The timber in the foreground is Agathis (aka New Zealand Kauri Pine). Behind it are Silky Oak and Sheoak.
Each board is 80mm wide, 19mm thick and were delivered cut roughly to just over 600mm (for ease of handling). They first need to be all cut to the same length.
The boards are first cut to length using a saw table, and the simple jig shown to the right. An extension is clamped to the sliding protractor, and a stop block is clamped to the extension at the desired length. I selected the shortest board, trimmed the ends to ensure they were cut square, and used this to set the position of the stop block. Then each board can be simply placed up against the stop block an cut to the same length without having to measure each individual board.
The timbers have all been cut to length.
(The slight angle on the left appears to be distortion of the image due to the camera angle, the boards are all square, and cut to the same length)