Exception: Door closers and stops shall not reduce headroom to less than 78 inches (1981 mm).
Exception: Where approved by the building official, the actual number of occupants for whom each occupied space, floor or building is designed, although less than those determined by calculation, shall be permitted to be used in the determination of the design occupant load.
MAXIMUM FLOOR AREA ALLOWANCES PER OCCUPANT
|FUNCTION OF SPACE||OCCUPANT LOAD FACTORa|
|Accessory storage areas, mechanical equipment room||300 gross|
|Agricultural building||300 gross|
|Aircraft hangars||500 gross|
Gaming floors (keno, slots, etc.)
Exhibit Gallery and Museum
|Assembly with fixed seats||See Section1004.4|
|Assembly without fixed seats|
Concentrated (chairs only-not fixed)
Unconcentrated (tables and chairs)
|Bowling centers, allow 5 persons for each lane including 15 feet of runway, and for additional areas||7 net|
|Business areas||100 gross|
|Courtrooms—other than fixed seating areas||40 net|
|Day care||35 net|
Shops and other vocational room
|Exercise rooms||50 gross|
|Group H-5 Fabrication and manufacturing areas||200 gross|
|Industrial areas||100 gross|
Inpatient treatment areas
|Kitchens, commercial||200 gross|
|Locker rooms||50 gross|
|Mall buildings—covered and open||See Section 402.8.2|
Areas on other floors
Basement and grade floor areas
Storage, stock, shipping areas
|Parking garages||200 gross|
|Skating rinks, swimming pools|
Rink and pool
|Stages and platforms||15 net|
The occupant load of wheelchair spaces and the associated companion seat shall be based on one occupant for each wheelchair space and one occupant for the associated companion seat provided in accordance with Section 1108.2.3.
The occupant load of seating booths shall be based on one person for each 24 inches (610 mm) of booth seat length measured at the backrest of the seating booth.
Exception: For other than Group H and I-2 occupancies, the capacity, in inches (mm), of means of egress stairways shall be calculated by multiplying the occupant load served by such stairway by a means of egress capacity factor of 0.2 inch (5.1 mm) per occupant in buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 and an emergency voice/alarm communication system in accordance with Section 907.5.2.2.
Exception: For other than Group H and I-2 occupancies, the capacity, in inches (mm), of means of egress components other than stairways shall be calculated by multiplying the occupant load served by such component by a means of egress capacity factor of 0.15 inch (3.8 mm) per occupant in buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2 and an emergency voice/alarm communication system in accordance with Section 907.5.2.2.
In the event of power supply failure, an emergency electrical system shall automatically illuminate all of the following areas:
Exception: The clear width of 48 inches (1219 mm) between handrails is not required at stairways serving buildings equipped throughout with an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2.
Signage shall comply with the ICC A117.1 requirements for visual characters and include the International Symbol of Accessibility. Where exit sign illumination is required by Section 1011.3, the signs shall be illuminated. Additionally, raised character and Braille signage complying with ICC A117.1 shall be located at each door to an area of refuge and exterior area for assisted rescue in accordance with Section 1011.4.
Means of egress doors shall be readily distinguishable from the adjacent construction and finishes such that the doors are easily recognizable as doors. Mirrors or similar reflecting materials shall not be used on means of egress doors. Means of egress doors shall not be concealed by curtains, drapes, decorations or similar materials.
Exception: Door closers and door stops shall be permitted to be 78 inches (1980 mm) minimum above the floor.
REVOLVING DOOR SPEEDS
|INSIDE DIAMETER |
|MANUAL-TYPE SPEED |
Exception: A collapsing force in excess of 180 pounds (801 N) is permitted if the collapsing force is reduced to not more than 130 pounds (578 N) when at least one of the following conditions is satisfied:
Exception: Access doors or gates in barrier walls and fences protecting pools, spas and hot tubs shall be permitted to have operable parts of the release of latch on self-latching devices at 54 inches (1370 mm) maximum above the finished floor or ground, provided the self-latching devices are not also self-locking devices operated by means of a key, electronic opener or integral combination lock.
Exception: Items 1 through 4 shall not apply to doors to areas where persons, which because of clinical needs, require restraint or containment as part of the function of a psychiatric treatment area.
Exception: Where approved, a delay of not more than 30 seconds is permitted.
Where located as part of an accessible route, turnstiles shall have at least 36 inches (914 mm) clear at and below a height of 34 inches (864 mm), at least 32 inches (813 mm) clear width between 34 inches (864 mm) and 80 inches (2032 mm) and shall consist of a mechanism other than a revolving device.
Exception: Spaces under stairways serving and contained within a single residential dwelling unit in Group R-2 or R-3 shall be permitted to be protected on the enclosed side with 1/2-inch (12.7 mm) gypsum board.
A spiral stairway shall have a 71/2-inch (191 mm) minimum clear tread depth at a point 12 inches (305 mm) from the narrow edge. The risers shall be sufficient to provide a headroom of 78 inches (1981 mm) minimum, but riser height shall not be more than 91/2 inches (241 mm). The minimum stairway clear width at and below the handrail shall be 26 inches (660 mm).
Exception: Alternating tread devices used as an element of a means of egress in buildings from a mezzanine area not more than 250 square feet (23 m2) in area which serves not more than five occupants shall have a minimum tread depth of 3 inches (76 mm) with a minimum projected tread depth of 101/2 inches (267 mm). The rise to the next alternating tread surface shall not exceed 8 inches (203 mm).
