How to Calculate the Dimensions of Stair Stringers. Five steps to crunch the numbers for stairs. We promise they’re fairly simple. By Roy Berendsohn Published: Jul 08, 2022 6:49 PM EDT.

"You can absolutely cut a stair stringer if only you only knew the way the math works," my dad once said to me. So, long before I ever had a geometry class, I knew the math behind determining a slope.

There are three main components in a typical staircase: stringers, treads and risers. Stringers, normally cut from 2x12s, are the angled boards that extend from the deck down to the ground.

But it'll only be solid if the stringers are solid. That's the challenging part. How to build stair railing. First, build a ...

Some old-fashioned lumberyards may even make custom-cut stair stringers for you if you provide the relevant measurements. Then you assemble the parts at your home. [ More Builder: How to repair ...

I never cut notches in my wood stair stringers. I created 1/2-inch-deep mortises in my 2x12s to preserve the strength of the stringers. These mortises take much more time to create, which is why ...