Glad you fixed that, I stayed awake all day yesterday thinking about those calculations..............
Craig L. Prahl, CET Fire Protection CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brad Casterline Sent: Wednesday, November 03, 2010 8:21 AM To: [email protected] Subject: RE: Mechanical closet obstruction This woke me up at 3:00 A.M.- it has error written all over it- I apologize to the Forum, and vow to double check my numbers AND my motives before I post anything. In terms of density vs fire power with little heads flowing a minimum: 5.4 gal/min x 3.781 liter/gal/60= .3403 Kg/sec x 4,180 Kj/Kg= 1,422 Kw/500 Kw/tree= 2.84 big dry Christmas trees, not 6, and now I have to perish the thought that one head in this closet seems inadequate somehow :) -----Original Message----- From: Brad Casterline [mailto:[email protected]] Sent: Tuesday, November 02, 2010 7:51 AM To: [email protected] Subject: RE: Mechanical closet obstruction Todd, maybe some words and numbers together would work, e.g., "We put water on floors. An obstruction is something that prevents the water from reaching every square foot with a minimum density". 2 strips at 4"x24" + 2 @ 4"x16"=320/144=2.2 SF. (dbl chk 4-1.8=2.2) Maybe the head is just a 4.2 so Q=12/2.2=5.4. This is a pretty decent density (36 X min). 12x3.781=45.372/60=.756 Kg/sec x 4,180 Kj/Kg/sec= 3,161 Kw/500 Kw/tree. (Pardon my French with the numbers). It is not every day we get to give the AHJ a density that could handle the fire power of 6 big dry Christmas trees at peak burning rate with little heads flowing a minimum. _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
