Table of Contents
Introduction and lumber requirements
This arbor is a solid construction consisting of 100×100 (4×4) posts concreted into the ground, 100×50 (2×4) rafters and 50×50 (2×2) laths.
The overall height is 2200mm (88″) although that can be changed to suit, and the footprint (overall area on the ground) is 1100mm (44″) x 700mm (28″).
The pitch (angle, slope) of the rafters (off horizontal) is 18.4°.
That is: a rise of 1 in 3 (or 1/3) which means that the rafters rise 1 unit of measurement for every 3 units 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. In this case, the slope of the rafters
would be given as 4″ of rise over 12″ of run, which is still the same thing as a rise of 1 in 3 or 18.4°.
Note: There is another similar plan with a 45° top if you prefer a steeper roof. To see click here
Use lumber suitable for exterior use. Either smooth (dressed, surfaced) or rough wood can be used. It is just a matter of 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.
– 3 of: 75mm x 25mm (1″x3″) rafter braces 600mm (24″) long.
– 6 of: 100mm x 50m (2″x4″) rafters 900mm (36″) long.
– 14 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″).