I meant to post this last week when I actually built it, but forgot to. I also forgot to take finished pictures with the newel caps in place, but use your imagination.
A couple of weeks ago one of the bosses told me that he forgot to call the stair guy to build railings at the new addition of a smallish job. By the time he remembered, the stair guys schedule was too far out to meet our deadline. The railings needed to mimick the existing railings of the San Francisco Victorian home. He asked me if it was something I thought that I could do. Stairs and railings are usually a specialty, and as such are usually subbed out. A sub genre of finish carpentry, if you will. I haven't actually built indoor railings before, but I knew it was something that I could accomplish.
There were no solid newel posts available in the size that I needed, so I built my own. As these will be painted, I used Poplar. It's a good, stable wood that doesn't have the most beautiful color or grain pattern, but is easy to mill and takes paint very well. The exception are the pickets, which are Alaskan Yellow Cedar. Kind of felt right using a wood from my home state. It's not soft like the usual Cedars, and has a very unique smell when cut.
I got to use a lot of tradesman tricks and practices, and a lot of the math that I told my teachers I'd never need. Yes, they we're right.
I did a lot of good preparation, so it wasn't just dumb luck, but it did fall together beautifully. The absence of a lower rail that the pickets sit on is a bit unique, but the existing rails pickets also connect directly to the stair treads. It actually works quite well at tying the newer, somewhat modern addition to the classic Victorian style. The caps not pictured are a pretty simple double cap design, with the bottom cap being 5/4 material, with a smaller top cap of 3/4.