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Window Systems - T42 TB | OTTOSTUMM | MOGS
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Window Systems - T42 TB | OTTOSTUMM | MOGS

  • Use

    Exterior fenestration systems
  • Applications

    19th/20th-century renovation, residential, commercial, institutional
  • Characteristics

    Thermally enhanced, 42mm sightline, T-shaped mullions, accommodates double and triple glazing
  • Sizes

    Profile depth: 80, 100, 120, 140 mm | Web thickness: 10 mm
  • Certification

    Recognized by Green Guide

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More about this product

OTTOSTUMM supplies components for steel fenestration systems. in the first half of the 20th century, solid T-shaped mullions and transoms were common solutions to manufacture curtain walls in commercial buildings or to support the long runs of clerestory windows in factories. T42 TB is a thermally enhanced system inspired by those classical solutions available in steel, cor-ten steel, and stainless steel.

Unlike conventional façade profiles, the T-shaped mullions integrate the thermal barrier directly into the profile achieving a very high thermal insulation with a sightline of only 42mm. The system follows the concept of partitioning systems and doesn't require special glass fixings components as in conventional façades. The T shape aesthetics makes it ideal for restoration as well as for new cutting-edge architecture.



  1. Steel, Cor-Ten and stainless steel
  2. Laser welded profiles with integrated thermal barrier
  3. External flange 6 mm thickness
  4. System with external perimetral sealing
  5. Accommodates double and triple glazing
  6. Thermal barrier in polyamide PA 6.6
  7. Choice of different angular glazing beads
  8. Profile depth of 80, 100, 120, 140 mm
  9. Web thickness 10 mm


The steel bil­lets, rods and strips, from which OTTOSTUMM steel window profiles are formed, are smelted from almost 100% recycled steel scrap. At the end of their life, steel windows can be systematically dis­mantled and the frames, fittings, and glass recycled.

Contact manufacturer


Contact manufacturer

Contact manufacturer


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