Manual of Steel Construction LRFD 2003 1

Revisions, January 2003
Manual of Steel Construction
Load and Resistance Factor Design
3rd Edition
The following technical revisions and corrections have been made
in the second printing of the Third Edition (January, 2003). To facilitate the incorporation of revisions and corrections, this booklet
has been constructed using excerpts from revised pages, with corrections noted. The user may findit convenient in some cases to
hand-write corrections; in others, a cut-and-paste approach may
be more efficient.

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Copyright © 2001
by
American Institute of Steel Construction, Inc.
ISBN 1-56424-051-7
All rights reserved. This book or any part thereof
must not be reproduced in any form without the
written permission of the publisher.
The information presented in this publication has beenprepared 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 ofthe material contained herein
is not intended 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 beexercised 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
First Printing: November 2001
Second
Printing:
January
Second
Printing:
January
2003 2003
with revisions

AMERICAN INSTITUTE OF STEEL CONSTRUCTION

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PREFACE
rd

This 3 Edition LRFD Manual of Steel Construction is the twelfth major update of the
AISC Manual of Steel Construction, which was first published in 1927. With this revision,
member andconnection design information has been condensed back into a single
volume. It has been reorganized and reformatted to provide practical and efficient access
to the information it contains, with a roadmap format to guide the user quickly to the
applicable specifications, codes and standards, as well as the applicable provisions in
those standards.
The following specifications, codes and standards areincluded in or with this Manual:
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1999 LRFD Specification for Structural Steel Buildings
2000 LRFD Specification for Steel Hollow Structural Sections
2000 LRFD Specification for Single-Angle Members
2000 RCSC Specification for Structural Joints Using ASTM A325 or A490 Bolts
2000 Code of Standard Practice for Steel Buildings and Bridges
AISC Shapes Database V3 CD

The following majorimprovements have been made in this revision:
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Workable gages for flange fasteners have been reintroduced.
The revised T, k and k1 values for W-shapes and the 0.93 wall-thickness reduction
factor for HSS have been considered.
Guidance is provided on the new OSHA safety regulations, stability bracing
requirements and proper material specification.
New information isprovided on design drawing information requirements, criteria
needed for connection design, mill, fabrication and erection tolerances, façade
issues, temperature effects and fire protection requirements with summaries of
common UL assemblies.
Shape information has been updated to the current series.
Coverage of round HSS has been added.
Dimensions and properties have been added for double...