I also picked up some pressure treated 2x4s.
This is not ADA compliant, but it does work and it's not dangerous.
There are 2 2x4s stacked on top of each other at the stair.
I had to use my flush cut saw to cut the top 2x4 at the correct angle. The 3 2x4s that run laterally sit inside the slots that I cut.
Then Nancy wanted it to be coated. I had 1/2 can of Gaco deck coating laying around (think of really thick waterproof paint.) So we decided to use it all. Nancy wanted a non-slip surface, so we dumped in a cup of sand while stirring it. The results look pretty good and it is not slick at all.