How to Build a Spiral Staircase Around a Tree



Drill bits!!-!!!!-!!!!-!!!!-!! Pliers

1 by 8 by 24 inches of pressure-treated stair timber

Bolts with a diameter of half an inch and a length of one foot

T-nuts galvanised with a diameter of half an inch


Screws for wood, galvanised, 4 inches long

If necessary, the spiral steps that go around the tree may be strengthened by adding extra wood boards that are fastened directly to the tree.


The usage of spiral staircases is highly recommended for children’s forts and tree homes. In a manner very similar to that described before, one may construct little platforms onto the trees by constructing off of a few boards that are fastened to the tree in this manner. However, at any one moment, only a certain amount of weight may be put on these platforms.

It is imperative that you never construct spiral steps on a tree that have a drop of more than 8 feet, since falls from this heights have the potential to be exceedingly hazardous, leading to serious injuries or even fatalities.


It is important to do routine inspections of the stairs to ensure that they have not been compromised in any way, whether the wood has been affected by rot or insects or the metal has rusted.

Any outdoor space may be transformed into something out of Swiss Family Robinson with the addition of a spiral staircase built around a tree. When working with trees that are sufficiently big and using long bolts and t-nuts in the stages, this is an easy task to do. However, despite the ease with which these steps may be erected in the tree, they are not designed to support particularly heavy loads and are thus best suited for lower heights or lesser usage. In order for these stairs to be able to withstand the elements of the outside, the wood must be treated, and the t-nuts must be galvanised.

Utilizing a drill bit measuring 3/8 inches in diameter, make a hole in the tree measuring 6 inches in depth where the first step was performed. Slide a bolt with a diameter of 1/2 inch and a length of 12 inches into the hole. If required, use the pliers to tighten the bolt tightly until it is inserted a distance of six inches into the hole.

  1. Drill a hole with a diameter of half an inch in the middle of one end of a treated stair board that is one by eight by twenty-four inches. Put a T-nut with a 1/2-inch diameter into the hole using a hammer. Turn the bolt that holds the stair in place until the treads of the stair make contact with the tree.

  2. To prevent the stair board from spinning upward when it is walked upon, it is necessary to drill a galvanised screw measuring 4 inches into the tree slightly above the board located at the back of the stairway.

  3. Repeat this technique with each new stair board, placing it in the tree at an elevation that is eight inches higher than the previous step and leaving an eight-inch space between each step on the horizontal plane. Install the stairs all the way around the tree, being sure to stop at a height of no more than 8 feet from the ground.

  4. Repeat this process with each stair board, installing them in the tree 8 inches higher than the previous step with an eight inch gap horizontally between the steps. Continue to install the steps around the tree, going no higher than 8 feet off the ground.