Structural timber - Sizes, permitted deviations

This technical document establishes the definitive dimensional specifications and permissible tolerance ranges for structural timber used in construction applications within Europe. It addresses the critical need for precision in wood sizing by defining standard cross-sectional dimensions for both planed and unplaned solid timber. The text provides a comprehensive framework for assessing the size of structural members, including the limits of deviation allowed during manufacturing and processing. By specifying these tolerances, the document ensures uniformity in quality control procedures and facilitates the seamless integration of timber components in engineering projects. It covers various timber profiles and details the measurement methods required to verify compliance with the established limits. The guidelines are designed to assist manufacturers, suppliers, and construction professionals in maintaining consistent product quality. Adherence to these specifications supports the safe and efficient design of timber structures while promoting compatibility across the supply chain.