| OCCUPANCY TYPE (new building) |
CODE REF. | INTERIOR WALL AND CEILING FINISH |
| AMBULATORY (Sprinklered) | NFPA 101, 2012 (20.3.3, 38.3.3.2, and 10.2.3) | Class A, B, or C |
| AMBULATORY (Not Sprinklered) | NFPA 101, 2012 (20.3.3, 38.3.3.2 and 10.2.7) | Class A, or B in exits or corridors Class A, B, or C in offices |
| BUSINESS (Sprinklered) | NFPA 101, 2012 (38.3.3.2 and 10.2.3) | Class A, B, or C |
| BUSINESS (Not Sprinklered) | NFPA 101, 2012 (38.3.3.2 and 10.2.3) | Class A, or B in exits or corridors Class A, B, or C in offices |
| HEALTHCARE | NFPA 101, 2012 (18.3.3.2 and 10.2.3) | Class A, or B |
| EDUCATIONAL | (14.3.3.2 and 10.2.3) | Class-A for Exit Enclosures Class-B or Class-A for other than exits Class-C, Class-B or Class-A for low height partitions <1525mm |
| ONE & TWO FAMILY DWELLINGS |
(24.3.3.1 and 10.2) | Class-A, Class-B or Class-C |
| HOTELS AND DORMITORIES |
(28.3.3.2 and 10.2) | Class-A for Exit Enclosures Class-B or Class-A for Lobbies and Corridors Class-C, Class-B or Class-A for other spaces |
| APARTMENTS |
(30.3.3.2 and 10.2) | Class-A for Exit Enclosures Class-B or Class-A for Lobbies and Corridors Class-C, Class-B or Class-A for other spaces |
| MERCANTILE |
(36.3.3.2 and 10.2) | Class B or Class-A |
| STORAGE |
(42.3.3.2 and 10.2) | Class-C, Class B or Class-A |
Flame Spread Ratings
Class A – Flame-spread 0-25, smoke developed 0-450.
Class B – Flame-spread 26-75, smoke developed 0-450.
Class C – Flame-spread 76-200, smoke developed 0-450.
(what-is-flame-spread-and-smoke-developed?)
The requirements pertaining to interior finish are intended to restrict the spread of fire over the continuous surface forming the interior portions of a building.
“Interior wall or ceiling finish that is required elsewhere in this Code to be Class A, Class B, or Class C shall be classified based on test results from NFPA 255, ASTM E-84, or UL 723.”
Notes:
- Code Reference used is NFPA-101 2012 edition unless otherwise noted.
- These information is not complete and intended to be used as quick references only, always refer to NFPA or your local codes for complete information.