I want to make a half wall beside a staircase (on the edge of the upper floor). One end will be attached to a concrete column, but the other will be (so far) unsuported. Something like the picture below:
[![enter image description here][1]][1]

What is the best way to ensure that It stays put and strong? If nothing else I will make a square tubing post (100x100mm, 1.5mm thick) from floor to ceiling and attach the drywall to it.

Any other ideas?


  [1]: https://i.sstatic.net/f6zlY.jpg