"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.

In this video of building a large staircase, I show you how I layout a stringer. It's simple math and if you use the right tools, it is quite easy. There are also some other tips and techniques I ...

It’s called a stair stringer. Calculate the area of the side of the stringer that is facing you. Look for repeated shapes in it. Rhys has 8 of these stringers.