Fire Alarm System

PEES

Go through NFPA 72.

For a start please note that it is assumed that the detectors are to be provided for a building. Principally the following factors govern the spacing between the detectors:

- Height of the roof/ cavity (in case of false floor and false ceiling)

- No of air changes inside the area

Now a days multi criteria detectors are available . These detectors can be tuned to act as ionisation type, photoelectric type of heat type of detectors.

Remember that it is recommended to have an equal no. of ionisation and photoelectric detectors in a given area. Heat detectors are normally used where presence of gas during normal operation will cause malfunctioning of the detectors, eg in battery room.

Then their are other types of detectors suitable for various locations and applications.

Hope that gives you a goahead for further study.

British Standard 5839.

hi dear

i am fire fighting and plumbing engineer in one of the india's biggest shopping mall ( under constrution ) .. brother right now i am little bit busy after lunch i will mail u all the required material and also the design and drawing of the mall. what so ever guidence u want, if i have the same i will provide u

bye

So,...PEES,...where on the globe are you located?

but usually around 9meters distance between the two detectors can i have ur email address, i will send to you a pdf copy of the requirements...

hi bro my email is:-bawa333us@yahoo.com

please send me pdf copy of the requirements.

Thanks for response please note email for PDF file

peesconsult@hotmail.com

Welcome aboard! The answer depends on which country the work is done in. You already have responses citing NFPA (American) and British standards, and an offer of help from India, I'm sure there are others. All will be similar, none are guaranteed to be identical, and it's the little details that you need to be aware of. Knowing where you are working is critical...