A4Structural design documents and specifications

Structural design documents and specifications issued for construction of all or a portion of the work shall be clearly legible and drawn to an identified scale that is appropriate to clearly convey the information.

A4.1 Structural Design Documents and Specifications Issued for Construction

Structural design documents and specifications shall be based on the consideration of the design loads, forces, and deformations to be resisted by the structural frame in the completed project and give the following information, as applicable, to define the scope of the work to be fabricated and erected:

• (a) Information as required by the applicable building code

• (b) Statement of the method of design used: LRFD or ASD

• (c) The section, size, material grade, and location of all members

• (d) All geometry and work points necessary for layout

• (e) Column base, floor, and roof elevation

• (f) Column centers and offsets

• (g) Identification of the lateral force-resisting system and connecting diaphragm elements that provide for lateral strength and stability in the completed structure

• (h) Design provisions for initial imperfections, if different than specified in Chapter C for stability design

• (i) Fabrication and erection tolerances not included in or different from the Code of Standard Practice

• (j) Any special erection conditions or other considerations that are required by the design concept, such as identification of a condition when the structural steel frame in the fully erected and fully connected state requires interaction with nonstructural steel elements for strength or stability, the use of shores, jacks, or loads that must be adjusted as erection progresses to set or maintain camber, position within specified tolerances, or prestress

• (k) Preset elevation requirements, if any, at free ends of cantilevered members relative to their fixed-end elevations

• (1) Column differential shortening information, including performance requirements for monitoring and adjusting for column differential shortening

• (m) Requirements for all connections and member reinforcement

• (n) Joining requirements between elements of built-up members

• (o) Camber requirements for members, including magnitude, direction, and location

• (p) Requirements for material grade, size, capacity, and detailing of steel headed stud anchors as specified in Chapter I

• (q) Anticipated deflections and the associated loading conditions for major structural elements (such as transfer girders and trusses) that support columns and hangers

• (r) Requirements for openings in structural steel members for other trades

• (s) Shop painting and surface preparation requirements as required for the design of bolted connections

• (t) Requirements for approval documents in addition to what is specified in the Code of Standard Practice Section 4

• (u) Charpy V-notch toughness (CVN) requirements for rolled heavy shapes or built-up heavy shapes, if different than what is required in Section A3

• (v) Identification of members and joints subjected to fatigue

• (w) Identification of members and joints requiring nondestructive testing in addition to what is required in Chapter N

• (x) Additional project requirements, as deemed appropriate by the engineer of record (EOR), that impact the life safety of the structure

User Note: According to the Code of Standard Practice Section 3, it is permitted in the structural design documents and specifications to refer to architectural, electrical, and/or mechanical design documents for some information as required in this section.

When structural steel connection design is delegated, the design documents and specifications shall include the following:

• (a) Design requirements for the delegated design
• (b) Requirements for substantiating connection information

User Note: For projects that require consideration of seismic provisions, additional requirements for information to be shown on the structural design documents and specifications are contained in Section A4 of the AISC Seismic Provisions for Structural Steel Buildings. For safety-related steel structures for nuclear facilities, additional requirements for information to be shown are contained in ANSI/AISC N690, Section NA4.

User Note: The intent of the information required to be shown on design documents issued for construction as identified in Section A4 is to ensure that these items are documented and addressed by the EOR prior to construction. Some information may be contained in deferred submittals prepared by a specialty structural engineer and approved by the registered design professional in responsible charge. Additional information regarding design documents and submittals pertaining to metal buildings and steel joists can be found in the Common Industry Practices published by the Metal Building Manufacturers Association (MBMA) and the Code of Standard Practice for Steel Joists and Joist Girders published by the Steel Joist Institute (SJI), respectively. Steel (open-web) joists and steel joist girders are not structural steel per the Code of Standard Practice Section 2.2 and therefore fall outside the scope of this Specification.

A4.2 Structural Design Documents and Specifications Issued for Any Purpose

Structural design documents and specifications shall be clearly identified by the EOR with the intended purpose and date of issuance before being released by any party for the purpose of bidding or as the basis for a contract.

User Note: The terminology now used in this Specification and the Code of Standard Practice is that structural design documents and specifications are

“issued” by the EOR for a designated purpose as shown in the documents and “released” by any other party to a contract (e.g., owner, general contractor, con- struction manager, etc.). The documents that are released must be labeled with the EOR’s purpose and date of issuance.