Triangle Steel is a proud member of the following organizations:
- Alberta Construction Association
- Calgary Construction Association Confederation of Independent Business
- Calgary Steel Fabricators Association
- Canadian Construction Association
- Canadian Institute of Steel Construction
- Canadian Welding Bureau
- International Association of Bridge, Structural and Ornamental Iron Workers – Local 725
- Metal Fabricators Health & Safety Association
- United Steelworkers of America – Local 6034
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