ESFR heads and light fixtures
ESFR heads and light fixtures
(OP)
Reference thread184-371238: Obstructions to ESFR heads due to Lights. To the posters and interested parties on ESFR heads and light fixtures. I have gone through an abbreviated review on the width of fixtures and as I am travelling I don't have my standards at hand, this is a question. The width was stated a number of times as a maximum of 24" in the original thread. I also pulled up some ESFR fire testing data from Tyco as well as FMG's 2-0, 2-2 and 8-9 and a presentation by Tyco on storage sprinklers, the Tyco presentation by one of their top men was informative but also referenced NFPA 13 and the 24" width of fixtures, it also quoted the NFPA 13 2013 standard (NFPA 13-13). A light fixture (the new LED warehouse style) is 23.78" x 47.78" and is listed by all the manufacturers as a nominal 24" wide by 48" long. Is the width stated (in the NFPA 13 standard) as the longest dimension of a light fixture? If not is the typical fluorescent style (LED or not) of a 2' W x4' L nominal dimension acceptable provided it is installed as required by the NFPA 13-13 standard's clear height and distance from opposing lines, presuming it is not installed parallel to the lights? In other words, in your opinion(s) provided the light meets all the NFPA 13 requirements for distances and clearances and is 24" or less IN WIDTH, is it an obstruction? Thanks-





RE: ESFR heads and light fixtures
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: ESFR heads and light fixtures
But I believe the 2013 edition of 13 has under the 4' obstruction rule that the width is defined as the least of the dimensions.
One could almost argue intent here if the AHJ is a listener.....
R/
Matt
RE: ESFR heads and light fixtures
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: ESFR heads and light fixtures
Eventually I did find an FMG detail for ESFR that shows and dimensions the fixture's width as 24" BUT the length runs parallel to the branch line in the FMG-DS and now I have to go back and re-read NFPA 13 as I believe it said that the length of the fixture could not be parallel to the branch line for their spacing.
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