Key numbers
Front elevation
Runner
Foot starter
Foot end on the left. The same part is used at both feet. Make one per lane of its group at each foot.
Cross bar
Cut list
Build notes
- Cut one runner and three cross bars first. Dry fit a course on the ground and check the bend before cutting the rest.
- Notch depth changes the curve, so keep it consistent. Screw each centre crossing so runners cannot slide sideways along the bars.
- Fix a sole plate along each foot and bolt it through to the pallets. Join the pallets to each other so the deck holds the outward thrust.
- The vault racks easily along its depth. Brace the back face with diagonal slats.
- Strap the vault down against wind uplift.
- Fix battens over the outer high points before roofing.
- This tool calculates geometry only. It is not a structural check.