Productividad

Concrete Formwork Svstems
I Awad S. Hanna
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University of Wisconsin-Ma dison Madison, Wisconsin

Copyright 1999 by Marcel Dekker, Inc. All Rights Reserved.

Library of Congress Cataloging-in-Publication Data Hanna, Awad S. Concrete formwork systems / by Awad S. Hanna. p. cm.—(Civil and environmental engineering series: vol. 2) Includes index. ISBN 0-8247-0072-4 (alk. paper) 1.Concrete construction—Formwork. I. Title. II. Series. TA382.44.H36 1998 624.1′834—dc21 98-37262 CIP

This book is printed on acid-free paper. Headquarters Marcel Dekker, Inc. 270 Madison Avenue, New York, NY 10016 tel: 212-696-9000; fax: 212-685-4540 Eastern Hemisphere Distribution Marcel Dekker AG Hutgasse 4, Postfach 812, CH-4001 Basel, Switzerland tel: 44-61-261-8482; fax: 44-61-261-8896 WorldWide Web http://www.dekker.com The publisher offers discounts on this book when ordered in bulk quantities. For more information, write to Special Sales/Professional Marketing at the headquarters address above. Copyright  1999 by Marcel Dekker, Inc. All Rights Reserved. Neither this book nor any part may be reproduced or transmitted in any form or by any means, electronic or mechanical, includingphotocopying, microfilming, and recording, or by any information storage and retrieval system, without permission in writing from the publisher. Current printing (last digit): 10 9 8 7 6 5 4 3 2 1 PRINTED IN THE UNITED STATES OF AMERICA
Copyright 1999 by Marcel Dekker, Inc. All Rights Reserved.

Civil and Environmental Engineering
A Series of Reference Books and Textbooks
Editor

Departmentof Civil and Environmental Engineering Georgia Institute of Technology Atlanta, Georgia

Michael D. Meyer

1. Preliminary Design of Bridges for Architects and Engineers Michele Melaragno 2. Concrete Formwork Systems Awad S. Hanna 3. Multilayered Aquifer Systems: Fundamentals and Applications Alexander H.-D. Cheng 4. Matrix Analysis of Structural Dynamics: Applications and EarthquakeEngineering Franklin Y. Cheng 5. Hazardous Gases Underground: Applications to Tunnel Engineering Barry R. Doyle 6. Cold-Formed Steel Structures to the AISI Specification Gregory J. Hancock, Thomas M. Murray, Duane S. Ellifritt 7. Fundamentals of Infrastructure Engineering: Civil Engineering Systems: Second Edition, Revised and Expanded Patrick H. McDonald 8. Handbook of Pollution Control and WasteMinimization edited by Abbas Ghassemi 9. Introduction to Approximate Solution Techniques, Numerical Modeling, and Finite Element Methods Victor N. Kaliakin 10. Geotechnical Engineering: Principles and Practices of Soil Mechanics and Foundation Engineering V. N. S. Murthy

Additional Volumes in Production

Chemical Grouting and Soil Stabilization: Third Edition, Revised and Expanded Reuben H. KarolEstimating Building Costs Calin M. Popescu, Kan Phaobunjong, Nuntapong Ovararin

Preface

Formwork development has paralleled the growth of concrete construction throughout the 20th century. In the last several decades formwork technology has become increasingly important in reducing overall costs, since the structural frame constitutes a large portion of the cost of a formwork system. This bookhas three objectives. The first is to provide technical descriptions and evaluations of ten formwork systems that are currently used in concrete construction. The second is to serve as a tool to assist contractors in selecting the optimal formwork system. The third is to present the design criteria for conventional formwork for slabs and walls using the stress and the stress modification factorsprovided by the National Design Specifications (NDS) and the American Plywood Association (APA). Following a comprehensive introductory chapter, five types of formwork systems for concrete slabs are presented in chapters 2–5. These are conventional wood forms, conventional metal forms, flying forms, the column-mounted shoring system, and tunnel forms. The last four chap-

ters describe five types...