What's The Longest Length of Construction Standard Building Material or Lumber I Can Use To Cut a Single Stair Stringer?

Believe it or not, I had access to a lumberyard that could provide me with 30 foot lengths of lumber, even though I rarely use anything longer than 24 feet.

Before I continue, I would like to point out that every stairway is going to require a different answer, because I don't know exactly what type of stairway you're going to build or what it's going to be used for.

If you're concerned about the length of your building materials, then you should contact a structural engineer. Structural engineers can provide you with the building material sizes you're looking for, to build practically any stairway.

The longest stair stringer I ever cut was out of a 26 foot 3 x 12.

Your average two-story house with an 8 foot ceiling will usually require an 18 foot long stair stringer.

A stair stringer can realistically be cut out of the longest material you can find on the planet, even though it might need to be structurally supported by walls.

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