AISC 303-10 Code of Standard Practice
for Steel Buildings
and Bridges
April 14, 2010 Supersedes the March 18, 2005 AISC Code of Standard Practice
for Steel Buildings and Bridges and all previous versions.
Prepared by the American Institute of Steel Construction                              under the direction of the AISC Committee
on the Code of Standard Practice.
AMERICAN INSTITUTE OF STEEL CONSTRUCTION
One East Wacker Drive, Suite 700, Chicago, Illinois 60601
16.3-ii
AISC © 2010
by
American Institute of Steel Construction
All rights reserved. This book or any part thereof must not be reproduced in any form without the written permission of the publisher. The AISC logo is a registered trademark of AISC.
The information presented in this publication has been prepared in accordance with recognized engineering principles and is for general information only. While it is believed to be accurate, this information should not be used or relied upon for any specific application without competent professional examination and verification of its accuracy, suitability, and applicability by a licensed professional engineer, designer, or architect. The publication of the material contained herein is not int
ended as a representation or warranty on the part of the American Institute of Steel Construction or of any other person named herein, that this information is suitable for any general or particular use or of freedom from infringement of any patent or patents. Anyone making use of this information assumes all liability arising from such use.
Caution must be exercised when relying upon other specifications and codes developed by other bodies and incorporated by reference herein since such material may be modified or amended from time to time subsequent to the printing of this edition. The Institute bears no responsibility for such material other than to refer to it and incorporate it by reference at the time of the initial publication of this edition.
Printed in the United States of America
Code of Standard Practice for Steel Buildings and Bridges, April 14, 2010
AMERICAN INSTITUTE OF STEEL CONSTRUCTION
Code of Standard Practice for Steel Buildings and Bridges, April 14, 2010 AMERICAN INSTITUTE OF STEEL CONSTRUCTION 16.3-iii
PREFACE
As in any industry, trade practices have developed among those that are involved in the design, purchase, fabrication and erection of structural steel. This Code provides a useful framework for a common understanding of the acceptable standards when contracting for structural steel. As such, it is useful for owners, architects, engineers, general contractors, construction managers, fabricators, steel detailers, erectors and others that are associated with construction in structural steel. Unless specific provisions to the contrary are contained in the contract documents, the existing trade practices that are contained herein are considered to be the standard custom and usage of the industry and are thereby incorporated into the relationships between the parties to a contract.
The Symbols and Glossary are an integral part of this Code. In many sections of this Code, a non-mandatory Commentary has been prepared to provide background and further explanation for the corresponding Code provisions. The user is encouraged to consult it.
Since the first edition of this Code was published in 1924, AISC has continuously surveyed the structural steel design community and construction industry to determine standard trade practices. Since then, this Code has been periodically updated to reflect new and changing technology and industry practices.
The 2000 edition was the fifth complete revision of this Code since it was first published. Like the 2005 edition, the 2010 edition is not a complete revision but does add important changes and updates. It is the result of the deliberations of a fair and balanced Committee, the membership of which included structural engineers, architects, a code official, a general contractor, fabricators, a steel detailer, erectors, inspectors, and an attorney. The following changes have been made in this revision:
•The scope in Section 1.1 has been revised to cover buildings and other structures in a manner that is consistent with how buildings and other structures are treated in AISC 360 (the AISC Specification for Structural Steel Buildings). A similar and corresponding revision has been made in Section 1.4.
•The list of referenced documents in Section 1.2 has been editorially updated. •Section 1.9 has been added to emphasize that not all tolerances are explicitly covered in the Code, and that tolerances not covered are not to be assumed as zero. •Clarification has been added in Section 2 that base plates and bearing plates are considered structural steel if they are attached to the structural frame, but not if they are loose items that do not attach to the structural steel frame.
•Editorial improvements have been made in the Commentary to Section 3.1 to improve upon the list of items that should be provided in the contract documents, as well as to link column differential shortenin
g and anticipated deflections to information that has been added in the Commentary to Section 7.13.
