MANUAL SYSTEMS:
Manual systems are suitable for small workplaces and involve the use of the following basic devices:
These devices are normally located on the walls of corridors, entrance halls and staircase landings, etc., where they are readily available to anyone who may have to raise an alarm. While these types of manual systems provide for an alarm over a limited area, operation of one of them is rarely adequate to give a general alarm throughout the premises. Also, as a person is required to operate them, a continuous alarm cannot be guaranteed for as long as may be necessary.
In order to raise a more general alarm it is also possible to use facilities which may already be installed in a building for other purposes – for example, a telephone or public address system. With automatic telephone systems, arrangements can be made for a particular dialling code to be reserved for reporting a fire to a person responsible for calling the fire brigade and sounding the general alarm. Alternatively it can be arranged that use of the code automatically sounds the general alarm.
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Manual systems are suitable for small workplaces and involve the use of the following basic devices:
- Rotary Gongs – which are sounded by turning a handle around the rim of the gong.
- Hand Strikers – for example, iron triangles suspended from a wall accompanied by a metal bar which is used to strike the triangle manually.
- Hand bells.
- Whistles.
- Air-horns.
These devices are normally located on the walls of corridors, entrance halls and staircase landings, etc., where they are readily available to anyone who may have to raise an alarm. While these types of manual systems provide for an alarm over a limited area, operation of one of them is rarely adequate to give a general alarm throughout the premises. Also, as a person is required to operate them, a continuous alarm cannot be guaranteed for as long as may be necessary.
In order to raise a more general alarm it is also possible to use facilities which may already be installed in a building for other purposes – for example, a telephone or public address system. With automatic telephone systems, arrangements can be made for a particular dialling code to be reserved for reporting a fire to a person responsible for calling the fire brigade and sounding the general alarm. Alternatively it can be arranged that use of the code automatically sounds the general alarm.
Safety Courses in Chennai | Nebosh Courses in Chennai | OHSAS 18001 | Apply Now !
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