Mirror-Polished Stainless Steel T-Sections for the Sberbank Corporate University Facade in Moscow
Sberbank, Russia’s oldest state bank, built a new 32,000 m² Corporate University near Moscow to host training, seminars, and management development programmes. The complex was designed by Dutch architect Erick van Egeraat with wood and glass cladding, and required stainless steel mullions as the structural elements of the facade. The specified profile was a sharp-edged T-section in stainless steel 304L, a geometry that combined structural efficiency with a minimal visual footprint. To match the high-end architectural intent, the profiles needed a mirror-polished finish across all visible faces. Montanstahl manufactured and delivered 650 bars totalling 45 tonnes, meeting both the dimensional tolerances and the surface quality standard of a permanently exposed architectural facade.
Why a T-Section and Why Mirror-Polished
A T-section offers a structurally efficient mullion geometry for glass facade systems: the web provides the depth needed to resist bending loads, while the flange provides the bearing surface against the glass without requiring a wide visible frame. For an architect like Erick van Egeraat, who uses reflective and transparent surfaces to create a sense of light and space, a mirror-polished finish on the stainless steel mullions was not an aesthetic option but a functional part of the design language. The mirror finish makes the structural member partially disappear in reflections of the surrounding environment, reducing the visual weight of the facade frame. Achieving that finish on a precision fabricated structural section at batch scale is where the technical challenge lies.
Pre-Polished Before Welding, Protected Throughout, Mirror Finished Before Shipping
Montanstahl produced the T-sections by laser fusing precision-cut 304L plates. The visible faces were pre-polished in Germany before the welding stage, a sequencing decision that protects the surface from contamination introduced during fabrication. Production equipment was adapted throughout to avoid contact damage on the polished surfaces. Final mirror polishing was applied to the completed sections before shipping, with protective packaging specified to preserve the finish through transport to Moscow. The 650 bars were delivered on time and met the strict dimensional tolerances and surface quality requirements of a permanently exposed architectural installation at this scale.
Application Context
This project is part of Montanstahl’s architecture, building and construction segment, where laser welded special profiles with polished finishes are specified for architecturally exposed facade applications. Sharp-edged T-sections and other custom profiles in mirror or brushed finish stainless steel are produced for curtain walls, structural glazing systems, and facade cladding where the profile is permanently on display and the surface quality is part of the design specification. Montanstahl supplies profiles of this type to architectural projects across Europe, Russia, and worldwide.