BS 7273-4:2007

BS 7273-4:2007 gives recommendations for:

• design
• installation
• commissioning
• maintenance

of electrical control arrangements for actuation of mechanisms that unlock, release or open doors in the event of fire. It applies to all aspects of the interface between these mechanisms and a fire detection and fire alarm system, including interfaces that incorporate acoustic coupling and radio transmission. It does not recommend whether the above mechanisms should, or should not, be used in any given premises, or in any particular circumstances.

The interface arrangements to which BS7273-4 applies include any such arrangements that are designed to release, in the event of fire, fire-resisting doors and shutters that are normally held in the open position, or to unlock doors that are normally locked, or to cause powered sliding doors to open. BS 7273-4 does not apply to electrically controlled systems that form part of a smoke venting system.

Contents of BS7273-4

1. Foreword
2. Introduction
3. Scope
4. Normative references
5. Terms and definitions
6. Applications for mechanisms for unlocking and release of doors
7. Categories of actuation
8. Exchange of information and definition of responsibilities
9. Variations from the recommendations of this standard
10. Methods of actuation
11. Mechanisms for unlocking and release of doors
12. System design
13. Monitoring, integrity and reliability of actuation arrangements
14. Manual release controls
15. Special considerations for the design of any associated fire detection and fire alarm system
16. Power supplies
17. Cables, wiring and other interconnections
18. Acoustically-actuated systems
19. Radio-actuated systems
20. Electromagnetic compatibility
21. Electrical safety
22. Door signage
23. Commissioning
24. Maintenance
     

Annexes
Annex A (informative) Choice of appropriate category of actuation
Annex B (informative) Typical actuation arrangements for release mechanisms
Annex C (informative) Example of a suitable sign for a manual release control
Annex D (informative) Model commissioning certificate
Bibliography

List of figures
Figure 1 – Scope of this part of BS 7273
Figure 2 – Pictogram for a manual release control
Figure 3 – Protection in corridors subdivided by electrically held-open fire doors
Figure 4 – Protection where a fire door between a corridor and a stairway is electrically held-open
Figure 5 – Protection where a fire door between a room of limited size and a corridor or a stairway is electrically held-open
Figure 6 – Protection where a fire door between a large room or open plan area and a corridor or a stairway is electrically held-open
Figure B.1 – Use of relays at fire alarm CIE to actuate release mechanisms
Figure B.2 – Use of addressable loop device to actuate release mechanisms
Figure B.3 – Acoustic actuation of release mechanisms
Figure B.4 – Radio actuation of release mechanisms
Figure B.5 – Combined acoustic and radio actuation of release mechanisms
Figure C.1 – Example of a suitable sign for a manual release control
Figure D.1 – Model commissioning certificate 

List of tables
Table A.1 – Choice of appropriate category of actuation for release of self-closing fire doors
Table A.2 – Choice of appropriate category of actuation for release of electronically locked doors on means of escape
Table A.3 – Choice of appropriate category of actuation for release of powered sliding doors on means of escape