Hollow Metal Fire Doors

Cronax Hollow Metal Fire Doors are engineered for maximum safety, durability, and performance in high-risk environments. Built with heavy-duty steel frames and high-quality finishes, these doors provide superior fire protection while maintaining strength and aesthetics.

To ensure unmatched fire resistance, we use premium infill materials such as mineral wool, ceramic-based board, glasswool, rockwool, or honeycomb, depending on the application. These cores allow our fire doors to achieve fire ratings of up to 240 minutes, offering reliable protection against flames, smoke, and heat spread.

Designed for industrial, commercial, and institutional spaces, Cronax Fire Doors also support acoustic control, thermal insulation, and resistance to impact. They can be customized with vision panels, louvers, hardware, and finishes to suit specific project needs.

ENGINEERING HIGHLIGHTS
SMART CONTROL SYSTEM
CUSTOMIZATION OPTIONS

Door Type	Hollow metal fire-rated door assembly, engineered with reinforced steel sheets and mineral core infill for fire resistance and structural integrity.
Primary Application	Commercial complexes, industrial facilities, data centers, educational institutions, healthcare buildings, stairwells, and fire escape routes requiring certified fire protection.
Fire Rating	Available in 30, 60, 90, 120, and up to 240 minutes of certified fire resistance as per international testing standards (IS/BS/EN/UL).
Maximum Clear Opening	Single leaf up to 1,200 mm × 2,400 mm; double leaf up to 2,400 mm × 2,400 mm (custom sizes available on request).
Leaf Construction	1.0–1.5 mm thick galvanised or cold rolled steel sheets with lock-formed edges; mineral wool or proprietary fire-resistant infill core.
Frame Construction	Pressed steel frames (1.6–2.0 mm) with single/double rebate profile, reinforced for hardware anchorage, factory primed or powder coated.
Glazing Options	Fire-rated glass vision panels available (clear or wired) tested to matching fire ratings; ceramic or gel-filled glass types on request.
Compliance & Standards	Tested and certified as per BS 476 Part 22 / IS 3614 / EN 1634 / UL 10C, with third-party certification.

Operation Type	Primarily manual swing operation with self-closing mechanism; motorised option available for special projects.
Door Hardware	UL-listed or CE-marked hinges, mortise locks, latch bolts, flush bolts (for double doors), and closers rated for fire doors.
Closing Mechanism	Heavy-duty spring or hydraulic door closers with adjustable speed control to ensure reliable self-closing.
User Controls	Manual lever handles or panic bars (push bars) for quick egress; optional access control integration (RFID, card readers).
Safety Systems	Integrated intumescent seals that expand under heat to prevent smoke and flame spread; fire-rated vision panels with ceramic glazing.
Emergency & Backup	Always functional in case of power failure; panic hardware ensures fast and safe exit during emergencies.
Integration	Compatible with fire alarm systems, electromagnetic hold-open devices, and building management systems.

Door Leaf Finish	Factory-primed or polyester powder-coated finish in standard RAL shades; stainless steel finish optional for high-hygiene areas.
Frame Finish	Powder-coated in matching or contrasting colours; hot-dip galvanised coating available for enhanced corrosion resistance.
Infill Core	High-density mineral wool, ceramic-based board, glasswool, rockwool, or honeycomb, proprietary fire-resistant core depending on rating requirement.
Vision Panels	Optional fire-rated glass (wired, ceramic, or gel-filled) with tested integrity and insulation performance.
Sealing Packages	Intumescent strips, smoke seals, and acoustic drop seals available for improved fire, smoke, and sound insulation.
Branding	Custom colours, corporate logo embossing, and stainless-steel kick plates for heavy-traffic zones.
Accessories	Options include door viewers, push/pull plates, kick guards, automatic flush bolts, and hold-open devices.