The Ontario Building Code | High Buildings
3.1.13.7. High buildings
(1) Except as permitted by Sentences (2) and (3), the interior wall, ceiling and floor finishes in a building regulated by the provisions of Subsection 3.2.6. shall conform to the flame-spread rating requirements in Articles 3.1.13.2. to 3.1.13.6. and to the flame-spread rating and smoke developed classification values in Table 3.1.13.7.
Table 3.1.13.7.
Flame-Spread Rating and Smoke Developed Classification in a High Building
Forming Part of Sentences 3.1.13.7.(1) and (2)
| Item | Column 1 | Column 2 | Column 3 | Column 4 | Column 5 | Column 6 | Column 7 |
|
| Location or Element | Maximum Flame-Spread Rating | Maximum Smoke Developed Classification | ||||
|
|
| Wall Surface | Ceiling Surface (1) | Floor Surface | Wall Surface | Ceiling Surface (1) | Floor Surface |
| 1. | Exit stairways, vestibules to exit stairs and lobbies described in Sentence 3.4.4.2.(2) | 25 | 25 | 25 | 50 | 50 | 50 |
| 2. | Corridors not within suites | (2) | (2) | 300 | 100 | 50 | 500 |
| 3. | Elevator cars | 75 | 75 | 300 | 450 | 450 | 450 |
| 4. | Elevator vestibules | 25 | 25 | 300 | 100 | 100 | 300 |
| 5. | Service spaces and service rooms | 25 | 25 | 25 | 50 | 50 | 50 |
| 6. | Other locations and elements | (2) | (2) | No limit | 300 | 50 | No limit |
Notes to Table 3.1.13.7.:
(1) See Sentence 3.1.13.4.(1) for lighting elements.
(2) Other requirements of this Part apply.
(2) Except for a building of Group B major occupancy and elevator cars, the flame-spread rating and smoke developed classification of interior wall, floor and ceiling finishes need not conform to the values in Table 3.1.13.7., provided the building is sprinklered and the sprinkler system is electrically supervised in conformance with Sentences 3.2.4.10.(3) and 3.2.4.17.(1).
(3) Trim, millwork and doors in an exitstairway, a vestibule to an exit stairway, a lobby described in Sentence 3.4.4.2.(2), or a corridor not within a suite need not conform to the flame-spread rating and smoke developed classification requirements of Sentence (1), provided they have,
(a) a flame-spread rating not more than 150,
(b) a smoke developed classification not more than 300, and
(c) an aggregate area not more than 10% of the area of the wall or ceiling on which they occur.
(4) Except as permitted in Sentences (5) to (7), plumbingfixtures in a building regulated by the provisions of Subsection 3.2.6. shall have a smoke developed classification not more than 300.
(5) A plumbing fixturethat is not located in a Group B occupancy need not comply with Sentence (4) if the building is sprinklered.
(6) A plumbing fixture may have a smoke developed classification more than 300 but not more than 500 if,
(a) it is in a room where the wall surfaces have a smoke developed classification not more than 200, and
(b) it is located in,
(i) a Group C occupancy, or
(ii) a Group B occupancy and the buildingis sprinklered.
(7) A therapeutic bathing system in a Group B occupancyneed not comply with Sentence (4) if the room in which it is located,
(a) does not open directly into patients’ or residents’ sleeping rooms, and
(b) is sprinklered.