TS EN 844-9

TS EN 844-9 is the ninth part of a terminology standard that defines the terms and definitions used for features of sawn timber. In technical timber practice, terminology standards create a common language so that the same physical or visual characteristics are understood consistently across trade, specification, and inspection contexts. This document focuses on the vocabulary used to describe timber features rather than on setting performance requirements for the timber itself.

Terms used to describe sawn timber features

The scope covers terms for features that can be observed or described on sawn timber. In general technical use, such features include surface appearance, grain direction, knots, checks, distortions, and similar characteristics. Clear terminology matters because classification, ordering, and quality description depend on everyone interpreting the same feature in the same way. TS EN 844-9 provides a vocabulary framework for those descriptions.

Why this vocabulary matters in timber work

• Helps standardise wording used in specifications and orders.
• Reduces ambiguity when different organisations describe the same timber feature.
• Supports consistent interpretation in grading, inspection, and commercial communication.
• Provides a reference language aligned with CEN terminology use.

This TSE edition is based on EN 844-9:1997 and is now withdrawn. It therefore remains relevant as a historical terminology reference, especially when working with older European timber standards or archived technical documents. Its purpose is to define terms relating to features of sawn timber, not to prescribe a product test method or a new material requirement.