Structural design documents and specifications shall indicate the work to be performed, and include items required by the Specification, the AISC Code of Standard Practice for Steel Buildings and Bridges, the applicable building code, and this section, as applicable.
A4.1 General
The structural design documents and specifications shall indicate the following general items, as applicable:
- (a) Designation of the seismic force-resisting system (SFRS)
- (b) Identification of the members and connections that are part of the SFRS
- (c) Connection details between concrete floor diaphragms and the structural steel elements of the SFRS
- (d) Fabrication documents and erection document requirements not addressed in Section II
A4.2 Steel Construction
The structural design documents and specifications shall include the following items pertaining to steel construction, as applicable:
- (a) Configuration of the connections
- (b) Connection material specifications and sizes
- (c) Locations where gusset plates are to be detailed to accommodate inelastic rotation
- (d) Locations of connection plates requiring Charpy V-notch toughness in accordance with Section A3.3(b)
- (e) Locations of stability bracing members
- (f) Lowest anticipated service temperature of the steel structure, if the structure is not enclosed and maintained at a temperature of 50°F (10°C) or higher
- (g) Locations and dimensions of protected zones
- (h) Connection detailing
The structural design documents and specifications shall include the following items pertaining to elements of connection details, as applicable:
- (1) Locations of demand critical welds
- (2) Locations where weld backing is required to be removed and where fillet welds are required after backing is removed
- (3) Locations where fillet welds are required when weld backing is permitted to remain
- (4) Locations where weld tabs are required to be removed
- (5) Locations where tapered splices are required
- (6) The shape of weld access holes, if a shape other than those provided for in the Specification is required, and location of weld access holes
User Note: These Provisions and ANSI/AISC 358 include requirements related to protected zones, demand critical welds, removal of weld backing and repair after backing is removed, fillet welding of weld backing, weld tab removal, tapered transitions at splices, and special weld access hole geometry. These explicit requirements are considered adequate and effective for the great majority of steel structures and are strongly encouraged to be used without modification. There may be special or unique conditions where supplemental requirements are deemed to be necessary by the engineer of record. In such cases, these project-specific requirements must also be clearly delineated in the structural design documents.
A4.3 Composite Construction
For the steel components of reinforced concrete or composite elements, structural design documents and specifications for composite construction shall indicate the following items, as applicable:
- (a) Bar placement, cutoffs, lap and mechanical splices, hooks and mechanical anchorage, placement of ties, and other transverse reinforcement
- (b) Requirements for dimensional changes resulting from temperature changes, creep, and shrinkage
- (c) Location, magnitude, and sequencing of any prestressing or post-tensioning present
- (d) Location of steel headed stud anchors and welded reinforcing bar anchors