Hold-open device - Revision history

Editor at 12:04, 10 November 2021

2021-11-10T12:04:22Z

← Older revision		Revision as of 12:04, 10 November 2021
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	Devices should have a manual release mechanism so that the doors can be manually closed if necessary.		Devices should have a manual release mechanism so that the doors can be manually closed if necessary.

−	Hold open devices should comply with BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors. This standard categorises products into three installation categories; Standard, Indirect & Critical	+	Hold open devices should comply with [https://shop.bsigroup.com/products/code-of-practice-for-the-operation-of-fire-protection-measures-actuation-of-release-mechanisms-for-doors-3 BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors]. This standard categorises products into three installation categories; Standard, Indirect & Critical

	Standard and Indirect installations should release the device upon;		Standard and Indirect installations should release the device upon;
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	* Means of escape.		* Means of escape.
	* Self-closing device.		* Self-closing device.
		+
		+	= External resources =
		+
		+	* BSI, [https://shop.bsigroup.com/products/code-of-practice-for-the-operation-of-fire-protection-measures-actuation-of-release-mechanisms-for-doors-3 Code of practice for the operation of fire protection measures - Actuation of release mechanisms for doors BS 7273-4:2015+A1:2021].

	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Health_and_safety_/_CDM]] [[Category:Products_/_components]]		[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Health_and_safety_/_CDM]] [[Category:Products_/_components]]

Editor at 12:02, 10 November 2021

2021-11-10T12:02:12Z

← Older revision		Revision as of 12:02, 10 November 2021
Line 18:		Line 18:
	Devices should have a manual release mechanism so that the doors can be manually closed if necessary.		Devices should have a manual release mechanism so that the doors can be manually closed if necessary.

−	Hold open devices should comply with BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors~~[https://shop~~.~~bsigroup.com/ProductDetail/?pid=000000000030289000 .]~~ This standard categorises products into three installation categories; Standard, Indirect & Critical	+	Hold open devices should comply with BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors. This standard categorises products into three installation categories; Standard, Indirect & Critical

	Standard and Indirect installations should release the device upon;		Standard and Indirect installations should release the device upon;

Editor at 12:00, 10 November 2021

2021-11-10T12:00:59Z

← Older revision		Revision as of 12:00, 10 November 2021
Line 18:		Line 18:
	Devices should have a manual release mechanism so that the doors can be manually closed if necessary.		Devices should have a manual release mechanism so that the doors can be manually closed if necessary.

−	Hold open devices should comply with ~~[https://shop.bsigroup.com/ProductDetail/?pid=000000000030289000~~ BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors.] This standard ~~categorizes~~ products into three installation categories; Standard, Indirect & Critical	+	Hold open devices should comply with BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors[https://shop.bsigroup.com/ProductDetail/?pid=000000000030289000 .] This standard categorises products into three installation categories; Standard, Indirect & Critical

	Standard and Indirect installations should release the device upon;		Standard and Indirect installations should release the device upon;
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	Current guidance restricts the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes.		Current guidance restricts the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes.

−	~~= Find out more =~~	+	= Related articles on Designing Buildings =
−		+
−	=== Related articles on Designing Buildings ~~Wiki ==~~=	+

	* Automatic fire detection and alarm systems, an introductory guide to components and systems BR 510.		* Automatic fire detection and alarm systems, an introductory guide to components and systems BR 510.

Pete Davies at 09:02, 20 November 2020

2020-11-20T09:02:52Z

← Older revision		Revision as of 09:02, 20 November 2020
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	Devices should have a manual release mechanism so that the doors can be manually closed if necessary.		Devices should have a manual release mechanism so that the doors can be manually closed if necessary.

−	Hold open devices should comply with [https://~~www~~.~~fia.uk~~.com/~~news~~/~~blogs/what-you-need-to-know-about-bs-7273-4-2015.html~~ BS 7273-4:2015] Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors. This standard categorizes products into three installation categories; Standard, Indirect & Critical	+	Hold open devices should comply with [https://shop.bsigroup.com/ProductDetail/?pid=000000000030289000 BS 7273-4:2015 Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors.] This standard categorizes products into three installation categories; Standard, Indirect & Critical

	Standard and Indirect installations should release the device upon;		Standard and Indirect installations should release the device upon;

Pete Davies at 09:01, 20 November 2020

2020-11-20T09:01:23Z

← Older revision		Revision as of 09:01, 20 November 2020
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−	A hold-open device is a mechanism that enables doors to be held open ~~electronically~~.	+	A hold-open device is a mechanism that enables fire doors to be held open safely and is commonly used to help deal with issues of fire door wedging or improving accessibility.

