AISC 360 and AISC 303: what US-spec projects require of a fabricator
Steel Grades & Standards

AISC 360 and AISC 303: what US-spec projects require of a fabricator

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.
GGSteel Engineering · Updated noviembre 2026

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US-specified steel projects reference AISC 360 for design, AISC 303 for standard practice between owner, designer and fabricator, and AWS D1.1 for welding.

What each document covers

DocumentoCovers
AISC 360Design of structural steel buildings
AISC 303Responsibilities, tolerances, shop drawing approval, what is included in “structural steel”
AWS D1.1Welding procedures, qualification, inspection
ASTM A6 / A992 / A572Material and section requirements

Qué verificar

  • Welding procedures qualified to AWS D1.1
  • Mill certificates to ASTM grades, or approved equivalents
  • AISC 303 tolerances applied in the ITP

Note on GGSteel status: GGSteel certification status for this standard to be confirmed. We fabricate to its requirements when your specification calls for it.

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