How to build a Bench Swing
A bit about the measurements
The measurements throughout this projects are given in both millimeters and inches.
The metric (mm) measurements are given first, followed by the imperial(inch) measurements in brackets.
For example: 50mm (2")
However, the metric (mm) sizes do not convert exactly to the equivalent imperial (inch) sizes because the measurements are rounded to their respective commonly called sizes.
Example: A piece of 2" x 4" wood in North America is the equivalent of a piece of 100mm x 50mm wood in Australasia.
2" x 4" is not exactly the same size as 100mm x 50mm.
Also note that in North America the narrower side of the wood is called first (2 x 4), where as in Australasia the wider side is called first (100 x 50).
When the same piece of wood is made smooth, or dimensioned (surfaced, dressed, planed), there is an even bigger discrepancy. 1 1/2" x 3 1/2" in North America compared to 90mm x 45mm in Australasia.
In this project the imperial measurements are suited to North America. The metric measurements are more suited to Australasia.
Wood and wood sizes
For the most part there are two different types of lumber used for in project: 90mm x 35mm (1-1/2" x 3-1/2") treated pine for the frame and 90mm x 20mm (3/4" x 3-1/2") hardwood for the seat slats and back slats.
Also a small amount of 140mm x 20mm (3/4" x 5-1/2") treated pine for the arm rest.
If the sizes vary in your area, just make allowances accordingly.
The 45mm x 35mm (1-1/2" x 1-3/4") pieces required are from 90mm x 35mm (1-1/2" x 3-3/4") stock ripped (sawn down lengthwise) in half.
Any other different stock sizes required can also be cut from standard stock.