EN 1090 sorts steel structures into four execution classes. The class sets how much inspection, documentation and welder qualification the work needs.
Crane girders, press frames and anything that carries a moving load usually lands in EXC3. That means qualified procedures, coded welders, a responsible welding coordinator and more non-destructive testing.
We fabricate everything to EXC3 by default. It costs little extra on heavy work and nobody has to re-qualify a part later.
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