Because the tires below the mezzanine won't be adequately protected by the roof system. The tires on the upper deck will fill with some of the some of the water and the mezzanine will deflect any remaining discharge from the sprinklers above to the point that you'll be lucky to dampen the tires below the rack. Also, the area below the mezzanine ends up being loaded with cardboard boxes with rims and empty boxes.
The ESFR's at the roof may have been adequate if there had not been a mezzanine placed midway up the racks. Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Monday, March 12, 2012 2:32 PM To: [email protected] Subject: RE: Tire Storage Why does the bottom 8 ft of storage have to be protected twice? If the ESFR's at the roof can do the storage the sprinklers below the grating are to protect the aisle and OH2 should be adequate. Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bobby Gillett Sent: Monday, March 12, 2012 11:00 AM To: [email protected] Subject: RE: Tire Storage Roland, I felt like if the ceiling is designed based on the 16'-0 high rack scenario and this will cover to the floor in the areas where the mezzanine is open (between racks in front of some, etc.). Then under the mezzanine protect this based on the same storage scenario but for 8'-0 high tire storage with water shields on the sprinklers; whether it be ESFR, Large Drop, Control Mode Density Area, etc. as long as it is per Chapter 18 then it would be fine. I guess this statement is false now? Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. (731) 424-0130 office (731) 424-9285 fax (731) 267-4853 cell www.keyfireprotection.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Monday, March 12, 2012 12:35 PM To: [email protected] Subject: Re: Tire Storage This issue was tangentially discussed by the TC this cycle. It was flagged by several of us that explicit guidance is needed for ceilings that are metal grating such as mezzanines. It would also apply to walkways as discussed here. Nonetheless, the TC statement does shed some light on addressing it (see below). To set the stage, the submitted comment was for a single design criteria for all situations. Roland ROC 13-257 Committee Meeting Action: Reject Committee Statement: A single design basis does not adequately address the different conditions that can exist beneath all locations using grating. Sprinklers beneath gratings that are obstructions should mimic the ceiling design basis and when beneath a floor can be a separate design basis. On Mar 12, 2012, at 9:52 AM, Bobby Gillett wrote: > Agree, that is what I was thinking - any suggestions on the lower > level? > Just base it in what it is - 8'-0 high rack storage for tires on > tread in > fixed open racks? > > Bobby Gillett > Sr. Project Manager -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachment s/20120312/bb2c1071/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.1913 / Virus Database: 2114/4866 - Release Date: 03/12/12 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
