Last edited 05 Sep 2017

Automatic release mechanism

To help develop this article, click ‘Edit this article’ above.

Approved document B, Fire Safety, Volume 1 Dwelling houses, defines an automatic release mechanism as:

A device which will allow a door held open by it to close automatically in the event of each or any one of the following:

  • detection of smoke by automatic apparatus suitable in nature, quality and location;
  • operation of a hand-operated switch fitted in a suitable position;
  • failure of electricity supply to the device, apparatus or switch;
  • operation of the fire alarm system if any.

[edit] Find out more

[edit] Related articles on Designing Buildings Wiki