Overview
ISO 13061-17:2017 is an international standard that specifies a reliable test method for determining the ultimate stress in compression parallel to the grain of small clear wood specimens. Published by the International Organization for Standardization (ISO), this standard plays a crucial role in the assessment of the mechanical properties of wood, supporting consistent quality control, research, and engineering applications in the wood products sector.
Testing the physical and mechanical properties of wood is essential for strength grading, structural analysis, and comparative studies of different wood species or treatments. By focusing on the compression parallel to grain, ISO 13061-17:2017 addresses a critical performance characteristic influencing the load-bearing capacity of timber in construction and design.
Key Topics
- Test Principle: The standard outlines procedures to apply a gradually increasing load to a small, clear wood specimen, parallel to the grain, until failure occurs. This allows for accurate determination of the ultimate compressive stress.
- Specimen Preparation: Guidelines include preparing rectangular wood samples with defined dimensions, ensuring consistent grain orientation, and conditioning to specific moisture contents.
- Apparatus Requirements: Lists the necessary equipment, such as precise testing machines, uniform loading devices, and moisture and density measurement instruments.
- Testing Procedures: Details steps for measuring specimen dimensions, applying loads, recording maximum force, and determining both moisture content and density following ISO 13061-1 and ISO 13061-2.
- Calculation of Results: Specifies formulas for calculating ultimate stress in N/mm² (MPa), with provision to adjust results to a standard 12% moisture content.
- Reporting: Requires comprehensive documentation of test methods, specimen details, results, and relevant conditions to ensure traceability and reproducibility.
Applications
ISO 13061-17:2017 is widely used in several domains:
- Quality Control in Timber Production: Ensures that wood products meet mechanical property requirements for safety and reliability.
- Research & Development: Facilitates comparative studies of different wood species, treatments, or preservation methods by providing standardized test methods.
- Structural Engineering: Supports the assessment of load-bearing timber elements where compressive strength parallel to the grain is a critical factor.
- Education and Training: Used in academic settings to teach standard wood testing methods and mechanical property evaluation.
- International Trade: Promotes uniformity in wood quality assessment, aiding in global market access and regulatory compliance.
By implementing ISO 13061-17:2017, organizations can achieve higher consistency in material testing, improve the reliability of timber structures, and adhere to internationally recognized best practices.
Related Standards
- ISO 3129: Wood - Sampling methods and general requirements for physical and mechanical testing of small clear wood
- ISO 13061-1: Physical and mechanical properties of wood - Test methods for small clear specimens - Part 1: Determination of moisture content for physical and mechanical tests
- ISO 13061-2: Physical and mechanical properties of wood - Test methods for small clear specimens - Part 2: Determination of density for physical and mechanical tests
- ISO 24294: Timber - Round and sawn timber - Vocabulary
Adopting ISO 13061-17:2017 in tandem with these related standards ensures a comprehensive, standardized approach to the evaluation of wood’s physical and mechanical properties, supporting both scientific accuracy and industry transparency.
Keywords: ISO 13061-17:2017, ultimate stress, compression parallel to grain, wood test methods, mechanical properties, small clear wood specimens, timber strength testing, wood standards, physical properties of wood, ISO wood testing, moisture content, wood density, timber quality control.
Open preview (PDF)Physical and mechanical properties of wood — Test methods for small clear wood specimens — Part 17: Determination of ultimate stress in compression parallel to grain
