And how would a dry system stop an explosion? Ultra High Speed Deluge is sometimes used for explosives in buildings. The most common method I've seen for storage is distance. Depending on the amount you need to be x feet away from anything for explosives stored in the open, less distance for the same amount stored behind a berm, less again if in a magazine. UFC had some tables. I suspect IFC does also. Remember to not put the cart before the horse. Fire protection is a battle against exposure and egress. Sprinklers are a stratagem to mitigate against exposure as is distance and passive protection such as blast walls and fire barriers and berms. The navy has a building where high explosives and volatile fuels are present. There is a plaque on the wall, "Maximum Occupancy 7." The building is large and can physically accommodate many more than seven, but the workers adhere to this rule diligently. When you re-read the plaque in your mind to say, "Maximum Acceptable Casualties 7," it makes more sense. Sometimes exposure is always present. It's how you handle it that counts and a job trailer full of, I assume, black powder explosives and projectiles under stadium bleachers is kind of scary. On the other hand Fermi's nuclear pile (the first and therefore the one least tested), Chicago Pile-1 (CP-1) was built on a racquets court, under the abandoned west stands of the original Alonzo Stagg Field stadium, at the University of Chicago. How'd you like to be sitting above that?
On Mon, Jul 14, 2008 at 3:48 PM, Thom McMahon <[EMAIL PROTECTED]> wrote: > Sounds like a Job for "Move the damn trailer!!" AHJ. If a fire's already big > enough in the trailer to open a head, I sure don't want to be in that grand > stand while the air release fan's the flame's. > > > Thom McMahon, SET > Firetech, Inc. > 2560 Copper Ridge Dr > P.O. Box 882136 > Steamboat Springs, CO 80488 > Tel: 970-879-7952 > Fax: 970-879-7926 > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of George Church > Sent: Monday, July 14, 2008 4:35 PM > To: [email protected] > Subject: RE: Explosives > > Are there ever times when there are people sitting in the grandstands above > the trailer full of "explosives"? I'd want a little more than a dry system > outdoors (not timely on windy days) between my seat and explosives, > especially if some cig butts are dropping in the ordinary combustibles area > around the trailer (dixie cups from last week, napkins, usual stuff) > > Other than having a place of assembly directly above explosive storage, no I > don't see anything wrong. > > Seriously, the above is a little scary. I don't know why a flexhead wouldn't > feed the sprinkler without bad things happening. I can tell you that a 5,000 > SF retail side and a 5,000 SF storage side of retail fireworks is nothing > more than OH2- until the fireworks catch fire, and ESFR's wouldn't work, > you'd have wished you had a suprotex or primac system with 50 millisecond > suppression. The sprinklers in the retail/storage I described had a lot more > fire load, but the sprinklers are only intended to stop a fire before it > sets the fireworks on fire. Not economically feasible to use infrared > detection when your competitors are selling out of tents. > > glc > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of douglas hicks > Sent: Monday, July 14, 2008 6:04 PM > To: sprinkler board > Subject: Explosives > > I have a customer who stores a quantity of less than 2 # of Class 1.4G > explosives. These explosives are comparable to fireworks. The 1.4G is > stored in a metal cabinet, not rated. The storage unit is 8 foot wide x 8 > foot high x 12 foot long. The construction is wood frame, plywood floor, > wood panel interior, and metal outside. If this sounds like a job trailer, > your are right. The trailer is parked under a grandstand. the steel/wood > grandstand is protected with a dry system, under the grandstands. Other > contents are ordinary combustibles, wood, paper, cardboard. > > Upon occasion, the trailer is moved to other locations for shows. Then the > trailer is parked under the grandstand. unless the trailer is put in the > exact same spot, connection to the sprinkler system will be difficult. Can > the flex head work for this application? As the 1.4G is in a cabinet, I > would feel better with a sprinkler head in the cabinet, with a head or heads > protecting the trailer. > > Any suggestions? > > Douglas Hicks > General Fire Equipment Co of Eastern Oregon, Inc > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.138 / Virus Database: 270.4.10/1552 - Release Date: 7/14/2008 > 6:28 PM > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
