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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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Close-up of a door latch with a keypad sensor in a trade show, with people and glass doors in the background.
Close-up of a steel-framed pivot door featuring a brass-colored track.
A trade show booth with glass walls, labeled 'MEDA' at the top left corner and 'Zero-Gravity' on the right side, with people inside and outside the booth.
Modern office space with glass walls, open door, and minimalist furniture, including a large circular decorative piece on the wall.
Entrance with steel-framed double doors leading into a trade show or convention center with booths, displays, and people inside.
View of steel double door and window frame in a commercial space with a street scene outside, including signs and people walking.
Close-up of a steel door with a silver handle, showing reflections of the building's interior and exterior, including a staircase and outdoor area with buildings and trees.
Modern building exterior with textured stone walls, glass doors, and horizontal wood and metal slats on the awning.
Modern office building entrance with glass doors and windows.
Modern building with large glass windows, multiple entrances, and canopy over the doors, with trees and buildings reflected in the glass.
Modern building with large glass windows and a glass door entrance.
Glass double doors with a metal frame, flanked by glass panels, leading into a modern building interior.
A glass door reflecting a cozy indoor waiting area with a purple sofa and a piece of abstract wall art.
Close-up of a modern door lock mechanism with a cylindrical handle, keyhole, and metal frame, set against a plain background.

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

Gray metal door with a window in the center and a handle on the right side.

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

A line art illustration of an opened double swing door.

Swing Door

A line art illustration of an opened single panel swing door.

Spring Door

A line art illustration of an opened center pivot door.

Center-Pivot Door

An illustration of an open electrical panel door with a lightning bolt symbol, revealing a blank interior.

Electric 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