This subclause stipulates that the D1.1 code contains requirements for fabricating and erecting welded steel structures. When a contract specifies use of the code, all of its provisions are mandatory unless the contract documents or the Engineer modifies or exempts them.

AWS D1.1/D1.1M:2020 is divided into 11 individual clauses. Below is a general description of the information that each clause contains.

Clause 1 - General Requirements: Basic information on the scope and limitations of the code, key definitions, and the major responsibilities of the parties involved in steel fabrication.

Clause 2 - Normative References: A list of reference documents that assist in implementation of the code.

Clause 3 - Terms and Definitions: Terms and definitions relating to this code.

Clause 4 - Design of Welded Connections: Requirements for designing welded connections composed of tubular or nontubular product form members.

Clause 5 - Prequalification of WPSs: Requirements for exempting a Welding Procedure Specification (WPS) from this code’s qualification testing requirements.

Clause 6 - Qualification: Requirements for the qualification of welding procedures and the welding personnel necessary to perform work to code requirements.

Clause 7 - Fabrication: Requirements for base metals, welding consumables, welding technique, welded details, material preparation and assembly, workmanship, weld repair, and other requirements for fabrication and erection of welded steel structures.

Clause 8 - Inspection: Criteria for qualifications and responsibilities of welding inspectors, acceptance criteria for production welds, procedures for visual inspection, RT, UT, and other NDT requirements.

Clause 9 - Stud Welding: Requirements for the welding of studs to structural steel.

Clause 10 - Tubular Structures: Exclusive tubular requirements. Additionally, the requirements of all other clauses apply to tubulars, unless specifically noted otherwise.

Clause 11 - Strengthening and Repair of Existing Structures: Provisions for welded modification or repair of existing steel structures.