Fire Alarm design Considerations

Grades of automatic fire detection and warning systems as specified in BS 5839-6 (2004)

Grade A: a fire detection and fire alarm system that is designed and installed in accordance with the recommendations of BS 5839-1 (2002), except clauses relating to fire alarm audibility, fire alarm warnings for the hearing-impaired, standby supplies, manual call points and wireless fire alarm systems, which are replaced by part 6.

This comprises a fire system of electrically operated fire detection of smoke and/or heat detectors which are linked to a fire control panel.

The fire control panel must conform to current BS 5839-4 (or equivalent). In general the fire system must incorporate manual call points which should be located next to final exits, and, in larger multi-storey properties, on each landing. The fire alarm signal must achieve sound levels of not less than 65dB (A) in all accessible parts of the building and not less than 75dB (A) at all bed-heads when all doors are shut, to arouse sleeping persons.

In accordance with the RRO (Regulatory Reform Order) 2005, it is now law that a fire risk assessment is undertaken and the findings published.

This will highlight the importance of ensuring that a fire alarm maintenance procedure is in place, and the fire protection system is testing on a weekly basis.

Fire Systems Ltd a London based fire alarm company offers all types of fire alarm maintenance contracts.