nfpa 13 suspended continuous lighting track obstruction

[dxbhd]

Hi all,
I have a problem with a few 20 metre long suspended lighting tracks possibly baffling the sprinklers in a retail shop. The light assembly is 109mm high x 270mm wide and is suspended by thin wires. The bottom of the lighting is 380mm below the sprinkler deflectors. Would this be ok? I don't have a copy of the code just now, however will purchase one soon. What clauses would this come under. From some years ago I vaguely remember nfpa had quite good info on esfr suspended obstructions but was lacking a bit on standard spray sprinkler obstructions in that it assumed the obstruction was a solid vertical to the ceiling.
Thanks in advance for any advice

 

[cdafd]

So are you using esfr heads in this installation or a different head ??

Still translating the measurements

 

[dxbhd]

they have standard spray sprinklers.

 

[cdafd]

you are closer than 457mm to a sprinkler head.

from nfpa 13 2013 edition


8.5.5.2* Obstructions to Sprinkler Discharge Pattern Development.

8.5.5.2.1 Continuous or noncontinuous obstructions less than or equal to 18 in. (457 mm) below the sprinkler deflector that prevent the pattern from fully developing shall comply with 8.5.5.2.



3.3.18 Obstruction.

3.3.18.1 Continuous Obstruction. An obstruction located at or below the level of sprinkler deflectors that affect the discharge pattern of two or more adjacent sprinklers.