I think I follow. And that makes sense. John Irwin Quick Response Fire Protection
From: Sprinklerforum <sprinklerforum-boun...@lists.firesprinkler.org> On Behalf Of Mark Sornsin [FAR] Sent: Wednesday, November 28, 2018 3:22 PM To: 'sprinklerforum@lists.firesprinkler.org' <sprinklerforum@lists.firesprinkler.org> Subject: RE: Mixed rack storage John, I assume the ceramics are on pallets and/or in cartons so are considered class I or II . The hazard is greater than 12’ storage of Group A plastics. And it has to be greater than 20’ storage of ceramics simply because 20’ storage of ceramics doesn’t normally have the highly combustible lower 12’. By that logic I don’t see how you can protect as 20’ storage of ceramics. The question is whether or not there is a design somewhere between 20’ ceramics and 20’ group A plastics. [Visit our Website at www.SummitCoUS.com]<http://www.SummitCoUS.com> Mark Sornsin Sr. Fire Protection Engineer Direct: 701-499-1391 Cell: 701-526-8585 From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of John Irwin Sent: Wednesday, November 28, 2018 1:05 PM To: sprinklerforum@lists.firesprinkler.org<mailto:sprinklerforum@lists.firesprinkler.org> Subject: Mixed rack storage I am working on a flooring retail building that has a 4,600 sqft warehouse. Roof is at 30’ and they want to store to 20’. They will have vinyl flowing and rolls of rug and carpet, as well as ceramic and porcelain tile. I believe I have determined that the vinyl and rolls of rug equate to Group A, non-expanded plastics. My question is this … is it permissible for the client to storage all their group A plastics on racks UNDER 12’ and their ceramic floor tiles on the racks OVER 12’ and to then calculate the roof system for the lesser, ceramic tile storage? John Irwin ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________
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