Thanks Craig
I normally use FM data sheets as back up information or design criteria if there is nothing in the NFPA standards, I just found it strange that there was information for exposed but not for cartoned. Thank you James Crawford Phaser Fire Protection Ltd. Phone 604-888-0318 Fax 604-888-4732 Cel 604-790-0938 Email [email protected] Web www.phaserfire.ca From: Sprinklerforum [mailto:[email protected]] On Behalf Of Prahl, Craig/GVL Sent: Tuesday, December 12, 2017 12:14 PM To: [email protected] Subject: RE: Cartoned Expanded Group "A" Plastics When the NFPA Standards do not specifically address a particular situation, it is common to reach out to other recognized industry standards for guidance. FM Data Sheets often provide that info or you may find other Standards or Industry Practices/Guidelines that address a unique condition that NFPA does not. Within the NFPA Standards is section 1.5, Equivalency. Within this section there is a provision for use of alternate methods or materials which can be substantiated to achieve an intended equal or better level of protection when presented and accepted by the AHJ. I have never had an AHJ reject an alternative methodology when citing a known industry resource. Another avenue is to research the various sprinkler manufacturers to see what new offering they may have recently had Listed and/or Approved. There are times when a new sprinkler is released for sale and it is not included in the current NFPA offering. Again, present that as your "equivalency" to the AHJ. As far as using a "higher hazard" criteria to protect a perceived "lesser hazard", well, could you unequivocally defend that decision? It's not a matter of logic or gut feelings, it has to have some basis in actual testing or calculations to prove the concept. The differentiating factor dealing with cartooned versus exposed is that, simply put, cartoned criteria will assume absorption of sprinkler discharge to help create a delay in ignition of the contents due to the soaked carton acting as somewhat of a heatsink, preventing direct contact of the plastic commodity with the flame front. Craig L. Prahl Fire Protection Group Lead/SME CH2M 200 Verdae Blvd. Greenville, SC 29607 Direct - 864.920.7540 Fax - 864.920.7129 CH2MHILL Extension 77540 [email protected] From: Sprinklerforum [mailto:[email protected]] On Behalf Of James Crawford Sent: Tuesday, December 12, 2017 1:04 PM To: [email protected] Subject: Cartoned Expanded Group "A" Plastics [EXTERNAL] There does not seem to be a protection scheme for cartoned expanded Group "A" plastics for buildings above 32'-0" ceiling heights, but there is now one for exposed expanded Group "A" plastics for building up to 40'-0" ceiling heights (NFPA #13 2016 ed). Have I missed something or do you used exposed expanded to protect cartoned expanded and if so why not state that. We have AHJs that if the code does not provide a protection scheme you cannot store that product even if there are schemes to protect a more hazardous product. Comments please. Thank you James Crawford Phaser Fire Protection Ltd. Phone 604-888-0318 Fax 604-888-4732 Cel 604-790-0938 Email [email protected] Web www.phaserfire.ca
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