Ship ladders shall have a minimum tread depth of 5 inches (127 mm). The tread shall be projected such that the total of the tread depth plus the nosing projection is no less than 81/2 inches (216 mm). The maximum riser height shall be 91/2 inches (241 mm).
Exception: In buildings without an occupied roof, access to the roof shall be permitted to be a roof hatch or trap door not less than 16 square feet (1.5 m2) in area and having a minimum dimension of 2 feet (610 mm).
Exception: In Group R-2 and R-3 individual dwelling or sleeping units that are not required to be Accessible units, Type A units or Type B units in accordance with Section 1107, landings are permitted to be 36 inches by 36 inches (914 mm by 914 mm) minimum.
The bottom of the sign shall be not less than 10 inches (254 mm) nor more than 12 inches (305 mm) above the floor level. The sign shall be flush mounted to the door or wall. Where mounted on the wall, the edge of the sign shall be within 4 inches (102 mm) of the door frame on the latch side.
Exception: Approved exit sign illumination means that provide continuous illumination independent of external power sources for a duration of not less than 90 minutes, in case of primary power loss, are not required to be connected to an emergency electrical system.
Exception: Means of egress are not prohibited through adjoining or intervening rooms or spaces in a Group H, S or F occupancy when the adjoining or intervening rooms or spaces are the same or a lesser hazard occupancy group.
Exception: The means of egress from a smaller tenant space shall not be prohibited from passing through a larger adjoining tenant space where such rooms or spaces of the smaller tenant occupy less than 10 percent of the area of the larger tenant space through which they pass; are the same or similar occupancy group; a discernable path of egress travel to an exit is provided; and the means of egress into the adjoining space is not subject to locking from the egress side. A required means of egress serving the larger tenant space shall not pass through the smaller tenant space or spaces.Relocated
COMMON PATH OF EGRESS TRAVEL
|OCCUPANCY||WITHOUT SPRINKLER SYSTEM |
|WITH SPRINKLER |
|≤ 30||> 30|
|H-1, H-2, H-3||Not Permitted||Not Permitted||25a|
|All others c, f||75||75||75a, b|
Where a building contains mixed occupancies, each individual occupancy shall comply with the applicable requirements for that occupancy. Where applicable, cumulative occupant loads from adjacent occupancies shall be considered in accordance with the provisions of Section 1004.1.
Travel distance shall be determined as specified in Section 1016.1, but all portions of a refrigerated room or space shall be within 150 feet (45 720 mm) of an exit or exit access doorway where such rooms are not protected by an approved automatic sprinkler system. Egress is allowed through adjoining refrigerated rooms or spaces.
EXIT ACCESS TRAVEL DISTANCEa
|OCCUPANCY||WITHOUT SPRINKLER |
|WITH SPRINKLER |
|A, E, F-1, M, R, S-1||200||250b|
|F-2, S-2, U||300||400c|
|I-2, I-3, I-4||Not Permitted||200c|
CORRIDOR FIRE-RESISTANCE RATING
|REQUIRED FIRE-RESISTANCE |
|With sprinkler |
|H-1, H-2, H-3||All||Not Permitted||1|
|H-4, H-5||Greater than 30||Not Permitted||1|
|A, B, E, F, M, S, U||Greater than 30||1||0|
|R||Greater than 10||Not Permitted||0.5|
|I-2a, I-4||All||Not Permitted||0|
|I-1, I-3||All||Not Permitted||1b|
MINIMUM CORRIDOR WIDTH
|Any facilities not listed below||44 inches|
|Access to and utilization of mechanical,|
plumbing or electrical systems or equipment
|With a required occupancy capacity less than 50||36 inches|
|Within a dwelling unit||36 inches|
|In Group E with a corridor having a required|
capacity of 100 or more
|In corridors and areas serving gurney traffic|
in occupancies where patients receive outpatient
medical care, which causes the patient to be
incapable of self-preservation
|Group I-2 in areas where required for bed|
|STORY||OCCUPANCY||MAXIMUM NUMBER OF DWELLING |
|MAXIMUM EXIT ACCESS TRAVEL |
|Basement, first, second or third story||R-2a, b||4 dwelling units||125 feet|
|Fourth story and above||NP||NA||NA|
|STORY||OCCUPANCY||MAXIMUM OCCUPANTS PER STORY||MAXIMUM EXIT ACCESS TRAVEL |
|First story or basement||A, Bb, E, Fb, M, U, Sb||49 occupants||75 feet|
|H-2, H-3||3 occupants||25 feet|
|H-4, H-5, I, R-1, |
|10 occupants||75 feet|
|S||29 occupants||100 feet|
|Second story||B, F, M, S||29 occupants||75 feet|
|Third story and above||NP||NA||NA|
Exception: Landing platforms or roof areas for helistops that are less than 60 feet (18 288 mm) long, or less than 2,000 square feet (186 m2) in area, shall be permitted to access the second exit by a fire escape, alternating tread device or ladder leading to the story or level below.
Openings in interior exit stairways and ramps other than unprotected exterior openings shall be limited to those necessary for exit access to the enclosure from normally occupied spaces and for egress from the enclosure.
In each case, openings into the fire-resistance-rated construction shall be limited to those needed for maintenance and operation and shall be protected by opening protectives in accordance with Section 716 for shaft enclosures.