Brad, I had an AHJ like that: sprinklers are better than no sprinklers always make a customer sprinkler a building that contained a 1000F degree molten salt bath process. even though the manufacturer said that water and molten salt don't mix. The AHJ's solution was to shield the machine from the sprinklers. That comprised a $37,000.00 hood that left about three feet of floor on either side, and eight feet at the ends protected by the sprinklers. The machine itself had four levels of redundancy against thermostat failure and each thermostat was an electronic device that reported it's condition to a central processor that was also in a fail-safe mode. harder to get the thing to turn on than to shut down. "Stupid, stupid rat creatures." A beer to the first one that can name the reference for the quoted materials (without using the internet).
On Mon, Sep 8, 2014 at 7:06 AM, Brad Casterline <[email protected]> wrote: > Just throw some heads in there like you knew they were required. If > Woodrow Call was the AHJ he might say "better to have heads and not need > them than to need them and not have them" > > > On Sep 8, 2014, at 8:56 AM, "Bill Brooks" <[email protected]> > wrote: > > > > Another case of the difference between "when required" and "how to do > it". The International Mechanical Code (2012) Sections 510 (Hazardous > Exhaust Systems) and Section 511 (Dust, Stock and Refuse Conveying Systems) > provide guidance on this. Again, it shouldn't be up to a sprinkler > contractor to figure out whether sprinklers should be installed but only to > install per the appropriate standard. As with most of these issues, we > don't know if there is a design professional on this job or whether your > regular customer has just installed a new process and has called you to do > what's required. At a minimum you should have a copy of the IMC which is > enforced for this location. > > > > So, someone (you??) must assess the installation per IMC Section > 510/511 from end to end. There is a suppression system reference in > Section 510.7. Some determination needs to be made as to whether the > materials are "nonflammable and noncombustible under all conditions and at > any concentration" then make the call on suppression. The entire exhaust > system must be engineered to meet the performance characteristics in the > IMC. > > > > Of course, local code amendments will govern as well as any local AHJ, > insurance requirements etc. > > > > Sprinkler contractors have a long history of being the can-do guys, with > no good way to transfer scope responsibility to the right place. > > > > Bill Brooks > > > > William N. Brooks, P.E. > > Brooks Fire Protection Engineering Inc. > > 372 Wilett Drive > > Severna Park, MD 21146-1904 > > 410-544-3620 > > 410-544-3032 FAX > > 412-400-6528 Cell > > > > > > > > -----Original Message----- > > From: Sprinklerforum [mailto: > [email protected]] On Behalf Of Dewayne > Martinez > > Sent: Monday, September 08, 2014 7:43 AM > > To: [email protected] > > Subject: fume hood / dust collector - sprinklers in? > > > > I have a job where they have a small furnace to create molten metal for > castings. There is a hood (2x8ft) above the area where they take the used > probes and clean them off. This duct work goes outside to a dust > collector. How do I determine if sprinklers are needed in the hood and > ductwork? > > > > Thanks, > > > > Dewayne > > _______________________________________________ > > 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 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) A problem well stated is a problem half solved. -Charles F. Kettering, inventor and engineer (1876-1958) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
