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20-minute doors
20-minute fire doors.
The most common rated door in hotels, apartments, offices and schools: corridor and entry doors in fire partitions and smoke barriers.
- Tested to UL 10C without hose stream, typically with S-label
- Particleboard or composite core, 1-3/4 inch
- Veneer, paint-grade or laminate faces
Where 20-minute doors are used
- Guestroom entry doors from hotel corridors
- Apartment entry doors from common corridors
- Corridor doors in offices, schools and healthcare
- Doors in smoke barriers, together with smoke and draft control
What makes them pass
- Positive-pressure listing with the edge seals the listing names
- Self-closing and positive-latching hardware
- Smoke gasketing for the S-label, installed per NFPA 105
- Vision panels only with glass marked D-20, up to the size tested
How we supply rated doors
- Every fire-rated door we supply is built and labeled by a manufacturer that holds the listing for that door with a nationally recognized testing laboratory, such as UL or Intertek (Warnock Hersey), and is inspected under the lab's follow-up service.
- The label is applied at the factory. We never apply, move or replace fire labels, and we do not field-label.
- We take your door schedule and hardware schedule, check each opening against the listing, and have doors factory-machined for your hinges, locks, closers and electrified hardware.
- Matching non-rated doors in the same veneer, paint or laminate come from the same order, so a corridor looks the same whether a door is rated or not.
- Documentation for submittals and closeout: listing references, label type per opening, hardware compatibility and installation instructions.
Questions
Frequently asked.
Do 20-minute doors need a closer?
Yes. Fire doors must be self-closing or automatic-closing and positive-latching. Guestroom and apartment entry doors therefore get a closer and a latching lock.
Is a 1-3/4 inch solid core door the same as a 20-minute door?
No. Only a door listed and labeled as a 20-minute fire door counts, even if a solid core door looks the same.
Can 20-minute doors have glass?
Yes, with fire-rated glazing marked D-20 in a listed lite kit, up to the maximum size the listing allows.
Code summary for orientation, based on the International Building Code (IBC), NFPA 80, NFPA 105 and the 2010 ADA Standards. Requirements depend on the code edition your jurisdiction has adopted and on local amendments. The architect of record and the authority having jurisdiction (AHJ) decide for your project.
Related
Send us your openings.
Door schedule, hardware sets and elevations. Answer within 12 hours, with every opening checked against the listing.
Your contact: Daniel Helmut Pinger, Tischlermeister
+49 (0) 228 76383681 · sales@lignosupply.com