I came across this post by @Sean61616. He said he made a set, but they weren’t functional, so I decided to give it a go and see if I could make one that was functional.
When you are building, you need to cut out a 2x4 section of the second floor for the upper railing to match up. There’s some animation issues I didn’t bother with trying to figure out how to keep your stonehearth citizens from walking though the railing because it is my understanding that stairs are going to be built into the game at some point, so this is something you can use until then.
As with anything I create, anyone is free to use the files to make their own, just note on this one you have to have a citizen place it down instead of the debug stamping tool.