Step 1.1. The head side-frames.
The head side-frames were made out of 2" x 8" (200mm x 50mm) wood. They formed a 36"(900mm) square. The actual or finished size of the wood once dressed (planed or surfaced) was 1½ x 7½ (190mm x 45mm).
I cut four pieces of 1½ x 7½ (190mm x 45mm) wood, each slightly longer than 36"(900mm). Each piece needed a bevelled curve (compound cut) cut along the top edge.
I needed to make a pattern in order to mark the curved shape on the wood.
I drew a plan on a grid with the line spacings representing 1" or 25mm. This made it easy to transfer the shape onto a piece of cardboard in real size,
cut the cardboard, and then use that as a pattern to mark the wood.
Below is the grid plan with the line spacings representing 1" or 25mm.
All you need to do to make a pattern is to get a piece of cardboard 8" x 36" (200mm x 900mm) and draw a grid
with the line spacings 1" or 25mm apart. Then draw a curve, as shown above, onto the cardboard using the grid lines as points of reference.
For your information; the diameter of the curve is 5ft (1500mm).
Once I marked the wood, I clamped each piece securely to a saw horse for cutting.
The curve and angle was easy enough to cut (doing a few runs) using a circular power saw with its blade tilted 30° off square.
Note: The angle cut is outwards from the mark line - not inwards. See the drawing below.