90-Minute Fire-Rated Hollow Metal Double Doors – 6’0” x 7’0”

90-Minute Fire-Rated Hollow Metal Double Doors – 6’0” x 7’0”

Constructed from heavy-duty sheet steel, these 90-minute fire-rated HM double doors deliver superior life-safety protection, physical security, and exceptional thermal performance. Engineered to meet rigorous commercial building codes, this 6’0” x 7’0” assembly provides maximum structural strength with a smooth, effortless operation—making it the ideal solution for high-traffic corridors, industrial bays, equipment rooms, and commercial exits.

The fire-resistant, insulated core serves a dual purpose: providing emergency fire containment while acting as an effective sound and thermal barrier. Built from heavy-gauge galvanized steel, hollow metal doors far outlast traditional wood or aluminum doors, resisting rot, warping, pests, and forced entry to deliver unmatched long-term return on investment (ROI).

Featuring a sleek profile and standard 1 3/4” door thickness, each door arrives with a smooth, factory-applied primer, ready for job-site painting to match your project’s aesthetic.

Key Features & Added Benefits

• Certified 90-Minute Fire & Smoke Protection: Rigorously tested to withstand extreme heat and delay fire spread for up to 90 minutes, providing critical evacuation time and limiting property damage.

• Warp, Rot, and Moisture Resistance: Unlike wood or composite doors, steel will never warp, twist, swell, split, or rot when exposed to humidity or dramatic temperature swings.

• High Security & Forced-Entry Resistance: High-tensile steel construction provides extreme impact resistance, guarding your building against break-ins, vandalism, and unauthorized access.

• Insulated Acoustic & Thermal Core: The fire-resistant insulated core drastically improves energy efficiency while offering superior Sound Transmission Class (STC) noise reduction between rooms.

• Pest & Mold Impervious: Completely immune to termites, pests, mold, and mildew growth—ensuring sanitary, long-lasting performance in industrial and commercial environments.

• Low Maintenance & Long Lifecycle: High durability translates to minimal maintenance costs over decades of operation, offering the lowest total cost of ownership in commercial door systems.

• Nominal Double Door Size: 6’0” x 7’0” (72” x 84”)

• Single Door Size: 3’0” x 7’0” (36” x 84”)

• Actual Door Size: 35 3/4” x 83 1/8” per leaf

• Door Thickness: Standard 1 3/4” commercial profile

• Finish: Factory-primed and ready for custom paint application

• Universal Compatibility: Fully compatible with standard commercial fire-rated hardware, panic bars, surface closers, and frames nationwide.

Rough Opening Guidelines

To ensure proper framing and installation, determine your frame style prior to preparing your wall opening:

Wrap Around Type (Most Common)

• Application: Standard stud wall construction (drywall with metal or wood studs).

• Calculation Formula: Add 2” to total nominal width and 1 1/8” to door height.

• Calculated Rough Opening: 74” W x 85 1/8” H

Butt Up Type

• Application: Masonry and concrete construction (CMU block walls).

• Calculation Formula: Add 4 1/4” to total nominal width and 2 1/8” to door height.

• Calculated Rough Opening: 76 1/4” W x 86 1/8” H

Summary: These 6’0” x 7’0” 90-minute fire-rated HM double doors offer an unbeatable combination of fire safety, security, energy efficiency, and long-term durability, making them the industry standard for commercial steel entrances across North America.