IFC section 1018 and all subsections are deleted in their
entirety and replaced with the following:
SECTION 1018
AISLES
1018.1
Aisles and aisle
accessways. Aisles and aisle accessways serving as a portion of the exit
access in the means of egress system shall comply with the requirements of this
section. Aisles and aisle accessways shall be provided from all occupied
portions of the exit access. Aisles and aisle accessways serving assembly
areas, other than seating at tables, shall comply with Section 1029. Aisles and
aisle accessways serving reviewing stands, grandstands, and bleachers shall
comply with Section 1029.
1018.2
Width determination. Where tables or counters are served by fixed
seats, the width of the aisle or aisle accessway shall be measured from the
back of the seat. Where seating is located at a table or counter and is
adjacent to an aisle or aisle accessway, the measurement of required clear
width of the aisle or aisle accessway shall be made to a line 19 inches (483
mm) away from and parallel to the edge of the table or counter. The 19-inch
(483 mm) distance shall be measured perpendicular to the side of the table or
counter. In the case of other side boundaries for aisle or aisle accessways,
the clear width shall be measured to walls, tread edges, or other obstructions.
The required width of aisles and aisle accessways shall be unobstructed.
Exception: Doors, when fully opened, and handrails
shall not reduce the required width by more than 7 inches (178 mm). Doors in
any position shall not reduce the required width by more than one-half. Other
nonstructural projections, such as trim and similar decorative features are
permitted to project into the required width 1.5 inches (38 mm) from each
side.
1018.2.1
Minimum aisle
accessway width. Aisle accessways not required to be accessible by the
Minnesota Accessibility Code, Minnesota Rules, chapter 1341, shall provide a
minimum 12 inches (305 mm) of width, plus 0.5 inch (12.7 mm) of width for each
additional 1 foot (305 mm), or fraction thereof, beyond 12 feet (3, 658 mm) of
aisle accessway length.
Exception: Portions of an aisle accessway having a
length not exceeding 6 feet and used by a total of not more than four
persons.
1018.2.2
Minimum aisle width. The minimum clear width shall be determined
by Section 1005.1 for the occupant load served, but shall not be less than 36
inches (914 mm).
Exception: Nonpublic aisles serving fewer than 50
people, and that are not required to be accessible by the Minnesota
Accessibility Code, Minnesota Rules, chapter 1341, need not exceed 28 inches
(711 mm) in width.
1018.3
Length.
1018.3.1
Aisle accessway. The
length of travel along the aisle accessway shall not exceed 30 feet ( 9,144 mm)
to an aisle or exit access doorway.
1018.3.2
Aisle. The length of
travel along an aisle or combination aisle accessway and aisle to a point where
a person has a choice of two or more paths of egress travel to separate exits
or exit access doorways shall not exceed that permitted by Section 1006.2.1 for
common path of egress travel.
Subpart
1.
IFC Table 1018.1.
IFC Table 1018.1 is amended as follows:
TABLE 1018.1
CORRIDOR FIRE-RESISTANCE RATING
|
|
|
REQUIRED FIRE-RESISTANCE
RATING(hours) |
| OCCUPANCY |
OCCUPANT LOAD SERVED BY CORRIDOR |
Without sprinkler system |
With sprinkler systemc |
|
|
|
|
|
| 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 |
1 |
0.5 |
| I-2a, I-4 |
All |
Not permitted |
0 |
| I-1, I-3 |
All |
Not permitted |
1b |
a. For
requirements for occupancies in Group I-2, see IBC sections 407.2 and
407.3.
b. For a reduction in the
fire-resistance rating for occupancies in Group I-3, see IBC section
408.8.
c. Buildings equipped
throughout with an automatic sprinkler system in accordance with section
903.3.1.1 or 903.3.1.2, where allowed.
Subp.
2.
IFC section 1018.6.
IFC section 1018.6 is amended by modifying the exceptions to
read as follows:
Exceptions:
1. Foyers,
lobbies, or reception rooms constructed as required for corridors shall not be
construed as intervening rooms if the aggregate area of these spaces does not
exceed 1,000 square feet per floor.
2. Foyers, lobbies, or reception rooms that
are more than 1,000 square feet per floor in aggregate area and other rooms or
spaces that are constructed as required for corridors shall not be construed as
intervening rooms when the rooms or spaces meet the following:
(a) The spaces are not occupied as dwelling
units, sleeping units, incidental uses or hazardous uses.
(b) The rooms, spaces, or corridors are
protected by an automatic smoke detection system that initiates alarm
notification devices in all normally occupied rooms or spaces that use the
corridor for a means of egress.
(c)
The room or space is arranged so that it does not obstruct access to the
required exits.
(d) Group R
occupancies shall be provided with an automatic sprinkler system throughout to
allow the use of exception #2.
Notes
Minn. R. agency
151, ch. 7511, pt. 7511.1018
40 SR 1437
Renumbered
from 7511.1017
44
SR 610, eff. 3/31/2020
Statutory Authority: MS s
326B.02
