Fire-Rated Steel Door Units — 90-Minute Door, Frame & Hardware
Fire-Rated Steel Door Units90-Minute Door, Frame & Hardware
A complete 90-minute fire-rated opening in one order: a 20-gauge hollow metal door, a 16-gauge welded or knock-down frame, three self-closing spring hinges and a UL fire-rated knob or lever lock in storeroom, entrance or passage function.
Complete Fire-Rated Door Unit
Door, frame, hinges and lock in one package for stairwells, boiler rooms, corridors and any opening that calls for a 90-minute door. Choose size, frame and throat depth, then lock, function and swing.
Fire-Rated Steel Door Unit — ready to install
- 90-minute steel door20-ga, 1-3/4", cylindrical prep
- 16-gauge steel frameWelded 4 7/8" · Knock-down 3 3/4", 4 7/8" or 6 1/8"
- Knob or lever lockUL fire-rated · storeroom, entrance or passage
- (3) spring hinges4-1/2" self-closing, satin chrome
Fire-Rated Door Units in Stock Sizes
Nominal door size (width × height, inches). Pick knob or lever here, then choose frame, throat depth, lock function and swing on the product page.
Everything for one fire-rated opening
- 20-gauge hollow metal door1-3/4" thick, flush, cylindrical prep, 90-minute fire rated
- 16-gauge steel frameWelded (4 7/8" throat) for masonry & block, or knock-down (3 3/4", 4 7/8" or 6 1/8") for drywall
- (3) 4-1/2" UL spring hingesSelf-closing, square corner, satin chrome
- UFD knob or lever lockUL fire-rated · storeroom, entrance or passage function
| 20-ga steel door, cylindrical prep | $398.48 |
|---|---|
| 16-ga steel frame (welded or knock-down, any throat) | $207.00 |
| (3) spring hinges | $50.00 |
| Knob lock 7204 — or — lever lock 7201 | $51.75 / $93.15 |
| Unit total | $707.23 / $748.63 |
Welded or knock-down?
Throat depth is the overall wall thickness the frame wraps. Pick the frame type, then the throat that matches your wall.
Welded frame
One rigid piece with welded corners, set as the wall goes up. The strongest option for masonry and concrete block walls and new construction.
Masonry & block wallsThroat: 4 7/8"Knock-down frame
Ships in three pieces and wraps a finished drywall opening — ideal for retrofits and tenant fit-outs. 3 3/4" fits 2-1/2" studs, 4 7/8" fits 3-5/8" studs (5/8" drywall each side), 6 1/8" fits thicker walls.
Drywall / stud wallsThroat: 3 3/4" · 4 7/8" · 6 1/8"Fire-rated, ready to install
90-minute door
Rated for stairwells, boiler, mechanical and electrical rooms and corridors where a 90-minute opening is specified.
Self-closing & latching
Spring hinges close the door and the UL-listed lock latches it — the two things a fire door has to do.
Need 3 hours?
3-hour units for fire walls and shafts are built to order. Send us the opening and we'll quote it.
How to pick the right swing
Stand on the outside of the opening — the side the door swings away from.
Right hand: hinges on the right, door swings away from you.
Left hand: hinges on the left, door swings away from you.
Reverse (RHR / LHR): the door swings toward you — call us if you need a reverse swing.
Measuring: order by nominal door size. A 36" × 80" unit has an actual door of about 35-3/4" × 79-1/4" and an overall frame of about 40" × 82". Check your drawings or local code for the required swing — or send us your rough opening and we'll confirm.
Replacing doors building-wide? Get factory-direct pricing.
Volume pricing on fire-rated door units for multi-door jobs, violations and inspections. Pick up in Brooklyn or Long Island, or have them delivered by our own crew.
Fire-rated door unit questions
What comes with a fire-rated door unit?
A 20-gauge, 1-3/4" hollow metal door with a 90-minute fire rating, a 16-gauge welded or knock-down steel frame, three 4-1/2" self-closing spring hinges and a UL fire-rated UFD knob or lever lock.
Do you sell 3-hour fire-rated door units?
Yes, built to order. 3-hour units are quoted per opening — call (718) 455-8442 or request a quote.
Which lock function should I pick?
Storeroom is always locked outside (key only) with free exit inside — best for mechanical, electrical and storage rooms. Entrance locks with a push button inside and a key outside — best for offices and tenant doors. Passage never locks — best for corridors and stairwells.
Knob or lever?
Knob locks are the lower-cost option ($707.23 unit total). Lever locks ($748.63 unit total) are easier to operate and are often required where accessibility (ADA) applies.
Welded or knock-down frame — which do I need?
Choose welded for masonry or block walls and new construction (4 7/8" throat). Choose knock-down for an existing drywall or stud wall: 3 3/4", 4 7/8" or 6 1/8" throat to match your wall thickness.
How do I get my door unit?
Pick up at our Brooklyn or Long Island location, or we deliver to your job site. Installation is available in NYC, Nassau and Suffolk. Call (718) 455-8442.