Let’s get going. First, the bare wall.
We have a 101.25″ rise and a maximum run of 43.75 inches. We cut the master stringer and lean it against the wall and hold up a hinge and fake tread to give you an idea of what will happen.
You can’t actually attach the hinge to the stringer or the stringer to the wall until you have used the master stringer to trace the other stringer. The SKIL 20V brushless circular saw is underpowered, and with the 2Ah battery it comes with, I can’t even cut a single stringer. Thus the delay in getting the stringers and treads cut.
I’m worried about how this will all work when done, but I’m moving forward. Here it is with most of the hinges attached to the wall stringer. The lowest hinge is not attached, but you can’t see that. Three treads have been attached to the wall stringer and two to the moving stringer.
I’ll be doing the bottom step and the top step next, but this is proof of concept. Here it is in its mostly folded mode.
I didn’t have it exactly right, but it does go up further. I expect it to get easier as it gets less wobbly.