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The Z87+(plano lens) and Z87-2+(Rx lens) markings on safety glasses and goggles indicate that eyewear is compliant with ANSI Z87.1 High Impact and ANSI/ISEA Z87.1 industrial safety standard for eye protection. Safety eyewear meeting these criteria are used in a variety of industrial and personal applications.
Basically, the IBC will require all of the glass in the enclosure to meet the requirements of ANSI Z97.1 or CPSC 16 CFR Part 1201. This is glazing that is commonly referred to as safety glazing, and tempered glass is most commonly used to meet it. Also note that the glass in the hoistway doors must meet the more stringent Class A requirements of ANSI Z97.1 or Category II of CPSC 16 CFR Part 1201.