BS EN 1155 – Electrically Powered Hold-Open Devices

European and British standardisation for separate hold-open devices and for hold-open mechanisms incorporated in a door closer
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BS EN 1155:1997 – Electrically Powered Hold-Open Devices

This European standard specifies requirements for separate hold-open devices and also for hold-open mechanisms incorporated in a door closer. Electrically powered hold-open devices for swing doors manufactured according to this European standard can hold a swing door at a fixed position or can allow the door to swing freely. In each case interruption of the electrical supply will cause the controlled door to close positively.

BS EN 1155:1997 classifies door furniture by using a 6-digit coding system.

Digit 1 – Category of use

Only one category of use is identified for electrically powered hold-open devices:
Grade 3: for doors for use by the public, and others, with little incentive to take care, i.e. where there is some chance of misuse of the door

Digit 2 – Number of test cycles

Two test durations are identified for devices manufactured to this European standard:
Grade 5: 50,000 test cycles, for all electrically powered hold-open devices
Grade 8: 500,000 test cycles, for all electrically powered hold-open and free-swing door closers and devices that contain operating arms

Digit 3 – Test door mass/size

Five door mass grades and related hold-open power sizes are identified according to Table 1 of this European standard.

Hold-open Power SizeRecommended Door Leaf Width max. mm kgTest Door Mass (kg)
395060
41,10080
51,250100
61,400120
71,600160

Digit 4 – Fire resistance

Only one grade of fire resistance is identified for electrically powered hold-open devices manufactured to this European standard:
Grade 1: suitable for use on fire/smoke door assemblies subject to satisfactory assessment of the contribution of the electrically powered hold-open device to the fire resistance of specified fire/smoke door assemblies

Digit 5 – Safety

Electrically powered hold-open devices are required to satisfy the Essential Requirement of safety in use. Therefore only grade 1 is identified

Digit 6 – Corrosion resistance

Five grades of corrosion resistance are identified in accordance with BS EN 1670:2007:
Grade 0: no defined corrosion resistance
Grade 1: mild resistance
Grade 2: moderate resistance
Grade 3: high resistance
Grade 4: very high resistance

Source: Door and Hardware Federation (DHF) Best Practise Guide – Electrically Powered Hold Open Devices for Swing Doors – BS EN 1155

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