ISO/TR 18267:2013 PDF

Overview

ISO/TR 18267:2013 - Timber structures - Review of design standards is a Technical Report produced by ISO/TC 165 that documents a systematic review of existing national and international design standards relevant to structural timber. Its purpose is to assess how an ISO International Standard for the design of timber structures might be developed and to determine whether development should be initiated. The report compiles findings, considerations and options for future ISO work rather than prescribing new design rules.

Key topics covered

The report reviews and summarizes the technical and procedural issues that affect international harmonization of timber design standards. Major topics include:

• Basis for design - discussion of design philosophies (e.g., Limit States Design) and how reliability and safety factors are treated at international vs. national levels.
• Scope and limitations - intended audiences, geometry and application limits, and when simplification or detailed engineering is appropriate.
• Standard or guide - normative versus advisory language, and the balance between mandatory requirements and guidance.
• Rules-based vs engineered approach - pros and cons of prescriptive rules for non-engineering audiences versus engineered calculation methods for professional use.
• Material specifications - issues in defining timber product properties, referencing material and testing standards, and handling proprietary products.
• Load provisions - the report emphasizes that load requirements are typically national code matters and discusses ways an international design standard can remain compatible.
• Assemblies, construction practice and commentary - treatment of connections, composite elements, construction methods and explanatory guidance.
• Relationship to national standards and other ISO structural documents - analysis of harmonization challenges and precedents.
• Annexes - factors considered by ISO/TC 165, an overview of existing ISO structural design documents, and an outline for a Basic Level Standard.

Practical applications - who should use it

ISO/TR 18267:2013 is useful as a reference and planning document for:

• Standards committees and regulators assessing the feasibility of an international timber design standard.
• Structural engineers and consultants who need context on international harmonization issues and comparative approaches to timber design.
• Manufacturers and product developers seeking how material specifications and proprietary products might be referenced in future standards.
• Researchers and educators studying best practices in structural timber standardization and international code alignment.

Related standards

The report reviews and references existing ISO structural design documents as context, including:

• ISO/TR 11069:1995 (Aluminium structures)
• ISO 10721-1:1997 (Steel structures)
• ISO 9652-2:2000 (Masonry)
• ISO 15673:2005 (Concrete guidelines)
• ISO 22156:2004 (Bamboo Structural Design)

ISO/TR 18267:2013 serves as a practical roadmap for stakeholders interested in the development or adoption of an international timber design standard, clarifying technical themes, adoption barriers and options for harmonized structural timber design.