Hello Jim, The facility in question has a sorting building for the construction waste that also includes further processing of the wood waste to transform it into solid fuel. That operation certainly falls under Extra Hazard - Group 1. However, the storage of wood waste and asphalt shingles in large piles indoors (in another building) falls outside the scope of NFPA 13. It is my responsibility to come up with the design criteria and I could come up with what I think is reasonable but it would not be backed up by any fire tests.
Thank you for your input. David -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jim Davidson Sent: Tuesday, October 01, 2013 2:04 PM To: [email protected]; [email protected] Subject: RE: Sprinkler protection criteria for bulk storage piles David, You need to look at the commodity classification of the recycled construction debris the following is from a review of a recycling facility that we were working on for the local AHJ: "The client operations are the recycling of demolished building materials such as concrete block, gypsum board, steel studs, metal roof deck, some wood studs and small amount of bailed carpet which is removed to outside storage trailers for shipping to recycling mills. Material will be stored in piles not greater than 20 ft in height and be retained by concrete jersey barriers. The sprinkler system is to be a Dry Pipe System, hydraulically designed to provide a 0.30 gpm/sq. ft. over the hydraulically most remote 3,000 sq. ft., sprinkler head spacing will be 100 sq. ft. per head. Because some of the demolished materials can contain plastic materials we have designed the system with a extra hazard design density. As per NFPA 13, 2007 and 2010 Editions paragraph 8.2.3 "Where single systems protect extra hazard, high-piled storage, or storage covered by other NFPA standards, and ordinary or light hazard areas, the extra hazard or storage area coverage shall not exceed the floor area specified for that hazard (40,000 sq. ft.) and the total area coverage shall not exceed 52,000 ft2 (4831 m2)." The original sprinkler contractor bid the job extremely low and tried to get a change order for a second sprinkler system for a 50,000 sq. ft. building by stating that the AHJ required a second system since NFPA 13 only permitted 40,000 sq ft per system for extra hazard occupancies, and failed to mention paragraph 8.2.3 to the Owner, Owner forced installation of system as originally designed and contracted for the price originally bid, AHJ approved the system. Be careful of the pile sizes and location of various commodity classification. You should consult with the Owner and their design team. Regards Jim DAVIDSON ASSOCIATES Fire Protection Engineering P. O. Box 4010 Code Consultants Greenville, DE 19807-0010 Medical Gas Systems Engineering (302) 994-9500 Fax (302) 234-1781 CONFIDENTIALITY This report and any attachments are confidential and also may be privileged. If you are not the named recipient, or have otherwise received this report in error, please destroy the report, notify the sender immediately, and do not disclose its contents to any other person, use them for any purpose, or store or copy them in any medium. Thank you for your cooperation. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of David Bitton Sent: Monday, September 30, 2013 8:01 PM To: [email protected] Subject: Sprinkler protection criteria for bulk storage piles I am looking at a recycling facility for construction debris that has large indoor piles for wood, asphalt shingles, etc. Storage height is to 25 ft. The existing sprinkler system was designed based on the storage requirements for solid-piled/palletized storage of Class III Commodities outlined in NFPA 13. I believe that such storage falls outside the scope of this chapter. However, I am unable to find any guidance elsewhere to address this storage. Does anyone have any additional thoughts about the protection of such piles? David Bitton, ing. Quest Loss Control Services Inc. Les services de prévention des sinistres Quest inc. 5100, rue de la Savane, bureau 200 Montréal, QC H4P 1T8 (514) 341-4545 www.questlosscontrol.com _______________________________________________ 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
