Table of Contents
Introduction and lumber requirements
This arbor is a solid construction with 100×100 (4×4) posts concreted into the ground, 100×50 (2×4) rafters, 50×50 (2×2) roof frame members and 50×50 (2×2) laths.
The overall height is approximately 2600mm (104″) although that can be changed to suit, and the footprint is 1100mm (44″) x 700mm (28″).
The pitch (angle, slope) of the rafters (off horizontal) is 45°.
That is: a rise of 1 in 1 (or 1/1), which means that the rafters rise 1 unit of measurement for every 1 unit of measurement along the horizontal plane (run).
In the United States the pitch is given in inches, with the run (horizontal plane) being 12 inches and the rise being a ratio of that. The slope of the rafters would be given as 12″ of rise over 12″ of run, which is still the same thing as a rise of 1 in 1 or 45°.
Note: This arbor has a relatively steep top. If you prefer an arbor that doesn’t have such a steep top, there is a similar arbor plan with a 18.4° pitch which is a rise of 1 in 3. To see click here.
Use lumber suitable for exterior use. Either smooth (dressed, surfaced) or rough wood can be used according to your own personal preference.
You will need….
- 4 of: 100mm x 100mm (4″x4″) posts 2400mm (8ft) long.
- 2 of: 100mm x 100mm (4″x4″) beams 1000mm (40″) long.
- 2 of: 100mm x 100mm (4″x4″) blocks 500mm (20″) long.
- 6 of: 100mm x 50m (2″x4″) rafters 1100mm (44″) long.
- 3 of: 50mm x 50mm (2″x2″) horizontal roof members 1100mm (44″) long.
- 6 of: 50mm x 50mm (2″x2″) diagonal roof members 350mm (14″) long.
- 3 of: 50mm x 50mm (2″x2″) vertical roof members 500mm (20″) long.
- 18 of: 50mm x 50mm (2″x2″) laths 1000mm (40″) long.
- 16.5m (55ft) of 25mm x 25mm (1″x1″) square stop to hold the lattice panel in.
- 2 lattice panels approximately 1550mm x 500mm (62″x20″).