That structural members only is for obstructions less than 48" wide where you would apply the "3x rule". Since he mentioned the lights are greater than 48" in the hypothetical question, the structural members only exclusion would not apply.
I can say I have never run into suspended lights that creates the obstruction with standard spray sprinklers. I have had the issue with lights and ESFR sprinklers. In those cases we were able to get the lights changed to less than 24" in width so we only had to maintain a 12" horizontal distance. Best of luck in your particular situation. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On Jan 11, 2017, at 5:30 PM, Mark Phillips <[email protected]> wrote: > > We need a little more info but there are some exceptions that say only > stuctual members are considered obstructions. > > Sent from my Verizon 4G LTE Droid > On Jan 11, 2017 7:14 PM, very Cool <[email protected]> wrote: > I have a project where ceiling lights is hung from the ceiling. The light is > 48" so technically we do not have to sprinkler under it (code requires > sprinkler under obstruction more than 4 feet wide), but I am wondering what > to be done if this was 49 inches. This light is located more than 4 feet from > ceiling slab and putting sprinkler under it is not an option architecturally. > Wondering if anyone came across this scenario. > P.s. Light is a solid round shape with 48" diameter > > Ramez > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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