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Steel Frame Glass Bifold Doors – Galvanised W40 Profile

Zen Doors & Windows
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Custom-made steel frame glass bifold doors crafted from robust W40 solid hot-rolled Swiss steel. Featuring slim sightlines, flexible glazing and finish options, and suitability for internal or external applications

Details
Specifications
  • Door Design: Custom
    • Door Type: Bifold Doors
    • Location: External or Internal
    • Hinges: 3 or 4 Heavy Duty Welded, Lift-off, 180-degree hinges with brass washers
    • Mounting Type: Tabs Outside of Jamb, Pre-Drilled Mounting Holes Inside of Jamb – visit our Mounting Types page for more options
    • Door Jamb & Sash: 55mm x 67mm (Overall)
    • Open way (entering): In-Swing or Out-Swing
    • Sill/Threshold: 25mm x 150mm Forward Sloping or Square
    • Door Bottom Rubber Seal: Optional
    • Glass Type: Visit our Glazing options page
    • Glass Thickness: Visit our Glazing options page
    • TDL: 20T or 30T
    • Beads: CTL 10, CTL15, CTM20, CTM30
    • Colour Finish: Visit our Paint Finishes page
    • Lever Handles: Visit our Pittella page
    • Pull Handles: Visit our Custom Pull Handles page
    • Locks: Visit our Pittella page
    • Flushbolts: Included
    • Material: Solid Hot Rolled Swiss Ottostumm W40 Steel Profile
      Stepped leg design, material thickness up to 5mm – Very compact profiles with minimal depth and sight-lines
      Appropriate for heavy-duty corrosion protection
    • Surface treatment: Zinc-magnesium pre-coating for corrosion protection
      Gritblasting SA 2.5; The 1st layer is a sealing primer; The 2nd layer is a high-durable top coating; Total thickness is at least 150-180 microns according to VMRG quality requirements.
    • Paint: 4FC (Fluorocarbon) (DAIKIN of Japan)
    • Package: Sealed Wooden Box
    • CAD Design Drawing: Yes
Features
  • Modern Architectural Design
  • Custom Handmade Construction for Durable Functionality
  • Built from High-Quality Galvanised Solid Hot Rolled W40 Profile
  • Fluorocarbon Coating, a superior finish to Powder coating
  • Single, Double or Triple Glazing Available
  • High Quality Door Hardware
  • Designed to Impress and Built to Last
  • 10 Year Warranty – Must comply with our installation requirements.
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About the
Seller

Zen Doors & Windows design and manufacture bespoke architectural steel door and window systems for residential and commercial projects where cohesion, performance, and design integrity matter.

Our range spans iron entry doors, steel-framed glass doors, and steel windows, all custom-designed and handcrafted from precision-engineered steel profiles. Select Zen designs are also available in curated standard sizes, offering shorter lead times while maintaining the same material quality and detailing.

We don’t produce off-the-shelf solutions. We collaborate with homeowners, architects, interior designers, builders, and developers to deliver fully integrated steel systems that define spaces, enhance proportions, and elevate the entire project.

Whether it’s a single statement entry or a home or commercial development wrapped in steel, Zen creates continuity, character, and a point of difference that carries through every elevation and interior space.

Because true luxury isn’t one feature — it’s consistency, intent, and execution.

Verified ArchiPro Member3 years · Since 2023