MTS50 Thermally Broken Steel

Bright corner workspace featuring a sleek white desk, a grey chair, and large steel-framed windows with textured glass, surrounded by light brick walls.

MTS50 Solid Cold Formed Thermally Broken Steel

The MTS50 Profile represents a new generation of steel framing that combines structural integrity with advanced thermal performance. Using precision cold-forming technology, each section is designed to maintain the timeless aesthetic of solid steel while delivering exceptional insulation and energy efficiency for modern architecture.

Built with a high-performance thermal break system, the MTS50 minimises heat transfer between interior and exterior environments, improving comfort and reducing energy costs throughout the year.

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Enduring Form. Enhanced Efficiency.

Premium Swiss-engineered cold-formed thermally broken steel profiles by Ottostumm.
Distinctive stepped-leg profile design for refined architectural detailing.
Integrated high-density cast-in polyurethane thermal isolator for enhanced thermal efficiency.
Compact profile dimensions delivering minimal sightlines while maintaining superior insulation performance.
Accommodates Low-E double glazing up to 37mm thick.
Selection of glazing bead profiles to complement different architectural styles.
Suitable for internal and external steel doors and window applications.
Our highest-performing thermally insulated steel profile system, combining exceptional thermal efficiency with refined architectural aesthetics.

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MTS50 Inside View

Thermally broken steel window cross-section showcasing sleek black frame and multi-layered glass for enhanced insulation.

MTS50 Outside View

MAXIMUM SIZES	MTS50 Solid Steel
DOOR / WINDOW TYPE	HEIGHT (mm)	WIDTH (mm)
*Fixed Window	*5500	*5500
Awning Window	2400	900
Casement Window	2450	900
*Hinge Door	*2450	900
Internal Cavity/Barn Sliding Door	NA	NA
Pivot Doors	NA	NA
External Lift & Slide Sliding Door	3000	1200
Bifold Door	2450	1200

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*Larger Fixed Windows will generally be separated into multiple sections and may need to be glazed on site depending on the overall size. Details will always be confirmed on our CAD shop drawings.
*MTS50 doors exceeding 2450mm in height, SWF multipoint locking systems are required for external applications, while magnetic catches will be incorporated for internal applications.
Awning Windows are recommended for windows smaller than 1.2 sqm
Single Glazed Door Weight: 20kg-30kg per sqm depending on design
Double Glazed Door Weight: 40-50kg per sqm depending on design

Detailed technical drawing of the MTS50 thermally broken steel profiles, showcasing dimensions and design specifications in black on a white background.

Thermally broken steel door designs showcasing arched tops, multiple glass panes, and detailed measurements for custom specifications.

Each profile is a testament to advanced engineering, seamlessly combining superior insulation, structural strength, and elegant form to redefine the performance and beauty of modern steel doors and windows.

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Arch-shaped steel door with a central vertical handle, featuring a sleek, minimalist design in a dark finish against a light background.

Bespoke arched steel door with a sleek black frame, featuring large glass panels and a modern handle, partially open.

1Lite Arch

Modern rectangular steel door with a minimalist design, featuring a dark frame and a central handle against a grey panel.

Bespoke black steel double door partially open, featuring large glass panels and simple handles, showcasing modern design.

1Lite Square

Arched black steel window with a central crossbar, featuring clear glass panes, emphasising minimalist elegance and craftsmanship.

Arched black steel door with a glass panel, featuring a sleek design and open wing, showcasing modern architectural elegance.

2Lite Arch

Black steel-framed window featuring an arched design with a central vertical bar, showcasing a minimalist aesthetic and ample glass area.

Bespoke steel door design featuring a large arch frame with a partially open door, showcasing sleek lines and a minimalist aesthetic.

3Lite Arch

A sleek black steel-framed door featuring three square glass panels arranged vertically, with two central handles.

Bespoke black steel door with three vertical glass panels, partially open, illustrating modern design and craftsmanship.

3Lite Square

Arched steel-framed window featuring a four-lite design and a central handle, with a textured grey background.

Arch-shaped black steel door with glass panels, featuring a side panel design and sleek handles, showcasing a modern aesthetic.

4Lite Arch

Bespoke black steel-framed window with four panels, featuring a central handle and a sleek, minimalist design.

Bespoke steel door design featuring a black frame with four square glass panels, illustrating a modern open layout.

4Lite Square

Arched steel door with five rectangular glass panes, framed in dark steel, featuring sleek black handles.

Arched steel door in black frame with five glass panels, one door partially open, showcasing a modern design aesthetic.

5Lite Arch

Arched steel window featuring six panes, a central vertical divider, and a sleek handle, finished in a dark, elegant colour.

Arched steel door design with a minimalist layout, featuring a black frame and glass panels, partially open to showcase the entryway.

6Lite Arch

Explore our range of custom steel door designs, built for strength, security, and everyday performance. Each design is manufactured in-house with precise detailing, durable finishes, and solid construction, delivering reliable protection without compromising style.

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