Automatic release mechanism
A device that normally holds a door open, but closes it automatically if any one of the following occurs. • Smoke is detected by an automatic device of a suitable nature and quality in a suitable location. • A hand-operated switch, fitted in a suitable position, is operated. • The electricity supply to the device, apparatus or switch fails. • The fire alarm system, if any, is operated.
Approved Document B Volumes 1 and 2, Appendix A (page 133, page 144)
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Definitions are taken from Approved Document B (fire safety). Contains public sector information licensed under the Open Government Licence v3.0.
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