Overview
ISO/TR 22762-7:2024 - Elastomeric seismic-protection isolators - Part 7 explains how the ISO 22762 series relates to the design and testing of seismic isolation systems and to national seismic codes. The Technical Report clarifies terminology, maps ISO test categories to common code requirements (using ASCE/SEI 7-22 as an illustrative example), and provides guidance for structural engineers, manufacturers and testing laboratories on applying ISO requirements in practice.
Key topics and technical requirements
- Scope and purpose: Explains relationships between ISO 22762 parts and seismic-code design/testing requirements for elastomeric isolators (rubber bearings such as HDR, LRB and LNR).
- Terms and symbols: Defines critical terms and symbols used across ISO 22762 (e.g., shear stiffness K, equivalent damping heq, characteristic strength Qd, design compressive stress σ0, design shear strain γ0).
- Testing categories:
- Qualification tests / Type tests - manufacturer-conducted tests submitted for approval.
- Prototype tests / Type tests - project-specific verification of designed isolators.
- Production tests / Routine tests - factory quality control and pre-shipment verification.
- Correspondence with seismic codes: Matches seismic-code terminology and test requirements to ISO 22762 definitions and procedures; highlights minor differences in property definitions and test parameters.
- Property modification factors: Guidance on determining factors that account for temperature, rate-of-loading, manufacturing variations, ageing and environmental exposure.
- Informative annexes: Practical tables and examples - comparisons between ISO 22762-6 and EN 15129, sample test data for prototype testing, and examples for calculating property modification factors.
Practical applications and primary users
Who uses ISO/TR 22762-7:2024 and why:
- Structural engineers - interpret ISO isolator test results and map them to national seismic-code requirements when designing seismically isolated buildings.
- Manufacturers - understand which ISO tests satisfy code-specified qualification, prototype and production test demands.
- Testing laboratories - prepare test programs that align ISO methods with seismic-code expectations.
- Code authorities and procurement teams - evaluate manufacturer submissions and ensure isolator performance claims meet code-driven design demands.
Practical uses include preparing bid documents, specifying isolator performance for projects, approving manufacturer type-test data, and ensuring consistent translation of ISO test outcomes to code-required design parameters.
Related standards
- ISO 22762 series (multiple parts covering material, type, production and test methods) - ISO/TR 22762-7 explains how these parts relate to design and testing under national seismic codes.
- Informative comparison with EN 15129 and practical examples referencing ASCE/SEI 7-22 are included to aid international application.