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Steel Design Guide Series

Column Base Plates

Steel Design Guide Series

Column BasePlates
Design of Column Base Plates
John T. DeWolf Professor of Civil Engineering University of Connecticut Storrs, Connecticut

Some Practical Aspects of Column Base Selection
David T. Ricker Vice President, Engineering The Berlin Steel Construction Company, Inc. Berlin, Connecticut

A M E R I C AN

INSTITUTE

OF

STEEL

C O N S T R U C T I O N

© 2003 by American Institute of Steel Construction, Inc. All rights reserved. This publication or any part thereof must not be reproduced in any form without permission of the publisher.

Copyright  1990 by American Institute of Steel Construction, Inc.

All rights reserved. This book or any part thereof must not be reproduced inany form without the written permission of the publisher. 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 itsaccuracy, suitablility, and applicability by a licensed professional engineer, designer, or architect. 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 other person named herein, that this information is suitable for any general or particular use or of freedom from infringement of anypatent 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 suchmaterial 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 Second Printing: September 1991 Third Printing: October 2003

© 2003 by American Institute of Steel Construction, Inc. All rights reserved. This publication or any part thereof must not be reproduced in any form without permission of thepublisher.

CONTENTS
DESIGN OF COLUMN BASE PLATES
By John T. DeWolf

INTRODUCTION

1

LITERATURE REVIEW - DESIGN PROVISIONS Axially Loaded Base Plates . . . . . . . . . . . Base Plates with Moments . . . . . . . . . . . . Anchor Bolts for Tension . . . . . . . . . . . . Shear Loads ...................
DESIGN OF AXIALLY LOADED BASE PLATES Design Procedure ................ Design forLightest Plate . . . . . . . . . . . . . General Design Procedure . . . . . . . . . . . . Design Aid for Axially Loaded Base Plates . . . Base Plates Placed Eccentrically on the Concrete Foundations . . . . . . . . . . . . . . . . . . Determining the Design Load for Existing Base Plates ..................... Design of Lightly Loaded Base Plates . . . . . . Base Plates for Uplift Loading . . . . . . . .. . Base Plates for Tube and Pipe Columns . . . . . Base Plates with Large Loads . . . . . . . . . . Details for Base Plates . . . . . . . . . . . . . .

2 .2

DESIGN OF ANCHOR BOLTS FOR TENSION General Behavior ................ Minimum Bolt Lengths and Edge Distances . . Design of Hooked Bolts . . . . . . . . . . . . . Design of Bolts and Rods with a Nut . . . . . .

25 25 25 25 26

.2 .3.3 4 .4 .5 .6 .8
12 12 13 15 15 16 17

DESIGN FOR SHEAR 30 General Behavior . . . . . . . . . . . . . . . . 30 Proposed Design Approach . . . . . . . . . . . 31
APPENDIX A RESEARCH REVIEW Axially Loaded Columns Axial Load Plus Moment Anchor Bolts for Tension Shear Loads ....... REFERENCES NOMENCLATURE 33

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