I didn't follow the plans very closely (my bolts and dimensions were different) - I just used the general layout of the stepladder as a guide.
This was the first project I've made using a tablesaw. You could make this stepladder with a circular saw or even a handsaw, but I found the tablesaw made precision cuts really easy.
In this instructable I also describe how to use a router to make dado joints and consistent curved corners.
Step 1: Materials
You'll need a sufficient quantity of reasonable quality wood - I used about 7 planks of white pine, measuring 90 x 20 x 900 mm
8 x M8 carriage bolts, about 55 mm long
8 x M8 washers
8 x M8 lock washers
I used carriage bolts which have a large dome head, this means you only need a washer on the end with the nut.
The lock washers are needed because the bolt are inside a moving joint. Without the lock washers the nuts would gradually undo themselves.
M6 bolts would have worked fine too.