Tread Width — Historical Term — Underfoot element
Category: Underfoot element
Obsolete term for tread dimensions; superseded by separate going and tread length per DIN 18065.
Tread width is an outdated term that was ambiguous: it was used both for the depth of an individual step and for the overall width of the stair flight. Today, the term 'going' should be used for the step depth, and 'stair width' for the clear width of the flight.
Related terms
Related terms: Tread Depth (Going), Stair Width, Usable Stair Width, Tread Dimensions — Going and Length, Walking Line, Tread Flaring — Overview for Curved Stairs.