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Fire Alarm Guidelines

In some simple, open plan, single storey premises, a fire may be obvious to everyone as soon as it starts. In these cases where the number and position of exits and the travel distance to them is adequate, a simple shout of ‘fire’ or a simple manually operated device, such as a gong, whistle or air horn that can be heard by everybody when operated from any single point within the building, maybe all that is needed. Where a simple shout or manually operated device is not adequate, it is likely that an electrical fire warning system will be required.

In more complex premises, particularly those with more than one floor, where an alarm given from any single point is unlikely to be heard throughout the building, an electrical system incorporating sounders and manually operated call points (break glass boxes) is likely to be required. This type of system is likely to be acceptable where all parts of the building are occupied at the same time and it is unlikely that a fire could start without somebody noticing it quickly. However, where there are unoccupied areas, or common corridors and circulation spaces in multi-occupied premises, in which a fire could develop to the extent that escape routes could be affected before the fire is discovered, automatic fire detection maybe necessary.

The uses of these systems may also be risk dependant, e.g. a small factory or warehouse which handles, manufactures, stores or uses low flash point or highly flammable hazardous substances might also need an automatic fire detection system.

You may need to consider special arrangements for times when people are working alone, are disabled, or when your normal occupancy patterns are different, e.g. when maintenance staff or other contractors are working at the weekend.

In large or complex premises, particularly those accommodating large amounts of people, it is likely that a more sophisticated form of warning and evacuation, possibly phased, should be provided.

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