Have you touched base with Martin Workman Roland
Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Nov 13, 2015, at 9:36 AM, Steve Leyton <[email protected]> wrote: > > Does anyone have any strongly held opinions about cross-zoning of detectors > for single-interlock preaction systems? I haven't done one, and have usually > fallen back on double-interlock when there is a heightened concern about > accidental activation (earthquakes and all that). My understanding is that > when two different types of detectors are cross-zoned, it can help to detect > a wider range of fires that may grow out of the incipient stages at different > speed and/or with different release characteristics. And cross-zoning with > the same type of detector can give a heightened level of fail safety, so that > seems more comparable to double-interlock. I'm interested in hearing any > suggestions, opinions of the value of this design (or not) and good or best > practices. > > Steve Leyton > > _______________________________________________ > 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
