Steel structure manufacturer since 2009 · 8 fabrication bases in China
EN 1090-1 and EN 1090-2 for steel structures: execution classes EXC1–EXC4, factory production control, CE marking and supplier checks.
ISO 3834 parts 2, 3 and 4 for welding quality management, how they relate to EN 1090, and what to ask a fabricator.
Q235B, Q355B, Q390 and Q420 compared with ASTM A36, A572 and A992, EN S235 to S420 and AS/NZS grades: yield strength, impact tests and when substitution needs approval.
AS/NZS 5131 for fabrication and erection of structural steel in Australia and New Zealand: construction categories CC1–CC4 and supplier requirements.
The difference between EN 10204 inspection document types 2.1, 2.2, 3.1 and 3.2, which one structural steel needs, and how to trace it to members.
AISC 360 design, AISC 303 Code of Standard Practice and AWS D1.1 welding: what a US-specified steel project expects from an overseas fabricator.