GD3 Timber materials - Properties and associated design procedures with Eurocodes

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For engineers who want to understand design to Eurocodes, this document explains the principles behind the limit states approach and the basis for the characteristic values used in design. The derivation of the strength and design properties of materials are explained, together with partial factors and the modification factors which are used specifically in timber design. Solid timber, glulam, LVL, structural wood-based panels, structural adhesives, metal fasteners and connectors are all considered.


  • Principles of limit state design with Eurocodes
  • Design values for material properties - general principles
  • Load cases and time dependency
  • Basis for characteristic values
  • Design properties for glulam and LVL
  • Geometrical data
  • Stiffness parameters in analysis
  • Partial factor for materials properties in design
  • Load duration classifications and modifications
  • Effect of member size on strength
  • Structural wood-based panels
  • Structural adhesives
  • Metal fasteners and connectors

Suggested Reading

List of Wood Information Sheetsnavigation-arrow

This document contains a fully comprehensive list of all the most up to date Wood Information Sheets (WIS) published by TRADA. Available to members for free or non-members for £12.00, these Wood Information Sheets provide technical guidance related to almost every timber topic under the sun.



  • Timber -...

18/02/2020 |  Wood Information Sheet  

Eliminating the use of adhesives and steel connections in engineered wood productsnavigation-arrow

Dan Bradley reports on an international research project that hopes to develop an alternative.


31/05/2019 |  Magazine Article  

Wood-based panel products for formwork liningsnavigation-arrow

Wood products have traditionally been used as lining materials for formwork to concrete. Although timber planks were originally used as formwork linings, wood-based panel products are now more common in modern concrete construction.

This Wood Information Sheet (WIS) outlines a number of the key points and considerations to...

12/03/2020 |  Wood Information Sheet