Beam Pockets

[AAEB]

Good Day!

What is the best alternative to heat detectors in basement parking? We have a recent project in where the beam depth is 700mm and spaced 3500mm center to center???

thanks,
AAEB

 

[dhalleron]

If using the National Fire Alarm Code NFPA 72, each pocket would need to be treated as a separate space if using heat detectors. So probably one heat detector in each pocket depending on ceiling height.

Is there a sprinkler system? If so, then you may not need heat detection.

It's possible they go by a different code in your country.

 

[jumper]

If you wish to see NFPA 72 and others you can go here, get a free account, and look at them.

http://www.nfpa.org/aboutthecodes/list_of_codes_and_standards.asp

I believe the section for this in NFPA 72 is 17.6.3.3 on page 91.

Sections that have an * have additional information in Annex A.

For the above section I mentioned, it is found on page 203 in annex A.

 

[steve66]

Would some type of linear detector work better??

http://www.protectowire.com/index.htm

Not sure if this is listed for fire alarm applications.

 

[gadfly56]

Good Day!

What is the best alternative to heat detectors in basement parking? We have a recent project in where the beam depth is 700mm and spaced 3500mm center to center???

thanks,
AAEB

If the beam depth is more than 0.1 of the floor to ceiling height, AND the beam spacing is more than 0.4 of the floor to ceiling height, then a detector is required in the pocket. Assuming of course that you are using NFPA 72, 2007 or later.

steve66's suggestion regarding Protectowire or other linear detection product is good. And they are listed for fire alarm.