Structural timber - Determination of characteristic values of mechanical properties and density

This document specifies the general principles and procedures for determining characteristic values of mechanical properties and density for timber intended for structural applications. It outlines the methodologies required to analyze test data obtained from wooden specimens to establish design parameters. The approach focuses on statistical analysis to derive values that ensure the reliability and safety of timber used in construction. The scope covers various types of timber and the specific tests needed to assess strength, stiffness, and density. By providing a standardized framework, it enables consistent evaluation of material performance across different regions and supply chains. The document details the requirements for sampling, testing equipment, and data processing to ensure the accuracy and reproducibility of results. It serves as a technical reference for manufacturers, testing laboratories, and engineering professionals involved in the certification and design processes using structural timber. The guidance facilitates the harmonization of assessment methods, ensuring that characteristic values derived are suitable for structural design calculations.