•Explicit requirements have been added in Section 3.1.2 as “option 3” for when connection design work is delegated by the Structural Engineer of Record (SER) to be performed by another engineer. Provisions covering connection design by the
Code of Standard Practice for Steel Buildings and Bridges , April 14, 2010
AMERICAN INSTITUTE OF STEEL CONSTRUCTION
16.3-iv
SER (option 1) and selection or completion of basic tabular connections by a steel detailer (option 2) also have been revised for consistency with and distinction from option 3. Additionally, the defined term substantiating connection information  has been added to the Glossary, and revisions also have been made in Section 4 to correspond with the addition of option 3 in Section 3.1.2.
• Information has been added to the Commentary in Section 4.1 to summarize the importance and benefits of holding a pre-detailing conference to open lines of
communication and develop a common understanding about the project.
• Section 4.7 has been added to address requirements for erection drawings. • Section 6.4.3 has been modified to better address incidental camber in trusses. • Information has been added in the Commentary to Section 7.10.1 to better describe the provisions that relate to special erection conditions or other considerations that
are required by the design concept, as well as to highlight special considerations in the erection of cantilevered members.
• The intent in Section 7.13.1.2(d) has been clarified in the text as well as with the relocation of supporting Commentary.
• The intent in Section 10.2.5 has been editorially clarified for groove welds in butt joints and outside corner joints.
• The document has been editorially revised for consistency with current terms and other related documents.
The Committee thanks Glenn Bishop, the Council of American Structural Engineers (CASE), and its Guidelines Committee for their assistance and partnership in the development of Section 3.1.2 in this e
dition of the Code. Also, the Committee thanks Rex I. Lewis and Homer R. Peterson , II for their contributions as members of the Committee for part of this cycle of development, and honors Committee member Leonard R. Middleton, who passed away during this cycle.
By the AISC Committee on the Code of Standard Practice,
James A. Stori, Chairman Barry L. Barger, Vice Chairman William A. Andrews Paul M. Brosnahan Richard B. Cook William B. Cooper William R. Davidson Theodore L. Droessler Donald T. Engler Lawrence G. Griffis D. Kirk Harman Viji Kuruvilla Keith G. Landwehr
James L. Larson
H. Scott Metzger
Donald G. Moore
David B. Ratterman
David I. Ruby
Rex D. Smith
Thomas S. Tarpy, Jr.
James G. Thompson
Michael J. Tylk
Michael A. West
Charles J. Carter, Secretary
Amanuel Gebremeskel, Asst. Secretary
Code of Standard Practice for Steel Buildings and Bridges, April 14, 2010 AMERICAN INSTITUTE OF STEEL CONSTRUCTION 16.3-v
TABLE OF CONTENTS
Glossary (vii)
Section 1. General Provisions (1)
1.1. Scope (1)
1.2. Referenced Specifications, Codes and Standards (1)
1.3. Units (2)
1.4. Design Criteria (3)
1.5. Responsibility for Design (3)
editorially1.6. Patents and Copyrights (3)
1.7. Existing Structures (3)
1.8. Means, Methods and Safety of Erection (4)
1.9. Tolerances (4)
Section 2. Classification of Materials (5)
2.1. Definition of Structural Steel (5)
2.2. Other Steel, Iron or Metal Items (6)
Section 3. Design Drawings and Specifications (9)
3.1. Structural Design Drawings and Specifications (9)
3.2. Architectural, Electrical and Mechanical Design Drawings and Specifications (15)
3.3. Discrepancies (15)
3.4. Legibility of Design Drawings (16)
3.5. Revisions to the Design Drawings and Specifications (16)
3.6. Fast-Track Project Delivery (17)
Section 4. Shop and Erection Drawings (18)
4.1. Owner Responsibility (18)
4.2. Fabricator Responsibility (19)
4.3. Use of CAD Files and/or Copies of Design Drawings (20)
4.4. Approval (21)
4.5. Shop and/or Erection Drawings Not Furnished by the Fabricator (23)
4.6. The RFI Process (23)
4.7. Erection Drawings (24)
Section 5. Materials (25)
5.1. Mill Materials (25)
5.2. Stock Materials (26)
Section 6. Shop Fabrication and Delivery (28)
6.1. Identification of Material (28)
6.2. Preparation of Material (29)
6.3. Fitting and Fastening (29)
6.4. Fabrication Tolerances (30)
6.5. Shop Cleaning and Painting (33)
6.6. Marking and Shipping of Materials (35)

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