14B-10-1006 Number of exits and exit access doorways.

The provisions of Section 1006 of IBC are adopted by reference with the following modifications:

1.   Revise Section 1006.1 by replacing "occupied roofs" with "occupiable rooftops."

2.   Revise Section 1006.2 by deleting "or basement."

3.   Revise Section 1006.2.1 by replacing "values listed in Table 1006.2.1" with "values listed in Table 1006.2.1 or the floor area of the space exceeds 4,000 square feet (372 m2)."

4.   Replace Table 1006.2.1 as shown:

TABLE 1006.2.1
SPACES WITH ONE EXIT OR EXIT ACCESS DOORWAY

OCCUPANCY	MAXIMUM OCCUPANT LOAD OF SPACE	MAXIMUM COMMON PATH OF EGRESS TRAVEL DISTANCE (feet)
		Without Sprinkler System (feet)	With Sprinkler System (feet)
A c, E	49	75	75 a
B, M	49	75	115 a
F	49	75	115 a
H-1, H-2, H-3	3	NP	25 b
H-4, H-5	10	NP	75 b
I-1, I-2 d, I-4	10	NP	75 a
I-3	10	NP	100 a
R-1	10 h	60	75 i	115 a
R-2	10 h	60	75 i	115 a
R-3 e, R-5 e	10 h	60	75 g, i	115 a
R-4 e	10 h	60	75 g, i	115 a
S f	29	75	115 a
U	49	75	75 a

 

For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m 2.

NP = Not permitted.

a.   Buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1.

b.   Group H occupancies equipped throughout with an automatic sprinkler system in accordance with Section 903.2.5.

c.   For a room or space used for assembly purposes having fixed seating, see Section 1029.8.

d.   For the travel distance limitations in Group I-2, see Section 407.4.

e.   The common path of egress travel distance and occupant load limitations shall not apply to a building exclusively containing a single dwelling unit and no other occupancy or within a townhouse.

f.   The common path of egress travel distance in a Group S-2 parking garage shall be not more than 100 feet.

g.   For the travel distance limitations in Groups R-3, R-4 and R-5 equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.3, see Section 1006.2.2.6.

h.   20 in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1. For spaces in Group R occupancies required by Section 1004 to use an occupant load factor more intensive that 125 gross, the maximum occupant load is 49.

i.   Buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.2. See Section 903 for occupancies where automatic sprinkler systems are permitted in accordance with Section 903.3.1.2.

5.   [Reserved.]

6.   Revise Section 1006.2.2.1 by replacing "one is permitted to be a fixed ladder" with "one is allowed to be served by a fixed ladder" and replacing "equal to one-half" with "equal to not less than one-half."

6.1.   Revise Section 1006.2.2.2 by replacing "equal to one-half" with "equal to not less than one-half."

7.   Revise Section 1006.2.2.3 by deleting "approved."

8.   Revise Section 1006.2.2.4 by replacing "2 1/2 years of age or less" with "less than 2 years of age."

9.   Revise Section 1006.2.2.6 to read:

"1006.2.2.6 Groups R-3, R-4 and R-5.

Where Group R-3 and R-5 occupancies are permitted by Section 903.2.8 to be protected by an automatic sprinkler system installed in accordance with Section 903.3.1.3, the exit access travel distance for Group R-3 and R-5 shall be not more than 75 feet (22 860 mm). Where Group R-4 occupancies are permitted by Section 903.2.8 to be protected by an automatic sprinkler system installed in accordance with Section 903.3.1.3, the exit access travel distance for Group R-4 shall be not more than 75 feet (22 860 mm)."

10.   Add a new Section 1006.2.2.7 to read:

"1006.2.2.7 Electrical rooms.

Two exit access doorways are required in electrical rooms containing equipment rated 3,000 amperes or greater. Exit access doorways shall be separated by a horizontal distance equal to not less than one-half the length of the maximum overall diagonal dimension of the room."

11.   Revise Section 1006.3 to read:

"1006.3 Egress from stories or occupiable rooftops.

The means of egress system serving any story or occupiable rooftop shall be provided with the number of separate and distinct exits or access to exits based on the aggregate occupant load served in accordance with this section. Where stairways serve more than one story or occupiable rooftop, only the occupant load of each story or occupiable rooftop considered individually shall be used in calculating the required number of exits or access to exits serving that story or occupiable rooftop."

12.   Revise exception 1 to Section 1006.3.1 by replacing "Group R-1, R-2 or R-2" with "Group R."

13.   Delete exception 2 to Section 1006.3.1.

14.   Revise Section 1006.3.2 to read:

"1006.3.2 Egress based on occupant load.

Each story and occupiable rooftop shall have the minimum number of separate and distinct exits, or access to exits, as specified in Table 1006.3.2. A single exit or access to a single exit shall be permitted in accordance with Section 1006.3.3. The required number of exits, or exit access stairways or ramps providing access to exits, from any story or occupiable rooftop shall be maintained until arrival at the exit discharge or a public way.

Exception: Two exits shall be permitted from a story separated by fire barriers into two areas of approximately equal size that are connected by a horizontal exit where the occupant load of each area does not exceed 300."

15.   Revise Section 1006.3.3 to read:

"1006.3.3 Single exits.

A single exit or access to a single exit shall be permitted from any story or occupiable rooftop where one of the following conditions exists:

1.   The occupant load, number of dwelling units and common path of egress travel distance do not exceed the values in Table 1006.3.3(1).

