This standard covers products used in connection with conventional exit devices or locks causing the doors to remain locked after releasing actuation for a predetermined length of time. Performance criteria are included for functional@ cycle@ operational@ fail-safe and overload requirements. Tests described in this Standard are performed under laboratory conditions. In actual usage@ results vary because of installation@ maintenance@ and environmental conditions.
A156.24-2012由BHMA - Builders Hardware Manufacturers Association Inc. 发布于 2012-01-01,并于 2018-06-15 实施。
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