Yes, I did.
Please note that I did not title this post “how to make a ladder”.
This was for my daughter’s play set in the back yard, which has had my 6-foot stepladder leaning against it for a few weeks now.
I started by leaning a 6-foot length of redwood against the play set to figure out what angle the ladder should lean at.
I used the table saw and the miter gauge to cut slots at 30-degrees to make the edges of a mortise; and then used a router to freehand cut the insides out (working carefully, the kirf of the table saw cut is enough of a buffer to rout this out freehand).
Since I’m not very good at measuring, the mortises were all too narrow, so I slapped together a little tenoning jig to trim the ends of the steps (this was easier than trying to cut all the mortises a little wider).
I successfully got all the steps installed on one rail of the ladder (glue and screws), and then realized that I was not going to be able to get all of the tenons to line up on the other rail. There were little imperfections in the wood and construction, and all together across all the steps this was enough to make it impossible to line everything up at once.
REALLY?!?! Not only am I supposed to wear “close-toed shoes” in the garage, but now I have to wear pants too?!
In any case, that last bit of adjusting with the router worked, and I finished the ladder… and then put on some pants and ate dinner.