Many thanks for the information. It looks like you made a lovely ladder. My application is a little different. At the top of the ladder, in your case 14.5 degrees, I want to go an end to end joint to a piece that would be vertical. This would be for handholds at the top of a loft ladder. I'm not sure how many tenons to use in a 1x4 or 1x6 piece and the size and depth to use? I expect the force of the extended handholds to be from the sides as people transfer onto and off of the ladder. Any thoughts?
Many thanks,
Phil