A hold-open device is a system of devices or device combinations suitable for the controlled disabling of the function of closing devices. Hold-open devices may be used on fire doors, smoke control doors and other closures that meet the regulatory requirement of 'self-closing'. A hold-open device consists of at least a fire alarm, a trigger mechanism, a hold-open mechanism, a power supply, a manual trigger button and safety devices, where applicable.

Regulatory framework

For hold-open devices, general construction technique permits (aBG) are granted, which serve in particular to verify the compatibility of the devices/device combinations.

For the individual devices of the hold-open device, declarations of performance in accordance with Regulation (EU) No 305/2011 or a confirmation of conformity in accordance with the Building Codes of the federal states is required. Relevant standards in this work area include:

• Smoke detectors: DIN EN 54-7
• Heat detectors: DIN EN 54-5
• Power supply: DIN EN 54-4
• Components using radio links: DIN EN 54-25
• Hold-open mechanisms for swing doors: DIN EN 1155
• Swing door operators: DIN 18263-4

For devices/device combinations that are not covered by these standards, DIBt grants national technical approvals (abZ).

If a hold-open device is applied in combination with a conveyor system, it must be verified that it functions properly in interaction with the closure and the conveyor system (including testing of any connected sensors for monitoring the closing area) after operation-ready installation of the hold-open device on site. This acceptance test must be carried out by an inspection body in accordance with Part V, no. 11 of the Directory of recognised testing laboratories, inspection and certification bodies under the Building Codes of the federal states (PÜZ-Verzeichnis, linked on the right).