (7 inches), the area has too much slope to be corrected for the trampoline; you should move the trampoline to a different location.

  4. 4

    Move the trampoline out of the way and dig a trench under the area where the uphill legs of the trampoline will be placed. The depth of this trench should equal the total amount of slope you measured. Use the carpenter's level to make sure the trench is level.

  5. 5

    Move the trampoline back to its original position, with the uphill legs in the trench. The trampoline will be somewhat unstable because the side legs will now be higher than the uphill and downhill legs. Dig trenches under the side legs until both the uphill and downhill legs are seated firmly.

  6. 6

    Check that the trampoline is now level in all directions, and adjust the trenches if necessary.

Tips and warnings

  • If your trampoline is placed on soft or sandy soil, you may need to place about 2.5 cm (1 inch) of gravel in the trenches to keep the trampoline from settling during use.
  • Some people opt to dig a round, level hole about 7.5 cm (3 inches) deep to accommodate the entire trampoline base. This makes it easier to mount the trampoline and somewhat reduces the danger of a fall, but it involves a lot more digging.
  • Work slowly and check level frequently as you dig your trenches. It's easier to deepen a trench than to firmly refill one that's too deep.

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