1 x 6 and 2 x 4 Wood Handrail
If you're looking for a way to build a hand rail and not spend a lot of money, there is a good chance that you're looking at it in the picture above. Using 2 x 4, 1 x 6 and 1 x 4, you can build a safe handrail. I'm not about to suggest that the handrail in the picture above is what I would consider to be a safe handrail, but it can be done.