Every number here is a working estimate to check with your building authority. Whoever prints this page takes responsibility for what is in it.
Lessons / Stairs, landings and handrails
Guess first
How wide a stair must be
Show a hint
A stair 30 in wide.
Every number here is a working estimate. Check it with your building authority.Turn JavaScript on to work the lesson. The drawing shows how it starts.
The rule this lesson teaches
A flight is at least 860 mm (34 in) wide, and wider than 1.1 m (43 5/16 in) it needs a handrail on both sides.