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803.13 Interior Finish Requirements Based on Occupancy
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Interior wall and ceiling finish shall have a flame spread index not greater than that specified in Table 803.13 for the group and location designated. Interior wall and ceiling finish materials tested in accordance with NFPA 286 and meeting the acceptance criteria of Section 803.1.1.1, shall be permitted to be used where a Class A classification in accordance with ASTM E84 or UL 723 is required.
| GROUP | SPRINKLEREDl | NONSPRINKLERED | ||||
| Interior exit stairways and ramps and exit passagewaysa, b |
Corridors and enclosure for exit access stairways and ramps |
Rooms and enclosed spacesc |
Interior exit stairways and ramps and exit passagewaysa, b |
Corridors and enclosure for exit access stairways and 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 | Cm | 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 | ||||
For SI: 1 inch = 25.4 mm, 1 square foot = 0.0929 m2.
- Class C interior finish materials shall be permitted for wainscotting or paneling of not more than 1,000 square feet of applied surface area in the grade lobby where applied directly to a noncombustible base or over furring strips applied to a noncombustible base and fireblocked as required by Section 803.15.1.
- In other than Group I-3 occupancies in buildings less than three stories above grade plane, Class B interior finish for nonsprinklered buildings and Class C interior finish for sprinklered buildings shall be permitted in interior exit stairways and ramps.
- Requirements for rooms and enclosed spaces shall be based on spaces enclosed by partitions. Where a fire-resistance rating is required for structural elements, the enclosing partitions shall extend from the floor to the ceiling. Partitions that do not comply with this shall be considered to be enclosing spaces and the rooms or spaces on both sides shall be considered to be one room or space. In determining the applicable requirements for rooms and enclosed spaces, the specific occupancy thereof shall be the governing factor regardless of the group classification of the building or structure.
- Lobby areas in Group A-1, A-2 and A-3 occupancies shall be not less than Class B materials.
- Class C interior finish materials shall be permitted in places of assembly with an occupant load of 300 persons or less.
- For places of religious worship, wood used for ornamental purposes, trusses, paneling or chancel furnishing shall be permitted.
- Class B material is required where the building exceeds two stories.
- Class C interior finish materials shall be permitted in administrative spaces.
- Class C interior finish materials shall be permitted in rooms with a capacity of four persons or less.
- Class B materials shall be permitted as wainscotting extending not more than 48 inches above the finished floor in corridors and exit access stairways and ramps.
- Finish materials as provided for in other sections of this code.
- Applies when protected by an automatic sprinkler system installed in accordance with Section 903.3.1.1 or 903.3.1.2.
- Corridors in ambulatory care facilities shall be provided with Class A or B materials.
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