Overview
ISO 10984-2:2009 - Timber structures - Dowel-type fasteners - Part 2: Determination of embedding strength - is an international standard developed by ISO Technical Committee 165 (Timber structures). This part of ISO 10984 specifies laboratory methods for determining the embedding strength of solid timber, glued laminated timber, and wood-based sheet products when used with dowel-type fasteners such as nails, bolts, dowels, and screws. Embedding strength is a key parameter for evaluating the compressive resistance of wood materials under mechanical fasteners, crucial for the safety and performance of timber structures.
Key Topics
- Embedding Strength Measurement: Defines procedures for quantifying the average compressive stress at maximum load, applied perpendicularly to the axis of a dowel-type fastener embedded in timber or wood-based products.
- Test Methods and Conditions: Specifies step-by-step methods for preparing test pieces, applying loads (in either compression or tension), and calibrating test apparatus to ensure accurate, repeatable results.
- Specimen Preparation: Provides requirements for dimensions, conditioning, and installation of fasteners to replicate real-world conditions in laboratory testing.
- Load Application and Recording: Details how load and displacement should be measured, including procedures for both pre-loading and main loading cycles.
- Calculations and Reporting: Outlines formulas for embedding strength, foundation modulus, and other mechanical properties; provides guidance for test reporting, including specimen details and environmental conditions.
Applications
ISO 10984-2:2009 is invaluable for:
- Timber Structure Design and Engineering: Enables structural engineers and designers to assess joint capacity and predict the behavior of timber connections under load, improving safety and performance.
- Product Testing and Quality Control: Supports laboratories, manufacturers, and quality assurance teams in evaluating nail, bolt, and dowel performance in various wood materials.
- Material Research and Development: Guides researchers in comparing the compressive strength of different wood species, engineered wood products, and composite panels when combined with mechanical fasteners.
- Standards Compliance Verification: Assists construction professionals and project managers in verifying that timber fastener joints comply with international and national building standards.
- Moisture and Density Analysis: Provides methods to correlate moisture content and density of wood materials with embedding strength, which is essential for product selection and environmental adaptation.
Related Standards
For comprehensive evaluation and international harmonization, the following standards are closely connected to ISO 10984-2:2009:
- ISO 10984-1: Timber structures - Dowel-type fasteners - Part 1: Determination of yield moment (focuses on the moment capacity of fasteners).
- EN 383: Timber structures - Test methods - Determination of embedment strength and foundation values for dowel type fasteners (European standard that influences ISO 10984-2 methods).
- ASTM D5764: Standard Test Method for Evaluating Dowel-Bearing Strength of Wood and Wood-Based Products (provides American test methods for similar applications).
- ISO 3130: Wood - Determination of moisture content for physical and mechanical tests.
- ISO 3131: Wood - Determination of density for physical and mechanical tests.
Conclusion
ISO 10984-2:2009 is an essential standard for the determination of embedding strength in dowel-type fastened timber structures. With clear laboratory procedures and guidelines for reporting, it assists professionals across structural engineering, construction, testing, and research sectors to ensure reliable performance and compliance in timber construction. Integrating the requirements of this standard enhances both the safety and efficiency of wooden joints in modern building applications.