Structural Design in Wood
The prime purpose of this book is to serve as a design is of considerable value in helping the classroom text for the engineering or architec student make the transition from the often sim ture student. It will, however, also be useful to plistic classr
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Professor Emeritus, University of Colorado, Denver
SPRINGER-SCIENCE+BUSINESS MEDIA, B.V.
Library of Congress Cataloglng-ln-PubUcation Stalnaker, Judith J. Structural design in wood IJudith J. Stalnaker, Bmest C. Harris. -- 2nd ed. p. cm. Includes bibliographical references and index. ISBN 978-1-4613-6827-4 ISBN 978-1-4615-4082-3 (eBook) DOI 10.1007/978-1-4615-4082-3 1. Building, Wooden. 2. Structural design. 1. Harris, Bmest C. II. TitIe. 96-15280 INPROCBSS 624.1 '84--dc 20 CIP
Brltlsh Library Cataloguing In PubUcation Data avallable Cover design: Curtis Tow Graphics Copyright © 1997 by Springer Science+Business Media Dordrecht Third printing by Kluwer Academic Publishers 1999 Originally published by Chapman & HaIl in 1997 Ali rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any means, mechanica1, photo-copying, recording, or otherwise, without the prior written permission of the publisher, Kluwer Academic Publishers, 101 Philip Drive, Assinippi Park, Norwell, Massachusetts 02061
Printed on acid-free paper.
Contents
Preface
/
1. Introduction
1-1. 1-2. 1-3. 1-4. 1-5. 1-6.
3. Production and Grading of Sawn Lumber / 32
xi /
1
Evolution of Timber Design / Material Properties / 2 Types of Construction / 2 Hybrid Construction / 8 Timber Bridges / 8 Notes to Students / 9 References / 10
2. Wood Structure and Properties
2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. 2-9. 2-10. 2-11. 2-12. 2-13. 2-14.
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10.
1
/
11
Wood as a Structural Material 11 Problems in Use of Wood for Structures / 11 Advantages of Wood as a Structural Material / 11 Classification of Wood / 12 Wood Structure / 14 Juvenile Wood / 17 Wood Axes / 17 Factors Affecting Strength / 17 Moisture Content / 18 Example 2-1 / 20 Example 2-2 / 20 Specific Gravity / 20 Time-Dependent Behavior of Wood / 21 Strength-Reducing Characteristics / 22 Thermal Properties of Wood / 26 Tests and Properties of Interest to the Structural Designer / 27 References / 30 Problems / 30
Lumber Production / 32 Standard Sizes of Lumber / 32 Finish Designations / 34 Cutting Patterns / 34 Drying / 36 Lumber Grading / 37 Types of Grading / 37 Definitions / 38 Modem Grading Rules / 39 Example of Visual Grading of Beams and Stringers / 40 3-11. Grading Stamps / 41 3-12. Caution to Designer and Builder / 41 3-13. Board Measure / 42 Example 3-1 / 42 References / 43 Problem / 43 4. Loads and Design Values
4-1. 4-2.
4-3.
4-4. 4-5.
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Part I. Loads / 44 General / 44 Dead Loads / 45 Example 4-1 / 45 Example 4-2 / 46 Example 4-3 / 47 Vertical Live Loads / 48 Example 4-4 / 49 Example 4-5 / 51 Example 4-6 / 51 Example 4-7 / 51 Example 4-8 / 51 Wind Loads 51 Stability Under Wind Loads
44
/ 53 v
vi
CONTENTS
Example 5-22 / 95 References / 95 Problems / 95
4-6.
Load Combinations / 54 Example 4-9 / 54 Example 4-10 / 55 4-7. Seismic Loads / 56 Example 4-11 / 59 Part II. Design Values / 59 4-8. Design Values / 59 4-9. Base Design Values / 59 4-10. Adjustment Fa
