An extension of your engineering office — for facades, glass roofs and one-off special components.
21 Structures specializes in the structural design of steel-and-glass constructions. We work as an extension of engineering offices: when a project calls for a facade, a glass roof or a one-off special component, we deliver the calculation — and, on request, fabrication-ready shop drawings.
We work to the standard your project requires — Eurocode, DIN, AISC or other international codes. We value precise communication, agreed deadlines and confidentiality. NDAs are standard practice for us.
Mats Keller, B.Eng. — Founder & Structural Engineer
Specializing in the structural design of steel-and-glass constructions, facades and natural stone facades since 2019.
Safe, durable, buildable designs — calculations your checking engineer can follow line by line.
We work as part of your team, not around it. Your client stays your client.
Code-compliant, fabrication-ready, delivered on the agreed date.
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