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BS 7273-4:2015+A1:2021

BS 7273-4:2015+A1:2021

$198.66

Code of practice for the operation of fire protection measures – Actuation of release mechanisms for doors

Published By Publication Date Number of Pages
BSI 2021 62
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This part of BS 7273 gives recommendations for the design, installation, commissioning and 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 this part of BS 7273 applies, include any such arrangements that are designed in the event of fire to:

  1. release fire‑resisting doors that are normally held in the open position;

  2. unlock doors that are normally locked; or

  3. cause powered sliding doors to open.

This British Standard does not apply to electrically controlled systems that form part of a smoke venting system.

NOTE 1 Recommendations for the interface between these systems and a fire detection and fire alarm system are given in BS 7273‑6.

This part of BS 7273 does not generally apply to the equipment that holds, releases, locks or unlocks the doors, or that facilitates the opening of powered sliding doors.

NOTE 2 Recommendations are given, where appropriate, for the standards to which some of this equipment needs to conform.

This part of BS 7273 does not apply to products used within the fire detection and fire alarm system that initiate the signal to actuate the door locking or release mechanisms, nor to aspects of the fire detection and fire alarm system concerned with its primary function to give warning in the event of fire.

NOTE 3 Recommendations for the design, installation, commissioning and maintenance of fire detection and fire alarm systems are given in BS 5839‑1, which refers normatively to BS 7273 for the interface between a fire detection and fire alarm system and other fire protection systems and equipment.

The scope of this part of BS 7273 is shown diagrammatically in Figure 1.

Figure 1 Scope of BS 7273‑4

PDF Catalog

PDF Pages PDF Title
5 Foreword
7 Introduction
9 1 Scope
10 Figure 1 — Scope of BS 7273‑4
2 Normative references
11 3 Terms and definitions
15 4 Categories of actuation
16 4.1 Selection of category
17 4.2 Description of categories
18 Table 1 — Conditions under which the interface with door release mechanisms is fail‑safe
19 5 Exchange of information and definition of responsibilities
6 Variations from the recommendations of this standard
20 7 Methods of actuation
23 8 Mechanisms for unlocking and release of doors
8.1 General
8.2 Electrically held open fire doors
8.3 Electronically secured doors
24 8.4 Powered sliding doors
9 Interface design
25 9.1 General
9.2 Electronically secured doors or powered sliding doors
9.3 Electrically held‑open fire doors
26 10 Monitoring, integrity and reliability of actuation arrangements
27 11 Manual release controls
11.1 Manual release controls for self‑closing fire doors
11.2 Manual release controls for electronically secured doors and powered sliding doors
29 12 Special considerations for the design of any associated fire detection and fire alarm system
12.1 All fire detection and fire alarm systems
12.2 Systems that actuate release mechanisms for electrically held‑open fire doors
32 Figure 2 — Protection in corridors subdivided by electrically held open cross corridor fire doors
33 Figure 3 — Protection where a fire door between a corridor and a stairway is electrically held open
34 Figure 4 — Protection where a fire door between a room of limited size and a corridor or a stairway is electrically held‑open
12.3 Systems that actuate release mechanisms for electrically secured doors and powered sliding doors on means of escape
35 13 Power supplies
36 14 Cables, wiring and other interconnections
15 Acoustically‑actuated systems
37 16 Radio‑actuated systems
38 17 Electromagnetic compatibility
39 18 Electrical safety
19 Door signage
40 20 Commissioning
42 21 Maintenance
21.1 Routine testing
43 21.2 Inspection and servicing
44 21.3 Recommendations for inspection and test over a 12 month period
45 Annex A (informative)  Applications for mechanisms for unlocking and releasing doors
46 Annex B (normative)  Selection of category of actuation
47 Table B.1 — Selection of category of actuation for release of self‑closing fire doors
48 Table B.2 — Selection of category of actuation for release of electronically locked doors on means of escape from buildings
50 Table B.3 — Selection of category of actuation for release of powered sliding doors on means of escape
Annex C (informative)  Typical actuation arrangements for release mechanisms
51 Figure C.1 — Use of relays at fire alarm CIE to actuate release mechanisms
52 Figure C.2 — Use of addressable loop device to actuate release mechanisms
53 Figure C.3 — Acoustic actuation of release mechanisms
Figure C.4 — Acoustic actuation of release mechanisms
54 Figure C.5 — Combined acoustic and radio actuation of release mechanisms
Annex D (informative)  Example of a suitable sign for a manual release control
55 Figure D.1 — Example of a suitable sign for a manual release control
Annex E (informative)  The advantages and disadvantages of acoustic actuation of release mechanisms
56 Annex F (informative)  The advantages and disadvantages of radio actuation of release mechanisms
57 Annex G (informative)  Model commissioning certificate
58 Figure G.1 — Model commissioning certificate
59 Bibliography

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BS 7273-4:2015+A1:2021
$198.66