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Title: Section 1003  •  Size: 13130

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SECTION 1003 - EXITS REQUIRED

1003.1 Number of Exits. Every building or usable portion thereof shall have at least one exit, not less than two exits where required by Table 10-A and additional exits as required by this section.

For purposes of this section, basements and occupied roofs shall be provided with exits as required for stories.

EXCEPTION: Occupied roofs on Group R, Division 3 Occupancies may have one exit if such occupied areas are less than 500 square feet (46.45 ) and are located no higher than immediately above the second story.

Floors complying with the provisions for mezzanines as specified in Section 507, Item 4, Exception 3, shall be provided with exits as specified therein.

Occupants on stories above the first and in basements shall have access to not less than two separate exits from the story or basement.

EXCEPTIONS: 1. Second stories having an occupant load less than 10 may be provided with only one exit.

2. Two or more dwelling units on the second story or in a basement may have access to only one common exit when the total occupant load served by that exit does not exceed 10.

3. Except as provided in Table 10-A, only one exit need be provided from the second floor or a basement within an individual dwelling unit or a Group R, Division 3 congregate residence.

4. When the third floor within an individual dwelling unit or a Group R, Division 3 congregate residence does not exceed 500 square feet (46.45 ), only one exit need be provided from that floor.

5. Floors and basements used exclusively for service of the building may have one exit. For the purposes of this exception, storage rooms, laundry rooms, maintenance offices and similar uses shall not be considered as providing service to the building.

6. Storage rooms, laundry rooms and maintenance offices not exceeding 300 square feet (27.87 ) in floor area may be provided with only one exit.

7. Elevator lobbies may have one exit provided the use of such exit does not require keys, tools, special knowledge or effort.

For special requirements see the following sections: Group A, Section 1016; Group E, Section 1017; Group H, Section 1018; Group I, Section 1019; Rooms Containing Fuel-fired Equipment and Cellulose Nitrate Handling Rooms, Section 1020; Reviewing Stands, Grandstands and Bleachers, Section 1021; Laboratories, Sections 304.2.2 and 305.2.4; and Open Parking Garages, Section 311.9.

Every story or portion thereof having an occupant load of 501 to 1,000 shall not have less than three exits.

Every story or portion thereof having an occupant load of 1,001 or more shall not have less than four exits.

The number of exits required from any story of a building shall be determined by using the occupant load of that story.

The maximum number of exits required for any story shall be maintained until egress is provided from the structure. (See Section 1010.)

1003.2 Width. The total width of exits in inches (mm) shall not be less than the total occupant load served by an exit multiplied by 0.3 (7.62) for stairways and 0.2 (5.08) for other exits nor less than specified elsewhere in this code. Such widths of exits shall be divided approximately equally among the separate exits.

The maximum exit width required from any story of a building shall be maintained.

1003.3 Arrangement of Exits. If only two exits are required, they shall be placed a distance apart equal to not less than one half of the length of the maximum overall diagonal dimension of the building or area to be served measured in a straight line between exits.

EXCEPTION: The separation between exit doors in the exit enclosures which are interconnected by a one-hour fire-resistive corridor conforming to the requirements of Section 1005 may be measured along a direct line of travel within the exit corridor. Enclosure walls shall not be less than 30 feet (9144 mm) apart at any point in a direct line of measurement.

Where three or more exits are required, at least two exits shall be placed a distance apart equal to not less than one half of the length of the maximum overall diagonal dimension of the building or area to be served measured in a straight line between the exits, and the additional exits shall be arranged a reasonable distance apart so that if one becomes blocked the others will be available.

1003.4 Travel Distance. The maximum travel distance shall not exceed 150 feet (45 720 mm), unless otherwise allowed by this section. The maximum travel distance may be increased in accordance with the following:

1. In a building equipped with an automatic sprinkler system throughout, the maximum travel distance may be 200 feet (60 960 mm).

2. The maximum travel distance of 150 feet (45 720 mm) and the maximum travel distance of 200 feet (60 960 mm) allowed by Item 1 may be increased up to an additional 100 feet (30 480 mm) when this increase in travel distance occurs in the last portion of the travel distance and is entirely within a one-hour fire-resistive corridor complying with Section 1005.

3. In one-story buildings classified as Group F, Division 2 or Group S, Division 2 Occupancies, and in one-story Group S, Division 5 Occupancy airplane hangars, the travel distance may be 400 feet (121.9 m) if the building is equipped with an automatic sprinkler system throughout and provided with smoke and heat ventilation as specified in Section 906.

4. In an open parking garage as defined in Section 311.9, the exit travel distance may be 300 feet (91 440 mm) in a building not equipped with an automatic sprinkler system throughout and may be increased to 400 feet (121.9 m) in a building equipped with an automatic sprinkler system throughout. Travel distances may be measured to open stairways which are permitted in accordance with Section 1009.1.

Special travel distance provisions are contained in other sections of this code as follows:

1. For atria, see Section 402.4.

2. For Group B office and Group R, Division 1 Occupancies, see Section 403.

3. For Group E Occupancies, see Section 1017.

4. For Group H Occupancies, see Section 1018.

5. For malls, see Section 404.4.3 and 404.4.5.

1003.5 Exits through Adjoining Rooms. Rooms may have one required exit that passes through an adjoining or intervening room which provides a direct, obvious and unobstructed means of travel to an exit corridor, exterior exit door, horizontal exit, exit passageway or enclosed stairway, provided the total travel distance does not exceed that permitted by other provisions of this code.

EXCEPTIONS: 1. Rooms within dwelling units may exit through more than one intervening room.

2. Rooms with a cumulative occupant load of 10 or less may exit through more than one intervening room.

In other than dwelling units, exits shall not pass through kitchens, store rooms, restrooms, closets or spaces used for similar purposes.

Foyers, lobbies and reception rooms constructed as required for corridors shall not be construed as intervening rooms.

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