Where is Detection for a 5-Level Deluge System?

11/20/2024

For a deluge system with pilot sprinkler detectors in a column (5 levels), where is the pilot line required?

At what levels do we need detection?

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4 Comments

Dan Wilder

11/20/2024 07:37:18 am

I'm sure there may be some differences pending which NFPA and application is your guiding standard but 13-19' Ed Section 8.10 has all this info. There may be MFG specific requirements to comply with as well.

Other NFPA's like 15 & 214 have similar requirements.

Glenn Berger

11/20/2024 08:34:50 am

Need a sketch concerning the floor openings around the columns. As a start I would provide detection at the ceiling level at each floor.

Ryan Hinson

11/20/2024 08:39:18 am

Here is pertinent verbiage from NFPA 15 (2022):
6.5.2.4 Pilot-Type Sprinklers.
6.5.2.4.2 Where located under a ceiling, pilot sprinklers shall
be positioned in accordance with the requirements for automatic
sprinklers in NFPA 13.
6.5.2.4.3 Maximum horizontal spacing for indoor locations
shall not exceed 12 ft (3.7 m).
6.5.2.4.4 The obstruction to water distribution rules for automatic
sprinklers shall not be required to be followed where pilot sprinklers are used.
6.5.2.4.5 Pilot sprinklers shall be permitted to be spaced more
than 22 in. below a ceiling or deck where the maximum
spacing between pilot sprinklers is 10 ft or less.
6.5.2.4.6 Other maximum horizontal pilot sprinkler spacings
differing from those required in 6.5.2.4.2 and 6.5.2.4.3 shall be
permitted where they are installed in accordance with their listing.
6.5.2.4, 7 Pilot sprinklers located outdoors, such as in open
process structures, shall be spaced such that the elevation of a
single level of pilot sprinklers and between additional levels of
pilot sprinklers shall not exceed 17 ft.
6.5.2.4.8 The horizontal distance between pilot sprinklers
installed outdoors shall not exceed 8 ft.
6.5.2.4.9 The horizontal distance between pilot sprinklers
installed outdoors on a given level shall be permitted to be
increased to 10 ft where the elevation of the first level
does not exceed 15 ft, the distance between additional
levels does not exceed 12 ft, and the pilot sprinklers
are staggered vertically.
6.5.2.4.10 Other vertical pilot sprinkler spacings differing
from those required in 6.5.2.4.7 and 6.5.2.4.8 shall be permitted
where installed in accordance with their listing.

Jack G

11/20/2024 10:10:07 am

A sketch would be nice.
Are you indicating (5levels) that there are openings on each level, with ceilings that you are trying to protect?

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Where is Detection for a 5-Level Deluge System?

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