An easy to make Bench Seat
Step 1. Cut all the pieces
To begin with, cut all the pieces to length - cut all the pieces square to begin with. Do not do any angle cuts just yet.
There are only two different stock sizes.
From 3/4" x 2 3/4" (20mm x 69mm) stock, cut 14 pieces as follows:
(a) 13 pieces @ 48" (1200mm), (a1) 1 piece @ 16 1/2" (412mm).
From 1 1/4" x 2 3/4" (32mm x 69mm) stock, cut 10 pieces as follows:
(b) 2 pieces @ 23" (575mm), (c) 2 pieces @ 24" (600mm), (d) 2 pieces @ 31" (775mm), (e) 2 pieces @ 21 5/8" (540mm), (f) 2 pieces @ 25" (625mm).
Now the angle cuts.
Pieces (c), (d), and (e) need to be re-cut with angle-cuts. Six pieces in all need angle cuts.
Cut them according to the dimensions given in the drawing.
To help, there are angle patterns that can be printed out on the pages following the plans.
Just print them out, fold (or cut) along the lines and use them to mark the angles.
Of course you might not need the patterns. You might be quite capable of getting the angles by other means.