Dark Gray Staircase Fire-Rated Metal Door

NEXA Fire-Rated Stairwell Steel Door – Dark Gray (RAL 7015) | Certified Safety with Elegant Industrial Design

The NEXA Dark Gray Fire-Rated Steel Door combines modern aesthetics, technical precision, and certified fire protection for residential, commercial, and industrial applications.
This model is officially approved by the Fire Department, featuring 240 minutes of fire resistance, Efectis Turkey laboratory test reports, and technical certification from the Building & Housing Research Center (BHRC) of Iran.

Engineered for universal use, it can be installed in multi-story parking structures, hospitals, office complexes, commercial centers, and residential towers — with no limitation on project type or building height.

Both the handle and panic bar colors are customizable. The door’s standard color, RAL 7015 (Slate Gray with a subtle blue undertone), adds a sleek and refined appearance suitable for architectural stairwells and escape routes.

Body and Frame Structure

Door Leaf:

• Made of galvanized steel sheet, thickness 1.0 mm

• Reinforced with integrated mechanical joints for superior structural strength

Frame:

• Constructed from galvanized steel sheet, thickness 1.25 mm

• Fully welded structure for long-term stability and endurance

Core Insulation:

• IzoCell 505 advanced nano-engineered fire insulation with cellular structure

• Uses SABIC thixotropic fire-retardant resin

• Internal steel reinforcement frame ensures torsional resistance and rigidity

• Lateral reinforcement beams prevent deformation at hinge zones

• Double steel plates behind handle, panic bar, and hinge mounts enhance fastening strength

Hinges and Connections

• Equipped with three heavy-duty, triple-joint cylindrical steel hinges, designed for fireproof and safe applications

• Fully welded connections for maximum mechanical stability

• Reinforced hinge areas for impact and load resistance

Surface Preparation and Paint Coating

Before painting, all steel parts undergo:

• Grinding, degreasing, and acid washing to improve coating adhesion and corrosion protection

Paint System:

• Electrostatic powder coating, oven-baked under standard curing temperature

• 80-micron uniform coating, applied using conveyor (rail) technology for even finish

• Resistant to scratches, corrosion, and UV exposure

• Available in custom RAL colors based on client preference

Fire and Smoke Sealing

• Certified intumescent fire and smoke seals, expanding up to 500% under heat

• Provides complete smoke and flame isolation during fire events

• Integrated one-piece steel fire-rated threshold with smoke barrier

Door Closer

• Two-speed hydraulic overhead door closer (China-made)

• Dual adjustment valves provide separate control for opening and closing speeds

• Ensures smooth, controlled, and silent operation

Additional Features

• Eight decorative plastic caps used to conceal mounting holes for a refined look

• Symmetrical design, allowing both left- and right-hand opening with the same door body

• All hardware components (hinges, locks, and handles) are bi-directional, simplifying installation and operation