Exit signs shall be internally or externally illuminated. The face of an exit sign illuminated from an external source shall have an intensity of not less than 5 footcandles (54 lux). Internally illuminated signs shall provide equivalent luminance and be listed for the purpose.
Exception: Approved self-luminous signs that provide evenly illuminated letters shall have a minimum luminance of 0.06 foot-lamberts (0.21 cd/m2).
Where means of egress illumination is provided, the power supply for means of egress illumination shall normally be provided by the premises' electrical supply. In the event of power supply failure, illumination shall be automatically provided from an emergency system for the following occupancies where such occupancies require two or more means of egress:
- Group B buildings three or more stories in height, buildings with 100 or more occupants above or below a level of exit discharge serving the occupants or buildings with 1,000 or more total occupants.
- Group E in interior exit access and exit stairways and ramps, corridors, windowless areas with student occupancy, shops and laboratories.
- Group I.
Guards shall form a protective barrier not less than 42 inches (1067 mm) high.
Open guards shall have balusters or ornamental patterns such that a 6-inch-diameter (152 mm) sphere cannot pass through any opening up to a height of 34 inches (864 mm).
- At elevated walking surfaces for access to, and use of, electrical, mechanical or plumbing systems or equipment, guards shall have balusters or be of solid materials such that a sphere with a diameter of 21 inches (533 mm) cannot pass through any opening.
- In occupancies in Group I-3, F, H or S, the clear distance between intermediate rails measured at right angles to the rails shall not exceed 21 inches (533 mm).
- Approved existing open guards.
The minimum width of each door opening shall be sufficient for the occupant load thereof and shall provide a clear width of not less than 28 inches (711 mm). Where this section requires a minimum clear width of 28 inches (711 mm) and a door opening includes two door leaves without a mullion, one leaf shall provide a clear opening width of 28 inches (711 mm). In ambulatory care facilities, doors serving as means of egress from patient treatment rooms or patient sleeping rooms shall provide a clear width of not less than 32 inches (813 mm). In Group I-2, means of egress doors where used for the movement of beds shall provide a clear width not less than 411/2 inches (1054 mm). The maximum width of a swinging door leaf shall be 48 inches (1219 mm) nominal. The height of door openings shall be not less than 80 inches (2032 mm).
- The minimum and maximum width shall not apply to door openings that are not part of the required means of egress in occupancies in Groups R-2 and R-3.
- Door openings to storage closets less than 10 square feet (0.93 m2) in area shall not be limited by the minimum width.
- Width of door leafs in revolving doors that comply with Section 1010.1.1 shall not be limited.
- Door openings within a dwelling unit shall be not less than 78 inches (1981 mm) in height.
- Exterior door openings in dwelling units, other than the required exit door, shall be not less than 76 inches (1930 mm) in height.
- Exit access doors serving a room not larger than 70 square feet (6.5 m2) shall be not less than 24 inches (610 mm) in door width.
- Door closers and door stops shall be permitted to be 78 inches (1980 mm) minimum above the floor.
Revolving doors shall comply with the following:
- A revolving door shall not be located within 10 feet (3048 mm) of the foot or top of stairways or escalators. A dispersal area shall be provided between the stairways or escalators and the revolving doors.
- The revolutions per minute for a revolving door shall not exceed those shown in Table 1104.9.
- A revolving door is permitted to be used without an adjacent swinging door for street-floor elevator lobbies provided a stairway, escalator or door from other parts of the building does not discharge through the lobby and the lobby does not have any occupancy or use other than as a means of travel between elevators and a street.
- Existing revolving doors where the number of revolving doors does not exceed the number of swinging doors within 20 feet (6096 mm).
REVOLVING DOOR SPEEDS
|INSIDE DIAMETER (feet-inches)||POWER-DRIVEN-TYPE SPEED CONTROL (rpm)||MANUAL-TYPE SPEED CONTROL (rpm)|
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
- Revolving doors shall not be given credit for more than 50 percent of the required egress capacity.
- Each revolving door shall be credited with not more than a 50-person capacity.
- Revolving doors shall be capable of being collapsed when a force of not more than 130 pounds (578 N) is applied within 3 inches (76 mm) of the outer edge of a wing.
Exception: For fire escape stairways serving 10 or fewer occupants, an approved fire escape ladder is allowed to serve as the termination.