−	~~The can be fitted to fire doors under certain circumstances.~~ Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.	+	Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations, it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.

−	A hold-open device can be installed to hold the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door closes ~~automatically~~.	+	A hold-open device can be installed to hold the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door closes via the closing force of a ‘door closer’.

−	A hold-open device comprises:	+	The operation of a hold-open device comprises:

−	* A trigger mechanism ~~which~~ processes the signals issued by the fire alarm.	+	* A trigger mechanism that processes the signals issued by the fire alarm.
	* A fire alarm.		* A fire alarm.
−	* A hold-open mechanism – ~~typically~~ a ~~door closer with electro-magnetic hold-open~~.	+	* A hold-open mechanism – such as a hardwired electromagnet or suitable acoustic device.
−	* ~~A power~~ supply.	+	* Power supply - mains supplied or battery.

−	In the event of a fire, the ~~electro-magnetic~~ hold-open ~~de-energises~~, allowing the door to close.	+	In the event of a fire, the trigger mechanism releases the hold-open device, allowing the door to close.

	The device can either be an attachment to the door or can be incorporated into the door closer. In the case of ‘delayed-action closers’, they are often installed as separate wall-mounted devices.		The device can either be an attachment to the door or can be incorporated into the door closer. In the case of ‘delayed-action closers’, they are often installed as separate wall-mounted devices.

−	~~Fire risk assessment and guidance restricts~~ the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes. ~~The door must close in the event of:~~	+	Devices should have a manual release mechanism so that the doors can be manually closed if necessary.

−	* Activation of a smoke ~~detector~~.	+	Hold open devices should comply with [https://www.fia.uk.com/news/blogs/what-you-need-to-know-about-bs-7273-4-2015.html BS 7273-4:2015] Code of practice for the operation of fire protection measures – part 4: Actuation of release mechanisms for doors. This standard categorizes products into three installation categories; Standard, Indirect & Critical
		+
		+	Standard and Indirect installations should release the device upon;
		+
		+	* Activation of a fire alarm via smoke, heat, or other fire detection equipment.
	* Manual activation of a fire alarm.		* Manual activation of a fire alarm.
−	* ~~Any~~ failure of the alarm system.	+	* Mechanical fault (fail-safe)
−	* Any electrical power failure.	+	* Loss of power to the device (fail-safe)
		+
		+	Critical installations should release upon the above conditions as well as upon any failure of the alarm system.

−	~~A manual release push~~-~~button must also be provided so that the doors can be manually closed if necessary. It should typically be coloured red, with ‘Close door’ visibly displayed~~, and ~~positioned in the immediate vicinity of the door, i.e. not concealed when the door~~ is in the ~~hold-open position~~.	+	Current guidance restricts the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes.

	= Find out more =		= Find out more =

Designing Buildings at 08:18, 2 November 2020

2020-11-02T08:18:05Z

← Older revision		Revision as of 08:18, 2 November 2020
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	* Self-closing device.		* Self-closing device.

−	[[Category:~~Health_and_safety_/_CDM~~]] [[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Health_and_safety_/_CDM]] [[Category:Products_/_components]]

Designing Buildings at 08:09, 13 September 2017

2017-09-13T08:09:21Z

← Older revision		Revision as of 08:09, 13 September 2017
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−	A hold-open device is a mechanism that enables ~~fire~~ doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.	+	A hold-open device is a mechanism that enables doors to be held open electronically.

−	~~A hold-open device~~ can be ~~installed that holds the door leaves in the open position until they~~ are ~~released, either manually or~~ in ~~the event~~ of a fire, ~~at which point~~ the ~~door releases~~ and ~~closes automatically~~.	+	The can be fitted to fire doors under certain circumstances. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.

−	A hold-open device ~~comprises~~ the ~~following:~~	+	A hold-open device can be installed to hold the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door closes automatically.

−	* ~~Trigger~~ mechanism which processes the signals issued by the fire alarm.	+	A hold-open device comprises:
−	* ~~Fire~~ alarm.	+
−	* ~~Hold~~-open mechanism – typically a door closer with electro-magnetic hold-open.	+	* A trigger mechanism which processes the signals issued by the fire alarm.
−	* ~~Power~~ supply.	+	* A fire alarm.
		+	* A hold-open mechanism – typically a door closer with electro-magnetic hold-open.
		+	* A power supply.

	In the event of a fire, the electro-magnetic hold-open de-energises, allowing the door to close.		In the event of a fire, the electro-magnetic hold-open de-energises, allowing the door to close.

