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The minimum width of stairways is 36. Handrails may project into the required width a distance of 3 Â½ from each side of a stairway. Stringers and other projects such as trim and similar decorative features may project into the required width 1 Â½ on each side.
As this paper is being prepareda third context, for the 1400 mm (56 in.) nominal minimum width, is being adopted forNFPA model codes and standards for new exit stairs used by more than 2,000 personsper stair.