Design: Stair dimensions

Schematic of stair dimensions and terminology

Research has shown that the physical dimensions of stairs play a significant role in stair accidents.

Consistency of stair dimensions is very important. Even small differences in the rise or going between adjacent steps can cause someone to misstep which can lead to a fall.

Dimensions and standards for stairs can be found in the British Standards and section K of the building regulations. As this document is not retrospective many existing buildings may not conform to current regulations. To reduce the risk of accidents you should attempt to bring older stairs up to current standards, when the opportunity presents itself.
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