• Steel door slab with mortise lock prep — hardware not included
  • UFD door swing chart — know your door handing
  • Steel door slab in the UFD warehouse
  • Angled view of the lock edge and mortise pocket
  • Hinge edge with seven gauge hinge reinforcements
  • Mortise lock pocket interior
  • Close-up of the mortise lock prep cutouts
1 7
90 MIN FIRE RATED

34 x 96 Steel Door Slab, Mortise Prep – 20 Gauge, Fire-Rated - 90 Min

34 x 96 Steel Door Slab, Mortise Prep – 20 Gauge, Fire-Rated - 90 Min

SKU #: 3496SDS-M-RH

$385.00 (EACH)
$385.00
In Stock Ships Same Day or Next Business Day
Door Handing
Need custom dimensions or bulk pricing? Send us your measurements for a custom quote →
  • In StockIn Stock
  • Ships FastShips Fast
  • Code-CompliantCode-Compliant
Need help now?
8AM-4PM CALL US NOW
4PM-8PM REQUEST QUOTE
View full details

Product Information

34 x 96 hollow metal door slab — 20-gauge galvannealed steel, 1-3/4" thick, with a 7-7/8" mortise lock pocket and a 90-minute fire rating. Common in wide, tall commercial openings. In stock at our Brooklyn and Brentwood warehouses.

Door Overview
Exact Door Size 33-3/4" x 95-1/4"
Thickness 1-3/4"
Mortise Pocket 7-7/8"
Approx. Weight 159 lb
Fire Rating 90 Minutes
Material 20-Gauge Galvanized Steel

Steel Door Specifications
  • Honeycomb core insulated construction
  • Galvannealed steel (standard)
  • 7-gauge hinge reinforcements
  • Reinforced lock prep (161 prep)
  • ANSI compliant
  • Universal 4-1/2 hinge prep
  • Made in USA
  • Inverted top and bottom channels

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 96 steel door slab, mortise 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.

Fire & Code Compliance
UL Listed
FDNY Approved
NYC DOB
IBC Compliant

Fire Rating

90 Minutes (UL 10C) - Tested and certified for 90-minute fire protection. Suitable for commercial and industrial fire-rated openings.

Certifications & Standards

  • FDNY Certificate: Approved for installation in all NYC boroughs
  • NYC DOB Approval: Meets all Department of Buildings requirements
  • IBC/NFPA Compliant: Conforms to International Building Code standards
  • ANSI Certified: Meets ANSI A250.8 standards for commercial steel doors

Installation Guidelines

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:

  1. Verify opening dimensions and ensure rough opening is plumb and square.
  2. Position frame in opening and secure with temporary bracing.
  3. Level frame using shims at anchor points.
  4. Install anchors per specifications (typically 12" from corners, 24" on center).
  5. Verify door operation before removing temporary bracing.
  6. Install fire-rated seals and threshold.
  7. 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.

Material Specifications
Door Material 20-Gauge Galvanized Steel
Core Insulation Honeycomb
Finish Standard Galvannealed (Corrosion Resistant)

Trusted by thousands of happy customers

Installed in Brooklyn 12-unit building
Passed FDNY inspection
Highly recommended. "Highly recommended."- Aj Peralta 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 ...
B "If I could give Universal 10 stars I would"- Brad Waltman 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 ...
As an Interior Designer I recently had the pleasure of working with the wonderful staff at Univer... "As an Interior Designer I recently had the pleasure of working with the wonderful staff..."- Alexander Morrison 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 build...
Universal fire door made our door purchase so easy. "Universal fire door made our door purchase so easy."- J.D. 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 ...
F "We hired Universal Fireproof Doors and had a fantastic experience from start to finish."- Forever New Construction Inc. 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 ...
True professionals! "True professionals!"- Zina L 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...
C "I always have a great experience working with Universal."- Cassandra Metzger 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 pictu...
As the manager for my family building, I answer to a trust. "As the manager for my family building, I answer to a trust."- Evette Robledo 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 questio...
Outstanding customer service and fair pricing "Outstanding customer service and fair pricing"- tom king We have been using them for over 15 yearsFrom start to finish always a smooth processProfessional at its finest
The workers were punctual, polite, and respectful of the property, "The workers were punctual, polite, and respectful of the property,"- Michael P 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 sc...
Read all reviews

Why Buy Direct from Universal?

  • 25% Savings

    25% Savings

    vs. distributors

  • Fast Delivery

    Fast Delivery

    same-day pickup on stock items

  • Expert Support

    Expert Support

    24/7 available
⚠️ Steel prices fluctuate weekly — lock in today
🔥 Only 12 left in stock
⏱️ Next delivery: 1–2 business days
Lock In Order

Professional Installation Services

Expert door and hardware installation for residential and commercial projects.

Request Installation

Why Contractors Buy From Universal Fireproof Door

We're not a reseller — we're the main fabricators

  • Main Fabricators — Not a Reseller

    We manufacture every door in-house. No middlemen, no delays, no markup.

  • Made in New York

    Fabricated in Long Island, NY. Local pickup and same-day service available for NYC contractors.

  • Fast Turnaround on Standard & Custom Doors

    Standard doors ship in 24-72 hours. Custom orders? We can handle special sizes and specs quickly.

  • Bulk Order Discounts Available

    Multi-door projects? We offer competitive bulk pricing for contractors, property managers, and developers.

  • Special Requirements? We Can Fabricate It

    Non-standard sizes, custom preps, special hardware — we handle it all in our facility.

  • FDNY + UL Certified

    All doors meet NYC building codes and fire safety standards. Pass inspection guaranteed.

Need this fast or slightly different?

We fabricate in-house and can handle special sizes, preps, and requirements with quick lead times.

Call (718) 455-8442

Working on a Multi-Door Project?

We offer bulk pricing for contractors, property managers, and developers.

Call for Same-Day Quote

Get competitive pricing on orders of 5+ doors with fast turnaround

FAQs

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