Fire Alarm Smoke Layout for Industrial Ceiling

Can you get your hands on a copy of NFPA 72? That should be informative.

Not certain, but I think all of The Great White North follows NFPA.

You have selected equipment already?

If you've lots of questions to ask I'm afraid you've got a lot of reading to do!
Given your attitude in past postings how can you expect anyone to go out of their way to do your work for you?

Sorry Tony, thats wasn't my thought. More of a guiding hand. Sorry to offend you. God bless

I like your thinking. I don't know whether the various fire codes address the trapping of smoke in "pockets" such that it could accumulate without being detected by a sensor one or more "pockets" removed. Interesting question.

I found an answer in CAN/ULC S524-6

Simplified if the "I" beam is greater then x depth from the ceiling, each pocket acts as a seperate zone for smoke detectors except if it is less then x depth, at the point derating on spacing must occur to compensate.

contact the manufactor of your smoke or heat detector. they have engineres that will tell you by E-mail or by mail of where and how many. if not, try other manufactors or a local fire alarm company who will design, install and make the insurance company happy that a handy many did not do it. local fire building codes will give you information needed. buy the fire code book for commucial building. your beams are so far down from the ceiling, i believe that, yes one in each box. how long are they that more thab one might be needed? hot spots, smoke, etc. have to be factored in. there are dectors if the heat rises to fast, fire. others that look for smoke, some a set temp.