# Structural Timber Design by Abdy Kermani

Structural Timber Design by Abdy Kermani

## Preface to Structural Timber Design

The increasing recognition of timber as a structural material is reflected in the inclusion of timber design in many undergraduate courses.

Majority of design textbooks for undergraduate engineering students neglect, to a large extent, the importance of timber as a structural and building material.

As a consequence, relatively few textbooks provide information on the design of timber structures.

Structural Timber Design is intended to address this issue by providing a step-by-step approach to the design of all the most commonly used timber elements and joints illustrated by detailed worked examples.

This is an approach which is recognised to be beneficial in learning and preferred by most students.

The book has been written for undergraduate students on building, civil and structural engineering and architectural courses and will be an invaluable reference source and design aid for practising engineers and postgraduate engineering students.

It provides a comprehensive source of information on practical timber design and encourages the use of computers to carry out design calculations.

Chapter 1 introduces the nature and inherent characteristics of timber such as defects, moisture content and slope of grain,

and discusses the types of timber and factors that influence their structural characte includes a comprehensive review of the recently revised t 2: 1996: Structural Use of Timber.

The design philosophy of its new approach to the strength class system and also the factors affecting timber strength are explained.

Chapter 3 gives an overview of [email protected], a computer software programme used to carry out mathematical calculations, and details its simplicity and the advantages that it provides when used for design calculations.

The aim is to encourage readers to use computing as a tool to increase their under-standing of how design solutions vary in response to a change in one of the variables and how alternative design options can be obtained easily and effortlessly.

The design of basic elements is explained and illustrated in Chapters 4 and 5, whilst the design of more specialised elements such as glued laminated straight and curved beams and columns,

Plywebbed beams and built-up columns is illustrated in Chapters 6, 7 and 8 using numerous worked examples In Chapter 9 the design of timber connections is detailed.

The new approach adopted by the revised BS 5268 : Part 2 in 1996, i.e. the Eurocode 5 approach for the design of timber joints, is described.

The chapter includes a comprehensive coverage of the design requirements for nailed, screwed, bolted and dowelled joints, and the design of connectored joints such as toothed-plates, split-rings and shear-plates and glued connections is also detailed

Several step-by-step worked examples are provided to illustrate the design methods in this chapter.

Chapter 10 provides a comprehensive review of the proposed European code for timber, Eurocode 5: Design of Timber Structures.

The limit states design philosophy of EC5 is explained and the relevant differences with the design methodology of BS 5268 are high~ghted and discussed.

This chapter also provides comprehensive coverage of EC5 requirements for the design of flexural and axially 1o.aded members and dowel-type connections such as nailed, screwed, bolted and dowelled joints.

Again, step-by-step worked examples are provided to illustrate the design methods in the chapter.

All design examples given in this book are produced in the form of worksheet files and are available from the author on 3r disks to run under Mathcad computer software Version 6, or higher, in either one of its editions: (Student, Standard, Plus or Professional).

Details are given at the end of the book. The examples are fully self-explanatory and well annotated and the author is confident that the readers whether students,

Course instructors, or practising design engineers will find them extremely useful to produce design solutions or prepare course handouts.