Door Overview
| Nominal Size | 34" x 80" |
|---|---|
| Exact Door Size | 33-3/4" x 79-1/4" |
| Thickness | 1-3/4" |
| Approx. Weight | 132 lb |
| Lock Location | 41-7/8" from top (centerline) |
| Hinge Location | 4-7/8", 35-1/8", 65-3/8" from top |
| Fire Rating | 90 Minutes |
| Door Material | 20-Gauge Galvanized Steel |
| Core | Honeycomb |
| Finish | Galvannealed (Corrosion Resistant) |
| SKU | 3480SDOKINLH |
Steel Door Specifications
34 x 80 hollow metal door slab — 20-gauge galvannealed steel, 1-3/4" thick, with a cylindrical (knob or lever) lock prep and a 90-minute fire rating. Common in wide corridor and commercial entry openings. In stock at our Brooklyn and Brentwood warehouses.
Specifications
| Nominal size | 34" x 80" |
| Actual slab size | 33-3/4" x 79-1/4" |
| Thickness | 1-3/4" |
| Steel | 20-gauge galvannealed (corrosion resistant) |
| Core | Insulated honeycomb |
| Fire rating | 90 minutes |
| Lock prep | Cylindrical — 2-1/8" bore, 2-3/4" backset (ANSI 161) |
| Hinge prep | Universal 4-1/2", 7-gauge reinforcement |
| Edges | Inverted top and bottom channels |
| Approx. weight | 132 lb |
| Compliance | ANSI compliant, made in USA |
Technical documents
Factory prep specifications for this door — free to download.
PDFCylindrical Lock Prep — Data SheetUFD-DS-161 · ANSI/BHMA A156.115
PDFHinge Locations — Stock Door Sizes4-1/2" hinges · measured from inside top of frame
Need a drawing for a non-stock size or a different prep? Call 718-841-0767.
Which handing do I need?
Stand on the outside of the door — the side you push from. Hinges on the left is Left Hand; hinges on the right is Right Hand. See the swing chart in the product photos if you are not sure.
What's included
One 34 x 80 steel door slab, cylindrical prepped. Frame, hinges and lock hardware are sold separately.
Pickup, delivery and installation
Pick up at our Brooklyn or Brentwood warehouse, local delivery throughout NYC, or LTL freight nationwide. We also install — contact us for a combined door, hardware and installation quote, or for contractor and bulk pricing.
Listings & Approvals
Certifications & Standards
| Fire Rating | 90 Minutes (UL 10C) — tested and certified for 90-minute fire protection |
|---|---|
| FDNY Certificate | Approved for installation in all NYC boroughs |
| NYC DOB Approval | Meets all Department of Buildings requirements |
| IBC / NFPA | Conforms to International Building Code standards |
| ANSI | Meets ANSI A250.8 standards for commercial steel doors |
Required Tools
- Level (minimum 48")
- Hammer drill with masonry bits
- Screwdriver set or impact driver
- Shims (wood or steel)
- Safety equipment (gloves, glasses)
Installation Steps
- Verify opening dimensions and ensure rough opening is plumb and square.
- Position frame in opening and secure with temporary bracing.
- Level frame using shims at anchor points.
- Install anchors per specifications (typically 12" from corners, 24" on center).
- Verify door operation before removing temporary bracing.
- Install fire-rated seals and threshold.
- Apply required labels and conduct final inspection.
Important: All fire-rated doors must be installed by licensed professionals in accordance with NYC building codes. Improper installation voids fire rating and warranty.
What's the lead time for custom sizes?
3-5 Business days, Next day expedition available
Does this come primed or painted?
For an additional fee
Is installation included?
No
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Trusted by NYC contractors & property managers
Aj Peralta
★★★★★
Highly recommended.
Easy transaction, fast courteous response and they offer discounts.Most importantly, they truly value their customers.Work done was excellent and product was great quality.I am very satisfied.
Brad Waltman
★★★★★If I could give Universal 10 stars I would
If I could give Universal 10 stars I would, from their communication, quality of work, and their employees, I was genuinely impressed by them all. I had 2 doors installed in my facility by their crews and they did phenomenal work. I had ...
Alexander Morrison
★★★★★
As an Interior Designer I recently had the pleasure of working with the wonderful staff at Universal Fire Proof Doors.
I had commissioned them to design, fabricate, deliver and install a really beautiful Full French Motif Door for the main entrance to one of my clients Mix Use Residential buildings in Brooklyn Heights, NY.Not only did they deliver a gre...
J.D.
★★★★★
Universal fire door made our door purchase so easy.
We told them what we needed and they worked with us to get our beautiful front entry door. We needed a high security option for our office front.Universal are thorough in their email and phone communication to avoid any errors on sizing ...
Forever New Construction Inc.
★★★★★We hired Universal Fireproof Doors and had a fantastic experience from start to finish.
The entire team was professional, efficient, and reliable. A special shoutout to Lorena, who was absolutely amazing, knowledgeable, responsive, and a pleasure to work with. She made the whole process smooth and stress-free. Highly recomm...
Zina L
★★★★★
True professionals!
We needed - what else - fireproof doors. Called this place, they sent someone to take the measurements, we were provided with a quote, ordered the doors, they were manufactured, and installed. All was done professionally and perfectly....
Cassandra Metzger
★★★★★I always have a great experience working with Universal.
We have ordered several fire rated doors for our NYC properties and Lorena is a pleasure to deal with. They can usually provide an estimate for door replacements just with pictures, making my life easier, install is seamless and turnarou...
Evette Robledo
★★★★★
As the manager for my family building, I answer to a trust.
I was a bit nervous about my choice to choose UFD. Truth of the matter is everything was handled with care, from customer service, estimate, fabrication and install. Any questions or changes that needed to be done, where answered and cha...
tom king
★★★★★
Outstanding customer service and fair pricing
We have been using them for over 15 yearsFrom start to finish always a smooth processProfessional at its finest
Michael P
★★★★★
The workers were punctual, polite, and respectful of the property,
their work was professional and much neater than I thought it would be considering the doorframe butted right up against new Sheetrock on the inside,which they didn’t leave a scratch on it 👌,,, the price was great, and anyone I spoke to ...
Why contractors buy from Universal Fireproof Door
We're not a reseller — we're the fabricator.
Main fabricators, not a reseller
Every door is built in-house. No middlemen, no markup.
Made in New York
Fabricated on Long Island. Local pickup and same-day service in NYC.
Fast turnaround
Standard doors ship in 24–72 hours. Custom sizes handled quickly.
Bulk order discounts
Competitive pricing for contractors, property managers and developers.
Special requirements
Non-standard sizes, custom preps and special hardware, built in our shop.
FDNY + UL certified
Meets NYC building codes and fire safety standards.
Need it fast or custom?
Special sizes, preps and requirements with quick lead times.
Call (718) 455-8442
Professional installation
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Bulk pricing on 5+ doors with fast turnaround.