Are these suspended in such a way that they can swing back and forth in any air flow? Could a fire plume moving up through them have any unforeseen consequences? Just thoughts from someone who over-thinks everything.
>Subject: RE: Sound Baffles > >Thanks for the thoughts. The suspended obstruction table is met quite >easily (though this is not Light hazard), meaning that water can get over >the top of the obstruction, but it will just hit the next panel. > >The rules for obstructions greater than 18 in. speak to significant >horizontal obstructions, which is not the case here. The horizontal element >is only 2 ins. Max. > >I suppose this is no different than deep exposed beams where a head is >placed in each beam pocket, none of which meet the beam rule. There does >not seem to be a basis to deny the proposal. > >Rich Richardson >Seattle Fire Department > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of >[email protected] >Sent: Thursday, October 29, 2009 13:26 >To: [email protected]; Richardson, R >Subject: RE: Sound Baffles > >Unfortunately that section deals with grid or egg-crate type ceilings where >the ceiling panel is much thinner than the 24 inches of depth of the sound >baffles. > > >Craig L. Prahl, CET >Fire Protection Specialist >Mechanical Department >CH2MHILL >Lockwood Greene >1500 International Drive >PO Box 491, 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 Hinson, Ryan >Sent: Thursday, October 29, 2009 4:03 PM >To: [email protected] >Subject: RE: Sound Baffles > >I would refer to NFPA 13 (2007) section 8.15.13. This refers to the >obstruction of the vertical member to the developing spray pattern. I would >reduce the square footage per head to protect this area. > >Ryan Hinson >Burns & McDonnell >Direct: 952-656-6003 Ext 3662 > >-----Original Message----- >From: [email protected] >[mailto:[email protected]] On Behalf Of Richardson, R >Sent: Thursday, October 29, 2009 2:55 PM >To: [email protected] >Subject: Sound Baffles > >We are reviewing a proposal to install sound baffles suspended from the >roof, and evaluating obstructions to sprinkler discharge. The baffles >are 2 ft. deep panels hung vertically every ft. The top of the baffle is >just over 18 ins. From the sprinkler heads so NFPA 13 would indicate that >there is no obstruction problem because they do not exceed the 4 ft. >obstruction trigger for obstruction more than 18 in. below the heads. > >However, the panels are every foot and it sure seems like a significant >obstruction, but the installation does not violate NFPA 13 for obstructions. > >Has anyone ever dealt with this issue and offer any insight. > >Thanks, > >Rich Richardson >Seattle Fire Department > Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ 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)
