Overview
ISO 22762-3:2018 - Elastomeric seismic-protection isolators - Part 3: Applications for buildings - Specifications defines the minimum requirements and test methods for elastomeric seismic isolators and the rubber compounds used to make them. The standard applies to multilayer isolators (alternating elastomeric layers and reinforcing steel plates) that are installed between a building’s superstructure and substructure to provide seismic isolation, reduce transmitted ground motion and add damping capacity.
Key topics and requirements
ISO 22762-3 covers the full specification lifecycle for elastomeric seismic isolators used in buildings, including:
- Classification and construction - types by geometry, connection detail and performance tolerance.
- Performance requirements - compressive stiffness, shear stiffness, equivalent damping ratio, shear displacement capacity and tensile properties.
- Material requirements - rubber physical and ageing properties, hardness, ozone resistance and recommended minimum properties for rubber compounds.
- Testing and verification - type tests, routine tests and detailed test methods for compressive, shear and tensile behaviour (see Annexes E–F).
- Design rules - shape factors, calculation of compressive and shear behaviour, buckling and stability at large deformations.
- Manufacturing tolerances and dimensional control - plan dimensions, thickness, flatness, offsets and flange tolerances.
- Component requirements - reinforcing steel plate specifications, flange design and lead material requirements for lead-rubber bearings (LRB).
- Marking, labelling and quality assurance - required documentation, labelling examples and QA practices.
Applications and practical use
ISO 22762-3 is intended for practical application in the seismic design, manufacture and verification of building isolation systems. Typical applications include:
- New building designs where seismic isolation is required to reduce earthquake loads on the superstructure.
- Retrofitting and seismic upgrade projects that incorporate base isolators.
- Manufacturer quality control and product certification of elastomeric isolators.
- Laboratory testing protocols and acceptance criteria for suppliers and independent testing bodies.
Using ISO 22762-3 helps ensure predictable isolator performance (shear and compressive response, durability and fatigue), consistent manufacturing tolerances and traceable test evidence for building approvals.
Who should use this standard
- Structural and seismic engineers specifying isolation solutions
- Bridge and building product manufacturers (elastomeric isolators)
- Test laboratories and certification bodies
- Procurement teams, building authorities and code developers
Related standards
- ISO 22762 series (other parts) - Part 2 covers isolators for bridges; Part 1 and related documents provide general principles and complementary test methods. Consult the ISO catalogue for the complete series.