| Class A |
Division of fire wall.
Rating: 3
hours. |
| Class B |
Enclosure to vertical
communications
through buildings, vertical shafts, etc.
Rating: 1-1/2 hours. |
| Class C |
Openings in corridors and room
partitions.
Rating: 3/4 hour. |
| Class D |
Exterior walls - sever fire
exposure.
Rating: 1/2 hour. |
| Class E |
Exterior walls.
Moderate fire
exposure. |
| Class F |
Exterior walls.
Light exposure. |
| |
|
