CodeofStandardPractice forSteelBuildings and Bridges
June 15 2016
Supersedes the Code of Srandard Practice for Steel Buildings and Bridgesdated April 14 2010 and all previous versions
Approved by the Committee on the Code of Standard Practice
AISC 2016
by
American Institute of Steel Construction
All rights reserved. This book or any part thereof mast mot be reproduced in ary form withour thewritten permission of the publisher.The AISC logo is α registered trademark of AiSC
following American National Standards Institute (ANSI) consensus procedures and recog- The information presented in this publication has been prepared by a balanced mitteenized principles of design construction and contract interpetation. This document isintended as a statement of custom and usage in structural steel construction. Competent design construction and legal advice should be sought when applying the provisions of thisdocument to a specific construction project or contract document. The publication of this information is not a representation or warranty on the part of the American Institute of SteelConstruction its officers agents employees or mitte members or of any other personnamed herein. All representations or warranties express or implied other than as stated above are specifically disclaimed. Anyone making use of the information presented in thisn ns s e e sass
Caution must be exercised when relying upon standards and guidelines developed by otheramended from time to time subsequent to the publication of this edition. The American bodies and incorporated by reference herein since such material may be modified orInstitute of Steel Construction 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
PREFACE
(This Preface is not part of ANSI/AISC 303-16 but is included for informational purposesonly.)
design purchase fabrication and erection of structural steel. This Code provides a useful As in any industry trade practices have developed among those that are involved in thestructural steel. As such it is useful for owners architects engineers general contractors framework for a mon understanding of the acceptable standards when contracting forconstruction managers fabricatoes steel detailers erectors and others associated with con-struction in structural steel. Unless specific provisions to the contrary are contained in the contract documents the existing trade practices contained herein are considered to be thestandard custom and usage of the industry and are thereby incorporated into the relation- ships between the parties to a contract.
It is important to note the differences in design requirements between buildings andbridges. ANSIAISC 360 and 341 establish the design requirements for buildings and building- like structures and this Code sets plementary mercial and technical requirements.For highway bridges the governing design requirements are established by AASHTO and implemented by the contracting agency; the mercial provisions of the Code are appli-cable but technical provisions such as tolerances are not addressed.
Code a nonmandatory Commentary has been prepared to provide background and further The Symbols and Glossary are an integral part of this Code. In many sections of thisexplanation for the corresponding Code provisions. The user is encouraged to consult it.
This Code is writtenand intended to be utilized in practiceas a unified document.uoa u papiod se apo p jo suosiaoad enpapu apuadns eu suunop soeuo1.1 except when doing so would violate a requirement of the applicable building code.
Since the first edition of this Code was published in 1924 AISC has continuously sur-trade practices. Since then this Code has been periodically updated to reflect new and veyed the structural steel design munity and construction industry to determine standardchanging technology and industry practices.
Like the 2005 and 2010 editions the 2016 edition is not a plete revision but does add The 2000 edition was the fifth plete revision of this Code since it was first published.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 offi-cial a general contractor fabricators a steel detailer erectors inspectors and an aftormey.The following changes have been made in this revision:
• This Code is formally accredited by ANSI as an American National Standard.• The language throughout the entire Code has been generalized to address contracts thatpreviously addressed models separately has been eliminated. utilize drawings models or drawings and models in bination and Appendix A which• The Commentary in Section 1.1 has been updated to acknowledge that some portions of ANSI/AISC 303 are incorporated into the Internarional Buiding Code through referenceto those provisions in ANSI/AISC 360 and 341.•The list of dates of referenced documents in Section 1.2 has been editorially updated. • A new Section 1.4 has been added to address responsibility for identifying contract docu-ments; subsequent sections have been renumbered.
• Section 1.10 has increased emphasis that the absence of a tolerance in this Code does notu sauoz papoooud so suauanbu Sue ssappe o pappe uaaq seu 1l'I uons ▪ mean that tolerance is zero.frames designed to meet the requirements of ANSI/AISC 341.• A reference has been added in the Commentary to Section 2.2 to AISC Design Guide 27 for stainless steel.• In Section 3.1 two items are added to the list of required information: preset requirements for free ends of cantilevered members and the drawing information required inANSI/AISC 341.• Sections 3.1.1 and 3.1.2 have been editorially switched in order. The resulting Section 3.1.2 (formerly Section 3.1.1) also has been improved to better address what is requiredfor bidding when the owner’s designated representative for design delegates the determi- nation and design of member reinforcement at connections to the licensed engineer inresponsible charge of the connection design.▪ Section 3.2 has been updated to address revisions if they are necessary when referenced contract documents are not available at the time of design bidding detailing or fabrication.• Seetion 3.3 has added emphasis that the fabricator need not discover design discrepancies. • Sections 3.7 and 4.2.2 have been added to address intellectual property rights of theowner’s designated representative for design and the fabricator respectively.• Section 4.4 has been clarified to better reflect the role of the connection design criteria required in Section 3.1.1 when connection design work is delegated.• Commentary has been added to Section 4.5 to address potential pitfalls when fabrication and erection documents are not furmished by the fabricator.• In Section 6.1.1 the listed shop-standard material grades have changed for HP-shapes and• In Section 6.4.2 the tolerance for curved members has been improved. HSS.• In Section 7.5.1 tolerances for anchor-rod placement have been revised for consistency with the hole sizes provided the AISC Steel Constraction Manural and the tolerances givenin ACI 117.▪ In Section 7.8.3 the number of extra bolts required to be supplied has been increased to account for bolt loss and pre-installation verification testing requirements; also backing• In Section 7.8.4 non-steel backing is now addressed. has been clarified as steel backing.▪ In Section 7.13 the term *building line" has been changed to “building exterior.”*• Commentary has been added in Section 7.13.1.2(e) to coordinate with the cantilevered member preset information added in Section 3.1.• Section 10 has been significantly revised with multiple categories for AESS and different • Section 9.1.5 has been added to address allowances when used.treatments required for each.• The document has been editorially revised for consistency with current terms and other related documents.
The Committee thanks Jeffrey Dave Douglas Fitzpatrick Angela Stephens and LawrenceKruth for their contributions to integrating treatment of model-based contracts throughout this Code; Walter Koppelaar Terri Boake and Jack Petersen for their contributions to theupdate of Section 10; and George Wendt Charles Wood John Rogers and Brian Smith fortheir contributions to the improvement of tolerances for curved members.
The Committee thanks Michael J. Tylk Donald G. Moore and Paul M. Brosnahan fortheir contributions as members of the Committee for part of this cycle and honors Committee member Keith G. Landwehr who passed away during this cycle.
By the AISC Committee on the Code of Standard Practice
James L. Larson Viji KuruvillaH. Scott Metzger James A. MinkkinenDavid B. RattermanDavid I. Ruby James A. StoriThomas S. Tarpy Jt. James G. ThompsonSteven F. WeissMichael A. West Charles J. Carter SecretaryTimothy J. Bradshaw Asst. Secretary
William A. Andrews Vice Chair Babette C. Freund ChairJon D. Andrews Scott F. ArmbrustBarry L. Barger EmeritusTheodore L. Droessler William R. DavidsonDonald T. Engler Lawrence G. GriffisSamuel G. HaldimanTimothy J. Hanenburg D. Kirk HarmanLawrence A. Kloiber
