086 15318950099
3-Hour UL Listed Steel Fire Door
UL 10C LISTED • IBC 2021 COMPLIANT
3-Hour UL Listed Steel Fire Door
When maximum fire protection is mandated, our 3-Hour UL Listed Steel Fire Door provides the highest level of swinging fire door performance available. Certified to UL 10C for 180 minutes of fire endurance and hose stream resistance, this door is engineered for 3-hour and 4-hour fire walls, high-hazard occupancies, and severe exposure areas. Heavy-gauge construction and high-density rock wool core ensure exceptional thermal insulation and structural stability under extreme conditions.
Product Highlights
- ✓ 3-hour (180-minute) fire rating — the maximum for swinging steel doors
- ✓ Rock wool core provides superior thermal insulation for extreme fire exposure
- ✓ UL 10C positive pressure certified with WHI label on every door
- ✓ Heavy-duty construction with continuously welded full-length edge seams
- ✓ Factory pre-hung with 3-hour rated hardware (closers, panic devices, hinges)
- ✓ Engineered for high-hazard occupancies where code demands maximum protection
- ✓ Rock wool core provides superior thermal insulation for extreme fire exposure
- ✓ UL 10C positive pressure certified with WHI label on every door
- ✓ Heavy-duty construction with continuously welded full-length edge seams
- ✓ Factory pre-hung with 3-hour rated hardware (closers, panic devices, hinges)
- ✓ Engineered for high-hazard occupancies where code demands maximum protection
⏱ Quick Response • Factory Direct Delivery • Free Preliminary Quote
UL 10C Certified • 90-Min Fire Rating
Why Choose Our Fire-Rated Steel Doors
Three pillars that set us apart from US distributors and generic suppliers
Factory-Direct Pricing
Skip the distributor markup. Buy directly from the manufacturer and save 20–40% on your project cost. 15 years of experience, 500,000+ doors annual capacity — reliable bulk delivery you can count on.
Full Range UL/CE Ratings
From 20-minute to 3-hour ratings, all certified to UL 10C / NFPA 252 standards. WHI labels shipped with every door. One supplier covers every opening rating requirement in your project — no need to source from multiple vendors.
Quick Quote
For standard configurations and complete specifications, our team strives to provide a preliminary quote within 20 minutes.
METAL DOOR SPECIFICATIONS
Our commercial metal doors are constructed of the highest grade steel and with the following specifications:
- 1-3/4″ Thick, non-handed design with reversible hinge plates
- A40 Galvanized Steel
- Gray primer painted with baked on two stage epoxy resin.
- 18 Gauge Steel Face Sheets
- High-density rock wool core
- Hinge and Lock Edge seams “continuously” welded full length
- 12 Gauge Closer Reinforcement (18″ X 6″)
- 16 Gauge 161 Lock Prep. or 14 Gauge 86 Lock Prep
- 16 Gauge Flush Top Channel / Inverted Bottom Channel
- Square Door Edge
- 10 Gauge Hinge Reinforcement
Fire Ratings Explained
Choose the right UL fire rating for your application — all certified to UL 10C / NFPA 252
20 min
UL Rating: 1/3 hr
Corridors, office partitions, non-rated walls requiring smoke control.
45 min
UL Rating: 3/4 hr
1-hour fire wall openings, stairwells, hotel guest room corridors.
60 min
UL Rating: 1 hr
1-hour fire barriers, exit enclosures, vertical shaft separations.
90 min
UL Rating: 1-1/2 hr
1.5-hour fire walls, hazardous area enclosures, industrial separations.
3 hr
UL Rating: 3 hr
3-hour fire walls, high-hazard occupancy, severe fire exposure areas.
NON-FIRERATED
All ratings come with WHI certification labels affixed to each door. Verify authenticity online via WHI directory.
