Minnesota Administrative Rules
Agency 171 - Public Safety Department
Chapter 7511 - FIRE CODE
Part 7511.1018 - SECTION 1018, CORRIDORS
Universal Citation: MN Rules 7511.1018
Current through Register Vol. 48, No. 39, March 25, 2024
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.
Statutory Authority: MS s 326B.02
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