I'm not a math whiz or a full-time custom stair builder, but I still like to tackle the occasional curved staircase. I enjoy the challenge of figuring out how to build it, and I like the distinctive look that custom stairs give my custom homes.

As with straight staircases, all you really need to know to build curved stairs is the rise and run. But a curved stair has two runs: The inside stringer has a tighter radius and thus a shorter run, while the outside stringer has a larger radius and a longer run.

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