CWB Certification: What It Means When You’re Hiring a Steel Fabricator

If you're comparing quotes from metal fabricators for a Hamilton project, "CWB certified" will show up in most of them — but it's worth knowing what it actually guarantees before you take it on faith.

What CWB Certification Is

The Canadian Welding Bureau (CWB) certifies both individual welders and fabrication shops to specific standards. W47.1 covers carbon steel and stainless steel welding; W47.2 covers aluminum. Certification requires passing welding procedure qualification tests and is maintained through ongoing audits and re-testing — it's not a one-time credential that sits on a wall forever.

Why It Matters for Your Project

Most municipal building departments, including Hamilton's, require CWB-certified welding on structural steel before they'll sign off on an inspection. If your fabricator isn't certified, you risk a failed inspection after the steel is already installed — an expensive and disruptive problem to discover late.

Questions Worth Asking a Fabricator

• Is the shop itself CWB certified, not just individual welders?
• Which standard — W47.1, W47.2, or both — and does it match your material (carbon steel, stainless, aluminum)?
• Can they provide certified shop drawings from a retained engineer, or only field-welded connections without engineering review?

A fabricator who can answer all three without hesitation has the paperwork to back up the claim — and the inspection history to prove it.