Fire Detection In Ceiling Voids
L1 is designed to provide a warning as early as possible to include detection in all areas of the property and should therefore include detection in roof voids.
Fire detection in ceiling voids. 222d if the system category is such that automatic fire detection should be provided in any area that contains a horizontal void of 800 mm or more in height automatic fire detection should also be provided in the void. If the void is less than 1500mm in depth all such detection should be sited in the top 10 per cent or 125mm of void depth whichever is the greater. Fire in concealed spaces such as roof voids can be a killer. It is answered by select.
If it is a totally separation then you could have separated fire alarms but you must consider if the fire alarm operates will they be heard for persons to act. A person searching a zone for a fire in a non addressable fire system should not have to travel for more than 60m to identify the source of a fire. Q a of the day does this roof void need fire detection equipment. Edited september 18 2015 by tom.
This question of the day concerns a nursing home and whether its roof void needs fire detection equipment. Do roof voids need fire detection. In voids of more than 800mm in depth detection should be provided in the void. Bs5839 section 223 the sensing element of a heat detection thermistor device should not be less than 25mm below ceiling and not greater than 150mm below ceiling.
Is there a ceiling below the voids concealing them or are they used to provide light to the workplace and if there is a ceiling is it fire resisting. 223j ceiling obstructions such as structural beams deeper than 10 of the overall ceiling height should be treated as walls. If a room has detection and a void greater than 800 mm then the void needs detection. This article examines how to reduce the risk at the design stage and during construction.
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