Requirements of Elastomeric Isolators for Seismic Protection of Bridges and Buildings Specified in ISO 22762

Since the year 2000, the ISO standard of elastomeric isolators for buildings and bridges has been under development by the technical-committee 45/sub-committee 4/working group 9, of International Organization of Standardization (ISO/TC45/SC4/WG9). Through five international meetings in Malaysia (2000), India (2001), Japan (2002), Great Britain (2003), and Germany (2004), the ISO standard for elastomeric isolators has been completed and will be published during 2005 as ISO 22762. The standard consists of three parts: Part 1- Test Methods, Part 2- Application for Bridges-Specifications, and Part 3- Application for Buildings-Specifications. Part 2 and Part 3 are the product specifications. Among many items in the product specifications, "Requirements" is considered as one of the most important and influential. These consist of performance requirements for the isolators and material requirements for the rubber. The performance requirements, and corresponding tolerance specified for isolators include compression, compression-shear , and ultimate 1 property characteristics. In this paper, a summary of the isolator requirements in the standard is presented.