BS 7273-4 PDF

It replaces the version, which is superseded, and although the version is heading towards three years old, it is all too easy to forget which parts were updated. So for those of you who need a refresh, read on…. BS in a nutshell is about the operation and release of electronically controlled fire doors. It recommends how to actuate mechanisms that unlock, release or open doors in the event of fire in all buildings including dwellings except where stated. It provides 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.

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BS Code of practice for the operation of fire protection measures — part 4: Actuation of release mechanisms for doors was published on 30 June It replaces the version, which is superseded, and although the version is heading towards three years old, it is all too easy to forget which parts were updated.

So, for those of you who need a refresh, read on…. BS in a nutshell is about the operation and release of fire doors. It recommends how to actuate mechanisms that unlock, release or open doors in the event of fire in all buildings including dwellings except where stated. It provides 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 also enhances some of the recommendations of BS with regard to detector siting and spacing in certain categories of system. It is a very demanding standard that can be difficult to meet due to the different needs and requirements of different doors throughout the building. Which doors should be released?

How do you make the fire-alarm system communicate with the door-release mechanism? This can sometimes be made all the more complicated in bigger buildings with multiple storeys and a wide variety of doors. In addition, different buildings have different needs and each case needs to be treated individually. What might work for one building might not work for another, even if there are many similarities. There is also a conflict between two standards: what BS says may confuse your interpretation of BS So, if the design of the building calls for a category L1, L2, or L3 design, stick with BS and the guidance within.

Otherwise for category L4 or L5 systems, design the system with BS in mind. That said, this article is by no means a substitute for reading the standards and obtaining relevant training, but thankfully we are able to break this standard down into three quick tips to get you started, and the FIA also has a handy technical document on its website that will help summarise it too free to download from fia.

Is it going to unlock or just open? How will you get the door to fulfil its role as a fire door? Door-release mechanisms are typically one of three things. They could be electromagnetic door holders that release self-closing doors in an emergency; or electromagnetic locks that prevent unauthorised access but will still release in an emergency; or powered sliding doors that open in an emergency.

Take these into consideration when thinking about fire doors and their purposes. By identifying the category of door system, you can base your design for the alarm system on these factors.

Where and how you can use these different categories of door system depends a lot on the building and the environment you are working within. In some cases, it may be worth noting that enforcing authorities may not allow electronically secured doors, such as in school buildings where only the critical category of doors may be applied if permitted.

In addition, we have two technical documents that will help break down BS There is also a range of handy reference charts and diagrams to refer to so that you can find out how to space detectors in relation to the doors. As with all our technical documents, they are created by technical experts and FIA members who sit on a range of FIA councils.

These groups work to ensure that the information presented is the most accurate and up-to-date information available. For more information, go to www. Choose a Printed or Digital subscription to have full access to our website content. Subscribe here for FREE.

What you need to know about BS Home Articles What you need to know about BS So, for those of you who need a refresh, read on… BS in a nutshell is about the operation and release of fire doors. Standards can be difficult to interpret, especially if it seems that one standard conflicts with another. The problems with BS It is a very demanding standard that can be difficult to meet due to the different needs and requirements of different doors throughout the building.

Advice for working with BS Tip 1: Identify the type of door mechanism Is it going to unlock or just open? Tip 2: Identify the categories of the door systems By identifying the category of door system, you can base your design for the alarm system on these factors.

The FIA can offer support and guidance on Standards through our online Resource library, which is accessible free of charge, or via our training and qualifications classes. Share This.

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BS 7273: operation of fire protection measures

DRM is included at the request of the publisher, as it helps them protect their copyright by restricting file sharing. Visit FileOpen to see the full list. June Code of practice for the operation of fire protection measures. Actuation of release mechanisms for doors. April Code of practice for the operation of fire protection measures. Our policy towards the use of cookies Techstreet, a Clarivate Analytics brand, uses cookies to improve your online experience. They were placed on your computer when you launched this website.

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BSI, the business standards company has revised BS Code of Practice for the operation of fire protection measures — Part 4: Actuation of release mechanisms for doors. Fire doors are typically designed to be kept closed at all times so that fire and heat are contained and their spread minimized. This is achieved through use of well-engineered fire doors. This standard relates to the engineering of fire alarm systems and in particular mechanisms to interface with fire doors and secured fire exits. It addresses safety critical arrangements that enforcing authorities rely on to ensure a building can be evacuated safely — where fire doors are held open or exits secured which need to be released by the fire alarm system. It is vital that there is a common approach to fire alarm design with regard to these interfaces. Previously, a device local to the doors effectively switched the doors to fail safe mode and released electrically secured fire exits and closed fire doors held open on magnetic door retainers.

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