How do I install a handrail like this?

here's basic idea be patient & get thru the first part of video gives you basics https://www.youtube.com/watch?v=ysBBaHgKVQQ

Check these out and see if any are what you are looking for:

https://www.pinterest.com/pin/422775483762907699/?lp=true

Yes. Keep in mind that code in different areas require different things. Mine requires that the handrail be graspable and be a certain distance from the wall.

There are special brackets available to hang the railing. Check out your local hardware store for the different types.

I would screw wooden blocks into the studs and then screw the handrail to them.

I THINK 2BY 4 WOULD BE TOO THICK ,1BY 4 BETTER .Brackets good if you can find them .

In addition to Naomie and Nancy's excellent advice, new codes require the handrail be positioned a specific height above stair treads. Call your code office in advance.

BUY A REAL HANDRAIL.............I did and they had special brackets to anchor it with...........just make sure they place it near the top and also anchor to STUDS............. Had 5 kiddos and several grands and no one ever pull it loose or damaged it in anyway.........the board show is NOT good to use....................

I bought my handrail at Lowes..............was less that $100, but then also bought the special brackets (3) to mount it...............

You can use a 1x4, or 1x6, with the brackets screwed to the studs. Check your local building codes for placement, height, etc.

We had one like this for your years because we couldn't afford a traditional curved ballister. Hated it. It's not as comfortable in your hand so if you really need it to help you climb, not so great.