Class A: | = | Flame spread index 0-25; smoke- developed index 0-450. |
Class B: | = | Flame spread index 26-75; smoke- developed index 0-450. |
Class C: | = | Flame spread index 76-200; smoke- developed index 0-450. |
Exception: Materials tested in accordance with Section 803.1.2.
TABLE 803.9
INTERIOR WALL AND CEILING FINISH REQUIREMENTS BY OCCUPANCYk
GROUP | SPRINKLEREDl | NONSPRINKLERED | ||||
Interior exit stairways, interior exit ramps and exit passagewaysa, b | Corridors and enclosure for exit access stairways and exit access ramps | Rooms and enclosed spacesc | Interior exit stairways, interior exit ramps and exit passagewaysa, b | Corridors and enclosure for exit access stairways and exit access ramps | Rooms and enclosed spacesc | |
A-1 & A-2 | B | B | C | A | Ad | Be |
A-3f, A-4, A-5 | B | B | C | A | Ad | C |
B, E, M, R-1 | B | C | C | A | B | C |
R-4 | B | C | C | A | B | B |
F | C | C | C | B | C | C |
H | B | B | Cg | A | A | B |
I-1 | B | C | C | A | B | B |
I-2 | B | B | Bh, i | A | A | B |
I-3 | A | Aj | C | A | A | B |
I-4 | B | B | Bh, i | A | A | B |
R-2 | C | C | C | B | B | C |
R-3 | C | C | C | C | C | C |
S | C | C | C | B | B | C |
U | No restrictions | No restrictions |
Exceptions:
Exception: In Types III and V construction, fire-retardant-treated wood shall be permitted for use as hangers and assembly members of dropped ceilings.
Exceptions:
Exception: Where a building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2, Class II materials are permitted in any area where Class I materials are required, and materials complying with DOC FF-1 “pill test” (CPSC 16 CFR Part 1630) or with ASTM D 2859 are permitted in any area where Class II materials are required.
In Groups I-1 and I-2, combustible decorative materials shall meet the flame propagation criteria of NFPA 701 unless the decorative materials, including, but not limited to, photographs and paintings, are of such limited quantities that a hazard of fire development or spread is not present. In Group I-3, combustible decorative materials are prohibited.
Fixed or movable walls and partitions, paneling, wall pads and crash pads applied structurally or for decoration, acoustical correction, surface insulation or other purposes shall be considered interior finish if they cover 10 percent or more of the wall or of the ceiling area, and shall not be considered decorative materials or furnishings.
In Group B and M occupancies, fabric partitions suspended from the ceiling and not supported by the floor shall meet the flame propagation performance criteria in accordance with Section 806.2 and NFPA 701 or shall be noncombustible.
Exceptions: