Timber strength grading and strength classes
Wood Information Sheet 4-7
Document Status
Current
Supplement
Core Supplement
Series
Wood Information Sheet
Abstract
Strength grading of timbers used for structural purposes considering their regulations and standards, marking and documentation, grades and classes, moisture content, quality control and availability.
History
March 2021 edition. Supersedes the August 2017 edition. First published 1996, as 'Guide to strength graded softwood'; revised 2003, 2006, 2011, 2017 and 2021.
Subjects
- Materials
- Timber/joinery
Publisher History
BM TRADA originates during the 1930s when a forerunner of what later became the Timber Research and Development Association (TRADA) was set up to promote the use of wood in construction. Their publishing programme delivers an extensive range of timber information - Eurocode 5 guidance, span tables, Wood Information Sheets and technical manuals on timber structures, characteristics, performance aspects such as fire and durability, and common applications.
Information
NBS
NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.
Accuris
We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.