14B-10-1020  Corridors.
The provisions of Section 1020 of IBC are adopted by reference with the following modifications:
1.   Delete exception 1 to Section 1020.1.
2.   Replace Table 1020.1 as shown:
TABLE 1020.1
CORRIDOR FIRE-RESISTANCE RATING
OCCUPANCY
OCCUPANT LOAD SERVED BY CORRIDOR
REQUIRED FIRE-RESISTANCE RATING (hours)
Without sprinkler system
With sprinkler system
OCCUPANCY
OCCUPANT LOAD SERVED BY CORRIDOR
REQUIRED FIRE-RESISTANCE RATING (hours)
Without sprinkler system
With sprinkler system
H-1, H-2, H-3
All
Not Permitted
1
H-4, H-5
Greater than 30
Not Permitted
1
A, B, F, M, S, U
Greater than 30
1
0 e
E
All
1
1
R
Greater than 10
1
1
I-2 a
All
Not Permitted
0
I-1, I-3
All
Not Permitted
1 b
I-4
All
1
0
 
a.   For requirements for occupancies in Group I-2, see Sections 407.2 and 407.3.
b.   For a reduction in the fire-resistance rating for occupancies in Group I-3, see Section 408.8.
c.   [Reserved.]
d.   [Reserved.]
e.   In Groups A-1, A-2, A-3, and A-4, corridors serving spaces with an occupant load of 300 or more shall have a fire-resistance rating of not less than 1 hour.
2.1.   Revise Section 1020.1.1 by replacing "Section 3006.2.1" with "Section 3002.1.1."
3.   Replace Table 1020.2 as shown:
TABLE 1020.2
MINIMUM CORRIDOR WIDTH
OCCUPANCY
MINIMUM WIDTH
(inches)
OCCUPANCY
MINIMUM WIDTH
(inches)
Any facility not listed in this table
44
Access to and utilization of mechanical, plumbing or electrical systems or equipment
24
With an occupant load of less than 50
36
Within or serving a single dwelling unit
36
In Group E-1 corridors serving classrooms, study rooms or assembly rooms
60 a
In corridors and areas serving stretcher traffic in ambulatory care facilities
72
Group I-2 in areas where required for bed movement
96
 
For SI: 1 inch = 25.4 mm.
a.   When lockers are installed in corridors, the full required clear width of the corridor shall be provided between locker doors when open.
4.   Revise exception 2 to Section 1020.4 to read:
“2.   In occupancies in Groups B, E-2, F, I-1, M, R, S and U, where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1, the length of the dead-end corridors shall not exceed 50 feet (15 240 mm).”
5.   Revise exception 1 to Section 1020.5 by deleting “smoking lounges.”
6.   Add new exception 5 to Section 1020.5 to read:
“5.   Use of a corridor as a source of makeup air for exhaust systems in Group R-2 dwelling units and sleeping units that open directly onto such corridors shall be permitted, provided that each such corridor is directly supplied with outdoor air at a rate greater than the rate of makeup air taken from the corridor and the dwelling units and sleeping units are provided with an independent source of air for ventilation.”
7.   Delete item 5 in Section 1020.5.1.
8.   Add a new Section 1020.7 to read:
"1020.7 Toilet rooms.
Separation shall not be required between a toilet room and a fire-resistance-rated corridor where the toilet room meets the following criteria:
1.   The toilet room shall be separated from the remainder of the building by fire-resistance-rated construction meeting the requirements of Section 1020.1.
2.   The toilet room shall not directly connect to any habitable space.
3.   The toilet room shall not contain any fuel-fired equipment or appliances."
(Amend Coun. J. 2-19-20, p. 14473, Art. II, § 49; Amend Coun. J. 10-7-20, p. 21791, Art. II, § 24)