Things to Consider while Choosing Zip Line Anchors

If you are trying to setup a zipline in your backyard for the first time, then be warned; it can be a daunting task. Before setting up the zipline, you should select an appropriate location. Moreover, you need to make sure that the runway is clear for the zipline and that the anchors are sturdy at both the ends.

There are a few things that you need to consider while choosing the anchors for your zipline ride. For starters, you should never use:

  • Playground structures or buildings for anchors
  • Telephone or Power poles
  • Trees with rot, dead stumps, or trees with excessive lean
  • Trees in loose, sandy, and wet soil

This list is not complete and you should use your judgment in finding what is NOT suitable for an anchor point. Here is what else you need to consider.

Trees as Anchors

  • The tree trunks should have a minimum diameter of twelve inches. Make sure that you do not attach the zipline to any branch or limb other than the central trunk of the tree.
  • It is important to protect the health of the tree to preserve the structural integrity of the anchor. To do this, you can use tree saver blocks between the tree trunk and the zipline cable. A tree can starve to death if its bark is constricted by the zipline cable, but using tree saver blocks will help you avoid this issue.
  • You may also use eyebolts to secure the zipline. Eyebolts are less invasive to the health of the anchor tree than wrapped zipline cables. Make sure that the bolt penetrates completely to the tree trunk and the bolt should be reinforced with a washer and nut.

Posts as Anchors

  • Make sure that the posts you select for the zipline anchor have a diameter of at least twelve inches.
  • The post should be sunk at least ten percent of the length of the post, plus two feet in the ground. In addition to that, you should secure the post with at least six inches of concrete around it.
  • Do not imbed eye lag bolts partially to the post and expect it to hold the zip line and the rider. Make sure that the bolt penetrates the post entirely.
  • If the post is made of wood, eyebolts should be anchored twelve inches or lower from the top of the post.