![The sculptural weathered steel facade of the building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-01.jpg)
TCHOBAN VOSS Architekten has completed a new office building in Saint Petersburg, Russia, that appears to be woven with weathered steel.
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-02.jpg)
The sculptural weathered steel facade of the building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose “warp and weft” threads.
![](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-03.jpg)
The three-dimensional stripes span the rectangular building both horizontally and vertically, while the alternation of flat and protruding modules creates the illusion of woven threads.
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-04.jpg)
When the building is viewed from the side, the horizontal lines at the intersections of the strips appear to thread behind the vertical lines and vice versa.
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-05.jpg)
The name of the office building “Ferrum”, which is Latin for iron, is a reference to the material structuring the facade and a reference to the history of the former industrial site on which the new building was erected.
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-06.jpg)
When discussing why they chose weathered steel for the exterior material, the architects mention, “This corrosion-resistant and extremely durable building material with its characteristic rust-red patina and velvety texture gives the building a particularly striking, expressive appearance.”
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-07.jpg)
Over time, the weathering steel will change color as it’s exposed to the elements.
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-08.jpg)
Here are a few close-up looks at the weathering steel details that cover the building.
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-09.jpg)
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-10.jpg)
![The sculptural weathered steel facade of this modern office building is constructed in a geometric grid and presents itself as a dynamic, organically flowing fabric of loose "warp and weft" threads.](https://www.contemporist.com/wp-content/uploads/2021/08/modern-office-building-weathered-steel-woven-exerior-180821-1102-11.jpg)