Structural Timber Design to Eurocode 5

Structural Timber Design to Eurocode 5 provides
practising engineers and specialist contractors with comprehensive,
detailed information and in-depth guidance on the design of timber
structures based on the common rules and rules for buildings in
Eurocode 5 - Part 1-1. It will also be of interest to
undergraduate and postgraduate students of civil and structural
engineering.

It provides a step-by-step approach to the design of all of the
commonly used timber elements and connections using solid timber,
glued laminated timber or wood based structural products, and
incorporates the requirements of the UK National Annex. It
covers:

• strength and stiffness properties of timber and its
  reconstituted and engineered products

• key requirements of Eurocode 0, Eurocode 1 and Eurocode 5

• Part 1-1

• design of beams and columns of solid timber, glued laminated,
  composite and thin-webbed sections

• lateral stability requirements of timber structures

• design of mechanical connections subjected to lateral and/or
  axial forces

• design of moment resisting rigid and semi-rigid
  connections

• racking design of multi-storey platform framed walls

Featuring numerous detailed worked examples, the second edition
has been thoroughly updated and includes information on the
consequences of amendments and revisions to EC5 published since the
first edition, and the significant additional requirements of BSI
non contradictory, complimentary information document (PD 6693-1-1)
relating to EC5. The new edition also includes a new section on
axial stress conditions in composite sections, covering combined
axial and bending stress conditions and reference to the major
revisions to the design procedure for glued laminated timber.

Autorentext

Jack Porteous is a consulting engineer specialising in
timber engineering. He is a Chartered Engineer, Fellow of the
Institution of Civil Engineers and Member of the Institution of
Structural Engineers. He is a member of the BSI committee B/525/5,
which is responsible for the structural use of timber in the UK and
for the production of UK input to EN 1995-1-1. He is a member of
the editorial advisory panel of the ICE publication, Construction
Materials and a visiting scholar and lecturer in timber engineering
at Edinburgh Napier University.

Abdy Kermani is the Professor of Timber Engineering
and Director of the UK's Centre for Timber Engineering at
Edinburgh Napier University. He is a Chartered Engineer, Fellow of
the Institution of Structural Engineers and Fellow of the Institute
of Wood Science. He has served on the organising committees and
editorial technical advisory boards of international journals and
conferences on timber engineering and the innovative use of
construction materials. He is the appointed principal consultant to
several UK and European structural and timber engineering firms and
manufacturing industries.

Zusammenfassung

Structural Timber Design to Eurocode 5 provides practising engineers and specialist contractors with comprehensive, detailed information and in-depth guidance on the design of timber structures based on the common rules and rules for buildings in Eurocode 5 Part 1-1. It will also be of interest to undergraduate and postgraduate students of civil and structural engineering.

It provides a step-by-step approach to the design of all of the commonly used timber elements and connections using solid timber, glued laminated timber or wood based structural products, and incorporates the requirements of the UK National Annex. It covers:

• strength and stiffness properties of timber and its reconstituted and engineered products
• key requirements of Eurocode 0, Eurocode 1 and Eurocode 5 Part 1-1
• design of beams and columns of solid timber, glued laminated, composite and thin-webbed sections
• lateral stability requirements of timber structures
• design of mechanical connections subjected to lateral and/or axial forces
• design of moment resisting rigid and semi-rigid connections
• racking design of multi-storey platform framed walls
  Featuring numerous detailed worked examples, the second edition has been thoroughly updated and includes information on the consequences of amendments and revisions to EC5 published since the first edition, and the significant additional requirements of BSI non contradictory, complimentary information document (PD 6693-1-1) relating to EC5. The new edition also includes a new section on axial stress conditions in composite sections, covering combined axial and bending stress conditions and reference to the major revisions to the design procedure for glued laminated timber.

Inhalt

Preface to the Second Edition xii

1 Timber as a Structural Material 1

1.1 Introduction 1

1.2 The structure of timber 2

1.3 Types of timber 3

1.3.1 Softwoods 3

1.3.2 Hardwoods 4

1.4 Natural characteristics of timber 4

1.4.1 Knots 4

1.4.2 Slope of grain 5

1.4.3 Reaction wood 5

1.4.4 Juvenile wood 6

1.4.5 Density and annual ring widths 6

1.4.6 Conversion of timber 7

1.4.7 Seasoning 11

1.4.8 Seasoning defects 11

1.4.9 Cracks and fissures 11

1.4.10 Fungal decay 11

1.5 Strength grading of timber 11

1.5.1 Visual grading 12

1.5.2 Machine grading 12

1.5.3 Strength classes 15

1.6 Section sizes 16

1.7 Engineered wood products (EWPs) 16

1.7.1 Glued-laminated timber (glulam) 18

1.7.2 Cross-laminated timber (CLT or X-Lam) 20

1.7.3 Plywood 21

1.7.4 Laminated veneer lumber (LVL) 25

1.7.5 Laminated Strand Lumber (LSL), TimberStrand® 25

1.7.6 Parallel Strand Lumber (PSL), Parallam® 27

1.7.7 Oriented Strand Board (OSB) 27

1.7.8 Particleboards and fibre composites 39

1.7.9 Thin webbed joists (I-joists) 39

1.7.10 Thin webbed beams (box beams) 41

1.7.11 Structural Insulated Panels (SIPs) 42

1.8 Suspended timber flooring 44

1.9 Adhesive bonding of timber 46

1.10 Preservative treatment for timber 47

1.11 Fire safety and resistance 48

1.12 References 50

2 Introduction to Relevant Eurocodes 52

2.1 Eurocodes: General structure 52

2.2 Eurocode 0: Basis of structural design (EC0) 54

2.2.1 Terms and definitions (EC0, 1.5) 54

2.2.2 Basic requirements (EC0, 2.1) 55

2.2.3 Reliability management (EC0, 2.2) 56

2.2.4 Design working life (EC0, 2.3) 56

2.2.5 Durability (EC0, 2.4) 57

2.2.6 Quality management (EC0, 2.5) 58

2.2.7 Principles of limit state design: General (EC0, 3.1) 58

2.2.8 Design situations (EC0, 3.2) 58

2.2.9 Ultimate limit states (EC0, 3.3) 59

2.2.10 Serviceability limit states (EC0, 3.4) 59

2.2.11 Limit states design (EC0, 3.5) 60

2.2.12 Classification of actions (EC0, 4.1.1) 60

2.2.13 Characteristic values of actions (EC0, 4.1.2) 60

2.2.14 Other representative values of variable actions (EC0, 4.1.3) 61

2.2.15 Material and product properties (EC0, 4.2) 62

2.2.16 Structural analysis (EC0, 5.1) 62

2.2.17 Verification by the partial factor method: General (EC0, 6.1) 65

2.2.18 Design values of actions (EC0, 6.3.1) 65

2.2.19 Design values of the effects of actions (EC0, 6.3.2) 66

2.2.20 Design values of material or product properties (EC0, 6.3.3) 66

2.2.21 Factors applied to a design strength at the ULS 71

2.2.22 Design values of geometrical data (EC0, 6.3.4) 71

2.2.23 Design resistance (EC0, 6.3.5) 71

2.2.24 Ultimate limit states (EC0, 6.4.16.4.5) 73

2.2.25 Serviceability limit states: General (EC0, 6.5) 77

2.3 Eurocode 5: Design of Timber Structures Part 1-1: General Common Rules and Rules for Buildings (EC5) 79

2.3.1 General matters 79

2.3.2 Serviceability limit states (EC5, 2.2.3) 80

2.3.3 Load duration and moisture influences on strength (EC5, 2.3.2.1) 84

2.3.4 Load durat…