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70SD–55 Series

Innovating Architecture, Enhancing Environments

The 70SD–55 Series offers ultra-large fire and non-fire steel doors through a durable, high-performance profile system. Its cold-formed steel frame, developed by our partner Profile Design Aspirer (PDA), integrates seamlessly with premium glass and hardware to create a refined, complete solution.

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Strong, Insulated, Multifunctional Steel Frames

  • Sleek 70 mm cold-rolled steel frames for a clean, modern look without sacrificing strength

  • High-strength steel construction delivers long-term durability and peace of mind

  • Glass-fiber polyurethane insulation helps keep indoor temperatures comfortable while improving energy efficiency

  • Three-cavity design reduces heat transfer, supporting better insulation and year-round comfort

70SD–55 Series

  • 55 mm internal cavity allows for better insulation and a stronger, more stable door

  • Fire-resistant design adds an extra layer of safety and peace of mind

  • Built to support ultra-tall, large doors, making it ideal for grand entrances and wide openings

  • Thermally broken, energy-saving profiles help maintain comfortable indoor temperatures even with oversized doors

Explore the Collection

Swing Door

Spring Door

Center-Pivot Door

    • Galvanized Cold-Formed Steel

    • Fiberglass-Reinforced Polyurethane Insulation

    • Fluorocarbon Coating

    • Stainless Steel

    • Copper Plating Wire Drawing

  • Swing Door – Non-Fire-Rated, Inward/Outward Hinged

    Single door
    Max: W 1500 × H 3200 mm (59 × 125 in)
    Min: W 500 × H 1800 mm (19 × 70 in)

    Double door
    Max: W 3000 × H 3200 mm (118 × 125 in)
    Min: W 1000 × H 1800 mm (39 × 70 in)

    Swing Door – Fire-Rated, Outward-Opening

    Single door
    Max: W 1100 × H 2800 mm (43 × 110 in)
    Min: W 500 × H 1800 mm (19 × 70 in)

    Double door
    Max: W 2100 × H 2800 mm (82 × 110 in)
    Min: W 1000 × H 1800 mm (39 × 70 in)

    Spring Door – Floor-Sprung

    Single door
    Max: W 1800 × H 3800 mm (70 × 149 in)
    Min: W 500 × H 1800 mm (19 × 70 in)

    Double door
    Max: W 3600 × H 3800 mm (141 × 149 in)
    Min: W 1000 × H 1800 mm (39 × 70 in)

    Center-Pivot Door

    Single door
    Max: W 2500 × H 4500 mm (98 × 177 in)
    Min: W 500 × H 1800 mm (19 × 70 in)

    Double door
    Max: W 5000 × H 4500 mm (196 × 177 in)
    Min: W 1000 × H 1800 mm (39 × 70 in)

  • A variety of windows, doors, and partitions can be seamlessly combined to achieve your desired layout. Get in touch for more information.

    • Steel hinges for welding or concealed hinge

    • Steel glazing beads(indoor)

    • Multipoint locks (motorized also available)

    • Emergency locks and panic push-bars

    • The three-cavity structure design can achieve a better heat insulation effect

    • K (f) of the 7055 steel profiles is 1.6W/(㎡·K)

    • 70mm thickness

    • The 7055 profile wall thickness is 1.5mm

    • It can be matched with all kinds of standard hardware.

    • Steel hinges for welding or concealed hinge

    • Connection to a solid wall or lightweight partition wall