Tim, I respectfully disagree. If the wood slats comply with the description below then I believe it is the closest reference we have to this situation. In our case the depth exceeded the width of the opening so we put sprinklers above the slats. Our ceiling was 1 x 6's turned vertical on edge and spaced 5" center to center. That seemed like it would be a significant disruption of the spray pattern and the Engineer agreed...
Open-grid ceilings in which the openings are 1/4 in. (6.4 mm) or larger in the least dimension, where the thickness or depth of the material does not exceed the least dimension of the opening, and where such openings constitute 70 percent of the area of the ceiling material. The spacing of the sprinklers over the open-grid ceiling shall then comply with the following: Greg McGahan Living Water Fire Protection, LLC <http://www.livingwaterfp.com> 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 On Wed, Aug 19, 2015 at 8:41 AM, Tim Stone <[email protected]> wrote: > Todd, > > I don't believe Open Grid Ceiling rules will apply. The material can't be > any thicker than the least dimension of the opening. > If it is a wood frame material like 2x solid wood then you will have an > obstruction to spray pattern to worry about. Once you get all the > information on the slatted ceiling solutions will be easier. > > Regards, > G. Tim Stone > > G. Tim Stone Consulting, LLC > NICET Level III Engineering Technician > Fire Protection Sprinkler Design > and Consulting Services > > 117 Old Stage Rd. - Essex Jct., VT. 05452 > CELL: (802) 373-0638 TEL: (802) 434-2968 Fax: (802) 434-4343 > [email protected] > > -----Original Message----- > From: Sprinklerforum [mailto: > [email protected]] > On Behalf Of Todd - Work > Sent: Wednesday, August 19, 2015 8:10 AM > To: [email protected] > Subject: slatted ceiling > > I am working on a project with a slatted ceiling in a wide corridor. The > ceiling construction is a fire rated wood and is considered non > conbustible. > There is a 2' wide sheetrock soffit around the perimeter and the slatted > area is approximately 6 ft wide down the middle. The space above the > ceiling > is non combustible and would not normally require sprinklers. The FM has > raised a question if sprinklers below would operate given the openings (I > am > trying to get the dimensions of the openings and the slats). I did not see > anything in 13 addresses this. Am I missing something? Thoughts? > > Sent using CloudMagic > [https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2] > _______________________________________________ > 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 > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
