I have 4 Ft wide x 4 Ft deep window pockets in a 100 year old class room building with new drop ceilings. Adding a sprinkler to a window pocket because it is over 3 Ft. deep makes no sense to me in these class rooms. If a pocket sprinkler activates and washes the windows it does nothing for the fire 8-12 Ft. away. I plan to ask for a variance from the Ohio State plans examiner at submittal though likely to no avail.
Art Tiroly ATCO Fire Protection From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Monday, September 12, 2016 5:51 PM To: [email protected] Subject: Re: Ceiling Pockets It's all about activation Ron/Bruce. Roland's insight as to the pass/fail criteria was a stroke of genius. I like to explain it and then Roland corrects me. So I'll forego my part and wait for Roland to get his ears on. Brad On Sep 12, 2016 4:41 PM, "Bruce Verhei" <[email protected] <mailto:[email protected]> > wrote: Ron is briefer. On Sep 12, 2016, at 14:39, Bruce Verhei <[email protected] <mailto:[email protected]> > wrote: Isn't the idea of using a Volume completely different than viewing his as an Area, such as a large sail sewing table that obstructs coverage as well as delaying operation? Wasn't 1,000 cu ft a consensus guesstimate saying we'd allow a space this big for heat to accumulate in before banking down to activate heads? And experience presumably has shown it works, usually? Putting a head to cover part of it is better if fire is under that head. If fire is away from head will you delay heat from banking down, resulting in a worse situation? I don't know. And I would guesstimate original designer doesn't either. Best Bruce Verhei On Sep 12, 2016, at 11:21, T. Silva <[email protected] <mailto:[email protected]> > wrote: _____ NFPA 13, 2013 8.6.7.2 (1) "The total volume of the unprotected ceiling pocket does not exceed 1000 cu.ft." Is the 1000 cuft only the volume of the pocket that is not sprinklered? For example, there is a pocket that is 30" long x 20' wide x 2' deep, creating a 1200 cuft ceiling pocket. If one row of sprinklers are provided in this pocket (along the 30 foot length), to provide a protected area of 30' x 10' (1) Is the the total volume of the unprotected ceiling pocket still 1200 cuft? or (2) Reduced to 600 cuft, discounting the sprinklered area? Thanks, Tony _______________________________________________ Sprinklerforum mailing list [email protected] <mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] <mailto:[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