−	The device can either be an attachment to the door, incorporated into the door closer. In the case of ‘delayed-action closers’~~, where the closing of the door is delayed to allow more time to pass through~~, they are often installed as separate wall-mounted devices.	+	The device can either be an attachment to the door or can be incorporated into the door closer. In the case of ‘delayed-action closers’, they are often installed as separate wall-mounted devices.

−	Fire risk assessment and guidance ~~restrict~~ the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes. The door must close in the event of ~~the following~~:	+	Fire risk assessment and guidance restricts the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes. The door must close in the event of:

−	* Activation of ~~the~~ smoke detector.	+	* Activation of a smoke detector.
−	* Manual activation of ~~the~~ fire alarm.	+	* Manual activation of a fire alarm.
	* Any failure of the alarm system.		* Any failure of the alarm system.
	* Any electrical power failure.		* Any electrical power failure.

−	A manual release push-button must also be provided ~~when using hold-open devices,~~ so that the doors can be manually ~~opened~~ if necessary. It should typically be coloured red, with ‘Close door’ visibly displayed, and be positioned in the immediate vicinity of the door, i.e. not concealed when the door is in the hold-open position.	+	A manual release push-button must also be provided so that the doors can be manually closed if necessary. It should typically be coloured red, with ‘Close door’ visibly displayed, and positioned in the immediate vicinity of the door, i.e. not concealed when the door is in the hold-open position.

	= Find out more =		= Find out more =
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	* Self-closing device.		* Self-closing device.

−	[[Category:Health_and_safety_/_CDM]] [[Category:Products_/_components]]	+	[[Category:Health_and_safety_/_CDM]] [[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Editor at 12:31, 5 September 2017

2017-09-05T12:31:53Z

← Older revision		Revision as of 12:31, 5 September 2017
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	A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.		A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.

−	A hold-open device can be installed that ~~hold~~ the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door releases and closes automatically.	+	A hold-open device can be installed that holds the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door releases and closes automatically.

	A hold-open device comprises the following:		A hold-open device comprises the following:

Editor at 12:31, 5 September 2017

2017-09-05T12:31:24Z

← Older revision		Revision as of 12:31, 5 September 2017
Line 1:		Line 1:
−	A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed at all time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.	+	A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed all the time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.

	A hold-open device can be installed that hold the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door releases and closes automatically.		A hold-open device can be installed that hold the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door releases and closes automatically.

Editor: Created page with "A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing th..."

2017-09-05T12:30:58Z

Created page with "A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing th..."

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A hold-open device is a mechanism that enables fire doors to be held open electronically. Fire doors are important in terms of providing proper fire separation, and preventing the spread of fire and smoke, but in some situations it may be inconvenient or undesirable for fire doors to be closed at all time. Closed doors can negatively impact upon the inhabitants, such as in a care home or school, or can present hazards where there is busy traffic circulation.

A hold-open device can be installed that hold the door leaves in the open position until they are released, either manually or in the event of a fire, at which point the door releases and closes automatically.

A hold-open device comprises the following:

* Trigger mechanism which processes the signals issued by the fire alarm.
* Fire alarm.
* Hold-open mechanism – typically a door closer with electro-magnetic hold-open.
* Power supply.

In the event of a fire, the electro-magnetic hold-open de-energises, allowing the door to close.

The device can either be an attachment to the door, incorporated into the door closer. In the case of ‘delayed-action closers’, where the closing of the door is delayed to allow more time to pass through, they are often installed as separate wall-mounted devices.

Fire risk assessment and guidance restrict the use of hold-open devices to applications where there is an automatic fire detection and warning system which incorporates smoke detectors, and which is designed to protect the building’s escape routes. The door must close in the event of the following:

* Activation of the smoke detector.
* Manual activation of the fire alarm.
* Any failure of the alarm system.
* Any electrical power failure.

A manual release push-button must also be provided when using hold-open devices, so that the doors can be manually opened if necessary. It should typically be coloured red, with ‘Close door’ visibly displayed, and be positioned in the immediate vicinity of the door, i.e. not concealed when the door is in the hold-open position.

= Find out more =

=== Related articles on Designing Buildings Wiki ===

* Automatic fire detection and alarm systems, an introductory guide to components and systems BR 510.
* Automatic release mechanism.
* Door closer.
* Doors.
* Fire detection and alarm systems.
* Fire door.
* Fire Door Inspection Scheme.
* Fire safety design.
* Fire stopping.
* Free-swing door closer.
* Installing fire doors and doorsets (GG 86).
* Means of escape.
* Self-closing device.

[[Category:Health_and_safety_/_CDM]] [[Category:Products_/_components]]