Column Base Plates
ColumnBasePlates
Designof ColumnBasePlates
JohnT.DeWolf Professorof Civil EngineeringUniversityofConnecticutStorrs Connecticut
SomePracticalAspectsofColumnBaseSelection
DavidT.BickerTheBerlinSteel Construction Company，Inc. VicePresident EngineeringBerlin Connecticut
Copyright @ 1990
by
American Institute of Steel Construction Inc.
All rights reserved. This book or any part thereof must not be reproduced in any form without thewritten permission of the publisher.
to be accurate this information should not be used or relied upon for any specific appli-The publication of the material contained herein is not intended as a representation or warranty on the part of the American Institute of Steel Construction or of any otheror of freedom from infringement of any patent or patents. Anyone making use of this information assumes all liabiity arising from such use.
Caution must be exercised when relying upon other specifications and codes developedby other bodies and incorporated by reference herein since such material may be mod-ified 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 incorporateit by reference at the time of the initial publication of this edition.
Printed in the United States of AmericaSecond Printing: September 1991
Third Printing: October 2003
CONTENTS
By John T. DeWolf
DESIGN OF COLUMN BASE PLATES
INTRODUCTION 1
LITERATURE REVIEW - DESIGN PROVISIONS 2
Base Plates with Moments Axially Loaded Base Plates .2 .2Anchor Bolts for Tension Shear Loads .3.3
DESIGN OF AXIALLY LOADED BASE PLATES 4
Design Procedure .4Design for Lightest Plate General Design Procedure .6 .5Design Aid for Axially Loaded Base Plates Base Plates Placed Eccentrically on the Concrete .8Foundations 12Determining the Design Load for Existing Base Plates 12Design of Lightly Loaded Base Plates Base Plates for Uplift Loading 15 13Base Plates with Large Loads Base Plates for Tube and Pipe Columns 15Details for Base Plates 17 16
DESIGN OF BASE PLATES WITH MOMENTS 18
General Bchavior Design for Small and Moderate Eccentricities 81 19Design for Large Eccentricities 21Design Aid for Plates with Large Eccentricities .23
DESIGN FOR SHEAR General BehaviorProposed Design Approach 31
Axially Loaded Columns 33Axial Load Plus Moment 9EAnchor Bolts for Tension Shear Loads 37 36
NOMENCLATURE 42
APPENDIX BSOMEPRACTICALASPECTS OF COLUMN BASE SELECTION 43By David T. Ricker
APPENDIX C DESIGN OF SMALL BASE PLATESBy W.A. Thormon FOR WIDE FLANGE COLUMNS 52
PREFACE
This booklet was prepared under the direction of theCommittee on Research of the American Institute of Steel Construction Inc. as part of a series of publications onspecial topics related to fabricated structural stl. Itspurpose is to serve as a supplemental reference to the AISC Manual ofSteel Construction to assist practicing engineersengaged in building design.
The design guidelines suggested by the author that ae outside the scope of the AISC Specifications or Code donot represent an offcial position of the Institute and arenot intended to exclude other design methods and proce- dures. It is recognized that the design of structures is withinenginer architet or ther licnsed professinal for th the scope of expertise of a petent licensed structuralapplication of principles to a particular structure.
The sponsorship of this publication by the American Iron and Steel Institute is gratefully acknowledged.
engineering principles and is for general information only. While it is believed to be accurate this The informction presented in tkis publication has been prepared in accordance with recognizedinformtin sholdbesedorreliedponfornspecjficaplitiwiho eten professinlengineer designer rarchitectThe publicationofthemterilconined hereinisnt intendedasα examination and verfication of its accwracy suitobility and applicabiliy by α licensed professionolrepresenttionorwarranynthepartoftheAmericanstiteofSteelonstrctionInc.rtheAmerian Iron an SteeIstiute or ofany other person nmed herein rha this information is stable for aygeneral or particulr use or ofeedom infringement ofany patent orpatens. Anyone making use ofthis information assaes allibiliy arising from sach use.