Door Sizes (All doors = 1-3/4″ thickness)
6′8″ Height
| Door Call Size | Nominal Width | Nominal Height |
|---|---|---|
| 2068 | 2′0″ (24 inch) | 6′8″ (80 inch) |
| 2468 | 2′4″ (28 inch) | 6′8″ (80 inch) |
| ⭐️2668 | 2′6″ (30 inch) | 6′8″ (80 inch) |
| 2868 | 2′8″ (32 inch) | 6′8″ (80 inch) |
| 21068 | 2′10″ (34 inch) | 6′8″ (80 inch) |
| 3468 | 3′4″ (40 inch) | 6′8″ (80 inch) |
| 3668 | 3′6″ (42 inch) | 6′8″ (80 inch) |
| 3868 | 3′8″ (44 inch) | 6′8″ (80 inch) |
| 4068 | 4′0″ (48 inch) | 6′8″ (80 inch) |
7′0″ Height
| Door Call Size | Nominal Width | Nominal Height |
|---|---|---|
| 2070 | 2′0″ (24 inch) | 7′0″ (84 inch) |
| 2470 | 2′4″ (28 inch) | 7′0″ (84 inch) |
| ⭐️2670 | 2′6″ (30 inch) | 7′0″ (84 inch) |
| 2870 | 2′8″ (32 inch) | 7′0″ (84 inch) |
| 21070 | 2′10″ (34 inch) | 7′0″ (84 inch) |
| 3470 | 3′4″ (40 inch) | 7′0″ (84 inch) |
| 3670 | 3′6″ (42 inch) | 7′0″ (84 inch) |
| 3870 | 3′8″ (44 inch) | 7′0″ (84 inch) |
| 4070 | 4′0″ (48 inch) | 7′0″ (84 inch) |
8′0″ Height
| Door Call Size | Nominal Width | Nominal Height |
|---|---|---|
| 2080 | 2′0″ (24 inch) | 8′0″ (96 inch) |
| 2480 | 2′4″ (28 inch) | 8′0″ (96 inch) |
| ⭐️2680 | 2′6″ (30 inch) | 8′0″ (96 inch) |
| 2880 | 2′8″ (32 inch) | 8′0″ (96 inch) |
| 21080 | 2′10″ (34 inch) | 8′0″ (96 inch) |
| 3480 | 3′4″ (40 inch) | 8′0″ (96 inch) |
| 3680 | 3′6″ (42 inch) | 8′0″ (96 inch) |
| 3880 | 3′8″ (44 inch) | 8′0″ (96 inch) |
| 4080 | 4′0″ (48 inch) | 8′0″ (96 inch) |
Configuration Options
Build your door with these customizable options — all factory-prepped for easy installation
Frame Type
/
Panel Styles
Welded
Frame Type
Knocked Down (KD)
Frame Type
Vision Lite
With glass window
Louvered
Ventilation grille
Swing Direction & Handing
LH (Left Hand)
Hinges on left, swings in
RH (Right Hand)
Hinges on right, swings in
LHR (Left Hand Reverse)
Hinges on left, swings out
RHR (Right Hand Reverse)
Hinges on right, swings out
Hardware Prep
Hinge Mortise Prep
Lock Body Prep
Door Closer Prep
Panic Device Prep
Seals & Accessories
Complete your fire door assembly with UL-listed accessories — one-stop solution
Floor Stop
ANSI/BHMA Grade 1 certified floor stop built. fully compliant with NFPA 80, ADA, and California Prop 65.
Threshold
Aluminum/saddle threshold, adjustable height, fire-rated gasketing.
Door Sweep
Bottom seal with neoprene insert, smoke and draft control.
Intumescent Seal
Fire-activated expanding seal, perimeter gasketing for smoke control.
Rain Drip / Canopy
Exterior door weather protection, aluminum hood with drip edge.
Kick Plate
Stainless steel or brass kick plate, 8″/10″/12″ heights available.
Smoke Seal
UL-listed smoke and draft control gasketing, perimeter installation.
Hinges & Closers
UL-listed spring hinges, ball-bearing hinges, and door closers.
Detailed Product Description
Technical Features
- Fire Rating : 180 minutes (3 hours)
- Test Standard : ANSI/UL 10B, CAN/ULC-S104
- Door Skin : 16 ga. galvanized steel (heavy-duty)
- Core : Mineral wool (high-density)
- Temperature Rise : 250°F or 450°F at 30 min (optional)
- Frame : 14 ga. galvanized steel, 3-hour rated
- Max Size : 4'0" × 8'0" single; 8'0" × 8'0" double
- Weight : Approx. 12–15 lbs/sq.ft (depending on core)
Applications
Factory / Warehouse : Critical for chemical storage, spray booths, and high-hazard manufacturing areas requiring maximum fire compartmentalization.
Mechanical Room : Protects transformer rooms, generator enclosures, and central boiler plants with 3-hour fire-rated barriers.
Hospital : Used for hazardous material storage, pharmacy compounding rooms, and central utility plants in healthcare facilities.
Stairwell : Required in high-rise buildings where stairwells serve as areas of refuge and extended egress time is critical.
Frequently Asked Questions
Common questions from buyers, contractors, and distributors
Send Your Project Specs
Tell us your project requirements — door sizes, fire ratings, hardware, quantities, and destination port. Our team will respond with a detailed quote within 24 hours.
Quick Quote Checklist: For the fastest response, include: ① Quantity & door sizes (W×H) ② Fire rating required (20/45/60/90 min or 3hr) ③ Hardware schedule (hinges/lock/closer) ④ Glass/louver requirements ⑤ Finish color (RAL#) ⑥ Destination port & target delivery date.
Get in touch
We're Ready To Assist You Anytime