ISO 13061-3:2014/Amd 1:2017

Overview

ISO 13061-3:2014/Amd 1:2017 is an important amendment to the international standard specifying test methods for determining the ultimate strength in static bending of small clear wood specimens. Managed by the International Organization for Standardization (ISO) under Technical Committee ISO/TC 218 (Timber), this standard focuses on physical and mechanical properties of wood. It provides precise guidelines for evaluating wood’s bending strength, critical for both research and industry applications.

This amendment updates the original 2014 edition by revising test method references to ensure greater accuracy and consistency in strength assessment procedures. It is fundamental for professionals involved in wood materials testing, quality control, forestry research, and structural engineering.

Key Topics

• Scope and Purpose
  Defines procedures for testing the ultimate strength of small, defect-free wood samples under static bending load conditions. This test determines the maximum load the specimen can sustain before failure.

• Test Specimen Requirements
  Specifies characteristics and preparation of small clear wood specimens to ensure uniformity and reliability of results.

• Measurement Accuracy
  Introduces an updated requirement for linear deflection measurement accuracy of at least 0.02 mm as per ISO 13061-4. This is essential for combined tests involving both ultimate strength and modulus of elasticity in static bending.

• Test Setup and Procedures
  Details the mechanical setup, loading methods, and calculation techniques to obtain consistent and reproducible bending strength data.

• Harmonization with Related Standards
  Updates references to related parts of the ISO 13061 series, ensuring standardization across multiple wood testing methods.

Applications

ISO 13061-3:2014/Amd 1:2017 is widely applied in:

• Wood Quality Assessment
  Enabling producers and researchers to quantify the mechanical strength properties of timber samples, supporting grading and classification.

• Structural Engineering & Design
  Providing essential data for the safe design of wooden structures by understanding bending strength limits.

• Material Research and Development
  Guiding development of engineered wood products by assessing performance under bending stresses.

• Certification & Compliance Testing
  Assisting manufacturers and testing laboratories in meeting international quality and safety standards.

• Forestry and Wood Science
  Supporting studies on wood variability, species comparisons, and effects of treatments on mechanical properties.

Related Standards

ISO 13061-3:2014/Amd 1:2017 aligns with other standards in the ISO 13061 series, which collectively address various mechanical and physical testing methods for wood, including:

• ISO 13061-4: Test methods for the determination of the modulus of elasticity in static bending, referenced for deflection measurement accuracy.

• ISO 13061-1: General requirements and test conditions for small clear wood specimens (superseded in this amendment for certain references).

• Additional parts of the ISO 13061 series covering density, moisture content, compression strength, and hardness tests.

These interconnected standards facilitate comprehensive evaluation of wood properties, encouraging harmonization and consistency in international wood testing practices.

Keywords: ISO 13061-3:2014, wood testing standard, static bending test, ultimate strength of wood, mechanical properties of timber, small clear wood specimens, wood material testing, modulus of elasticity, deflection measurement, structural wood testing, ISO wood standards.