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.
-----Original Message----- From: Todd Williams [mailto:[email protected]] Sent: Monday, November 01, 2010 4:46 PM To: [email protected] Subject: RE: Mechanical closet obstruction I agree. This was a "what do I do?" call from a client this afternoon. He was going to try to meet with the AHJ, but he was the one who had written it up as being obstructed. Someone at the Convention asked me where I find these people. Directly or indirectly, they find me. At 05:39 PM 11/1/2010, you wrote: >It's kind of ridiculous that you have to even have a discussion >about this. What's the AHJ want you to do? > >Craig L. Prahl, CET >Fire Protection Specialist >Mechanical Department >CH2MHILL >Lockwood Greene >1500 International Drive >Spartanburg, SC 29304-0491 >Direct - 864.599.4102 >Fax - 864.599.8439 >[email protected] >http://www.ch2m.com > > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Todd Williams >Sent: Monday, November 01, 2010 5:27 PM >To: [email protected] >Subject: RE: Mechanical closet obstruction > >The 16x16 duct runs vertically off the top of the unit. there is no >bottom of duct > > > >At 05:11 PM 11/1/2010, you wrote: > >Blow up the HVAC unit?, just ;) > > > >Locate the head with deflector at bottom of the 16" deep obstruction. Show > >the section where head can be located up to 22" for obstructed construction. > > > >Tony > > > >-----Original Message----- > >From: [email protected] > >[mailto:[email protected]] On Behalf Of Todd Williams > >Sent: November 1, 2010 3:01 PM > >To: [email protected] > >Subject: RE: Mechanical closet obstruction > > > >Existing condition. Not going to happen > > > > > >At 04:43 PM 11/1/2010, you wrote: > > >It may be hard for him to shove the HVAC unit against the wall. With > > >the minimal space allowed in this closet he still needs room to make > > >duct connections, electrical connections, drain connections etc. But > > >hey you could ask. > > > > > >Craig L. Prahl, CET > > >Fire Protection Specialist > > >Mechanical Department > > >CH2MHILL > > >Lockwood Greene > > >1500 International Drive > > >Spartanburg, SC 29304-0491 > > >Direct - 864.599.4102 > > >Fax - 864.599.8439 > > >[email protected] > > >http://www.ch2m.com > > > > > > > > >-----Original Message----- > > >From: [email protected] > > >[mailto:[email protected]] On Behalf Of > > >[email protected] > > >Sent: Monday, November 01, 2010 4:25 PM > > >To: [email protected] > > >Subject: RE: Mechanical closet obstruction > > > > > >Todd, > > >This is just a thought.Get the HVAC contractor to shift the unit into > > >the corner,then place the sprinkler in the opposite,leaving 8" clear on > > >2 sides.You can maintain the 4" min. off the wall and cover ALL the > > >clear space in the room.Right? > > > > > >Lamar Vaughn > > > > > > > > >On Mon, Nov 1, 2010 at 2:53 PM, Todd Williams wrote: > > > > > > > This is under the 2002 code and they have the 5 ft ceiling height > > > > restriction. I believe this is an 8 ft ceiling. > > > > > > > > > > > > > > > > At 02:28 PM 11/1/2010, you wrote: > > > >> Todd, > > > >> > > > >> If this is residential, 6.8.1.5.3.1 specifically addresses this > > > >> concern. > > > >> 2007 ed. > > > >> > > > >> Cliff > > > >> -----Original Message----- > > > >> From: [email protected] > > > >> [mailto:[email protected]] On Behalf Of Todd > > > >> Williams > > > >> Sent: Monday, November 01, 2010 1:22 PM > > > >> To: [email protected] > > > >> Subject: Mechanical closet obstruction > > > >> > > > >> I know this was referenced in another post, but I can't find it so > > > >> I'm starting a new thread. > > > >> > > > >> A 2' x 2' mechanical closet. The unit is mounted on the floor and a > > > >> 16" x 16" plenum comes off the top and runs up through the ceiling > > > >> at roughly the center of the room (approximately 4" clearance on > > > >> each side). One sidewall sprinkler is installed near the ceiling > > > >> and the AHJ questions the head being obstructed. Outside of > > > >> installing 4 sprinklers in the closet, any good way to address > > > >> this? The State Building Code specifically excludes the application of > >common sense. > > > >> Thoughts? > > > >> > > > >> Todd G. Williams, PE > > > >> Fire Protection Design/Consulting > > > >> Stonington, CT > > > >> 860.535.2080 > > > >> www.fpdc.com > > > >> > > > >> _______________________________________________ > > > >> 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) > > > > > > > > Todd G. Williams, PE > > > > Fire Protection Design/Consulting > > > > Stonington, CT > > > > 860.535.2080 > > > > www.fpdc.com > > > > > > > > _______________________________________________ > > > > 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) > > >_______________________________________________ > > >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) > > > >Todd G. Williams, PE > >Fire Protection Design/Consulting > >Stonington, CT > >860.535.2080 > >www.fpdc.com > > > >_______________________________________________ > >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) > >Todd G. Williams, PE >Fire Protection Design/Consulting >Stonington, CT >860.535.2080 >www.fpdc.com > >_______________________________________________ >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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ 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)
