3.1.13.7.High Buildings

(1) Except as permitted by Sentences (2) to (4), 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 3.1.13.11. and to the flame-spread rating and smoke developed classification values in Table 3.1.13.7. (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. (3) Trim and millwork in an exit stairway, 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. Table 3.1.13.7. Flame-Spread Rating and Smoke Developed Classification in High Buildings Forming Part of Sentences 3.1.13.7.(1) and (2) Maximum Smoke Developed Maximum Flame-Spread Rating Classification Location or Element Wall Ceiling Floor Wall Ceiling Floor Surface Surface(1) Surface Surface Surface(1) Surface Exit stairways, vestibules to exit stairs and lobbies 25 25 25 50 50 50 described in Sentence 3.4.4.2.(2) Corridors not within suites (2) (2) 300 100 50 500 Elevator cars 75 75 300 450 450 450 Elevator vestibules 25 25 300 100 100 300 Service spaces and service rooms 25 25 25 50 50 50 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. (4) A door serving an exit stairway, 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 (a) it has a flame-spread rating not more than 200, (b) it has a smoke developed classification not more than 300, and (c) the aggregate area of all doors is not more than 10% of the area of the wall in which they are located. (5) Except as permitted in Sentences (6) to (8), plumbing fixtures in a building regulated by the provisions of Subsection 3.2.6. shall have a smoke developed classification not more than 300. (6) A plumbing fixture that is not located in a Group B occupancy need not comply with Sentence (5) if the building is sprinklered throughout. (7) 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 building is sprinklered throughout. (8) A therapeutic bathing system in a Group B occupancy need not comply with Sentence (5) if the room in which it is located, (a) does not open directly into patients’ or residents’ sleeping rooms, and (b) is sprinklered.