Fire Rated Door Labels / Ratings
Doors and frames are rated and given a label after extensive testing by the Underwriters Laboratory. Rated doors must be self-closing and must have a positive latch.
| UL Label | Rating | Rating | Max Glass Area |
| A | 3 HR | 180 MIN | 100 square inches per leaf |
| B | 1 1/2 HR | 90 MIN | 100 square inches per leaf |
| C | 3/4 HR | 45 MIN | 1296 square inches per lite |
| D | 1 1/2 HR | 90 MIN | Refer to local codes |
| E | 3/4 HR | 45 MIN | Refer to local codes |
| 1/3 HR | 20 MIN | 1296 square inches per lite | |
| S | SMOKE | SMOKE |
UL Labels D and E are for exterior doors that are subject to fire hazards from the outside of the door.
Refer to the codes applicable to your specific jurisdiction for label or rating requirements.
2004 CSI Masterspec Division
Metal Doors and Frames: 08 11 00
Metal Frames: 08 12 00
Metal Doors: 08 13 00
Wood Doors: 08 14 00
Plastic Doors: 08 15 00
Composite Doors: 08 16 00
Integrated Door Opening Assemblies: 08 17 00
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