Tree fort designer
Fort
Size the fort.
Open fort, 8' x 8', deck 5' up, ages 5 to 12
No tree needed
The fort stands on its own posts and footings, so it goes where the yard is flat and open, at the height you pick, and nothing is bolted into a living tree.
4 posts on 2 beam lines, 2x8 joists, footings up to 21 in round, 12 in down, 8 knee braces checked for 683 lb sideways.
Roof
Pick the roof.
No roof
Ground snow 20 psf; rafters come from the IRC tables up to 70 psf.
Way up
Pick the way up.
Rung ladder, front, 20 in wide
5 rungs and the deck of 12 in at 80 degrees. Guard: climb-proof barrier, vertical balusters.
Swings
Add a swing set.
No swing set
Ground
Safety surfacing and starting points.
Playground wood mulch, 15.5 cu yd, $1,120
12 in of playground wood mulch over about 418 sq ft, the fort and 6' on every side: about 16 cu yd, $1,120, in the materials total.
- Fall height
- 5'
- Guard
- 38 in, climb-proof
- Way up
- 4 rungs
- Surfacing, 6 ft round
- 12 in wood mulch
- Materials
- $2,898
Drag to turn the fort · Scroll or pinch to zoom · Drag a handle to resize · Click the roof, the way up, the slide, a side or the swing set to change it