Current through Register Vol. 48, No. 51, June 17, 2024
Part 7511.1018 - SECTION 1018, CORRIDORSSubpart 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 407.3b. 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