1010.1.5 Floor elevation.
BC § 1010.1.5
There shall be a floor or landing on each side of a door. Such floor or landing shall be at the same elevation on each side of the door. Landings shall be level except for exterior landings, which are permitted to have a slope not to exceed 0.25 unit vertical in 12 units horizontal (2-percent slope). Exceptions: 1. Doors serving individual dwelling units in Groups R-2 and R-3 where the following apply: 1.1. A door is permitted to open at the top step of an interior flight of stairs within the dwelling unit, provided the door does not swing over the top step. 1.2. Screen doors and storm doors are permitted to swing over stairs or landings.
2.Exterior doors as provided for in Section 1003.5, Exception 1, and Section 1022.2, which are not on an accessible route.
3.In Group R-3 occupancies not required to be Accessible units, Type B+NYC units or Type B units, the landing at an exterior doorway shall be not more than 7 3/4 inches (186.9 mm*) below the top of the threshold, provided the door, other than an exterior storm or screen door, does not swing over the landing. * Editor's note: As set forth in L.L. 2021/126; correct conversion should be 196.9 mm.
4.Variations in elevation due to differences in finish materials, but not more than 1/2 inch (12.7 mm).
5.Exterior spaces of Type B+NYC units and Type B units where permitted pursuant to the exception to Section 1107.4.
6.Doors serving equipment spaces not required to be accessible in accordance with Section 1103.2.9 and serving an occupant load of five or less shall be permitted to have a landing on one side to be not more than 7 inches (177.8 mm) above or below the landing on the egress side of the door.
