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