2.   Rooms, areas and spaces in the first story above grade plane complying with Section 1006.2 with exits that discharge directly to the exterior at the level of exit discharge, are permitted to have one exit.

3.   [Reserved.]

4.   [Reserved.]

5.   [Reserved.]

6.   A level within or serving a single dwelling unit, provided all the following criteria are met:

6.1.   The level is either:

6.1.1.   A story not more than one story above or below the first story above grade plane.

6.1.2.   A mezzanine in accordance with Section 505.2.

6.1.3.   A loft in accordance with Section 1207.5.

6.2.   The floor area of the level does not exceed:

6.2.1.   1,600 square feet (148.6 m2).

6.2.2.   2,000 square feet (185.8 m2) where the building is protected throughout with an automatic sprinkler system.

6.3.   The dwelling unit has an exit door that discharges directly to the exterior at the level of exit discharge.

7.   The third story above grade plane within a dwelling unit provided all the following criteria are met:

7.1.   The building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1, 903.3.1.2 or 903.3.1.3.

7.2.   The floor area of the story does not exceed 1,600 square feet (148.6 m2).

7.3.   The dwelling unit has an exit that discharges directly to the exterior at the level of exit discharge.

8.   The third story above grade plane within a dwelling unit provided that all of the following criteria are met:

8.1.   The building does not contain more than three stories above grade plane.

8.2.   The building does not contain more than three dwelling units.

8.3.   The net floor area of the story does not exceed 800 square feet (74.3 m2).

8.4.   Each habitable space on the story shall have a window with a minimum net clear opening of 5.7 square feet (0.53 m2), the bottom of which is not more than 44 inches (1118 mm) above the floor.

8.5.   Each room within the dwelling unit used for sleeping purposes shall be provided with solid wood doors not less than 1 3/4 inches (45 mm) in thickness in a rabbeted frame, or doors in compliance with Section 716.2.2.1 with a fire protection rating of not less than 20 minutes.

8.6.   In addition to an interior exit access stairway, the second story above grade plane shall have either a second interior exit access stairway leading directly to an exit door that discharges to the exterior at the level of exit discharge or access to an exterior means of egress leading directly to grade.

8.7.   Either of the following shall be provided at the third story above grade plane:

8.7.1.   The exit access stairway is enclosed with construction providing a fire-resistance rating of at least one hour and a door meeting criterion 8.5.

8.7.2.   An exterior balcony is provided with a depth of at least 3 feet (914 mm).

9.   The third and fourth story above grade plane in a townhouse, provided all the following criteria are met:

9.1.   The townhouse construction type is I, IIA, IIIA or IV.

9.2.   The floor area of the story does not exceed 1,500 square feet (139.4 m2).

9.3.   At least one exit access stairway is contained within the townhouse and leads directly to the exterior at the level of exit discharge.

9.4.   An egress balcony complying with Section 1021 shall connect at least 3 townhouses at the highest story to an interior exit stairway.

9.5.   Each habitable space more than two stories above grade plane shall have a window with a minimum net clear opening of 5.7 square feet (0.53 m2), the bottom of which is not more than 44 inches (1118 mm) above the floor.

9.6.   Each room in the townhouse used for sleeping purposes shall be provided with solid wood doors not less than 1-3/4 inches (45 mm) in thickness in a rabbeted frame, or doors in compliance with Section 716.2.2.1 with a fire protection rating of not less than 20 minutes.

10.   An occupiable rooftop provided all the following criteria are met:

10.1.   The occupiable rooftop is adjacent to a public way.

10.2.   The occupiable rooftop is located no more than 12 feet (3658 mm) above the level of the public way.

10.3.   The net floor area does not exceed 800 square feet (74.3 m2).

11.   An occupiable rooftop provided both of the following criteria are met:

11.1.   The occupiable rooftop is located no more than 40 feet (12.2 m) above grade plane.

11.2.   The net floor area does not exceed 300 square feet (27.9 m2).

12.   A basement with a floor area that does not exceed 2,000 square feet (185.8 m2) that is used exclusively for storage or mechanical equipment, with only incidental human occupancy.

13.   An outdoor area as provided in the exceptions to Section 1004.7."

16.   Replace Table 1006.3.3(1) as shown:

TABLE 1006.3.3(1)
STORIES WITH ONE EXIT OR ACCESS TO ONE EXIT FOR R-2, R-3, R-4 AND R-5 OCCUPANCIES

 

STORY	OCCUPANCY	MAXIMUM NUMBER OF DWELLING UNITS PER STORY	MAXIMUM COMMON PATH OF EGRESS TRAVEL DISTANCE
First story below grade plane; first or second story above grade plane	R-2, R-3, R-4, R-5	4 dwelling units	75 feet a
Third story above grade plane and higher	NP	NA	NA

 

For SI: 1 foot = 3048 mm.

NP   =   Not permitted.

NA   =   Not applicable.

a.   The maximum common path of egress travel distance shall be 125 feet (38.1 m) in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2 and buildings of Group R-3, R-4 or R-5 occupancy equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.3.

17.   Delete Table 1006.3.3(2).

18.   Delete Section 1006.3.3.1.

(Amend Coun. J. 7-24-19, p. 3646, § 31; Amend Coun. J. 2-19-20, p. 14473, Art. II, § 42; Amend Coun. J. 10-7-20, p. 21791, Art. II, § 22; Amend Coun. J. 6-25-21, p. 32180, Art. II, § 17; Amend Coun. J. 9-14-21, p. 35949, Art. XV, § 8; Amend Coun. J. 1-26-22, p. 43756, Art. II, § 8)