#2 - ignore the walls. Most hydraulically demanding 4 sprinklers. Do not forget the .10 verification requirement. This requirement is missed many times.
The only case when the walls apply is when the room design method is utilized. John Sent from my iPhone > On Dec 23, 2014, at 8:10 AM, "Todd - Work" <[email protected]> wrote: > > Greg, > > If I were doing the design, I would use the 6-12 criteria. I believe that the > additional water requirement is due to the delay in activation due to the > increased deflector distance (or so I was told). I think you would have the > same situation in that case. > > For #2, the section in 13 requires that the "hydraulically most remote 4 > sprinklers" be calculated. I would make sure your design meets that criteria. > > Todd G Williams, PE > Fire Protection Design/Consulting > Stonington, CT > www.fpdc.com > 860-535-2080 (ofc) > >> On Dec 22, 2014, at 8:12 PM, Greg McGahan <[email protected]> wrote: >> >> Help please.... >> >> Situation in a NFPA 13 hotel...: >> >> There is a 1'-0" wide soffit by 4" deep adjacent to a restroom wall. If I >> place res sidewall 4" under soffit the deflector would then be 8" below >> the higher ceiling past the 1'-0" soffit. >> >> Although I am very conservative with calcs in general - this one hurts the >> pipe sizes bigtime so I am asking if my conservative approach is >> technically correct or overkill: >> >> Question #1 - Do I have to calculate the head for the 6"-12" distance below >> the ceiling or can I use the 4"-6" range? >> >> >> Question #2 - When you do a 4 head Res calc in a 13 building, do you define >> "adjacent" by linear distance or do you purposely go for the sidewall in >> the next room even if it is further away in order to be conservative? IW - >> the nearest pendent in the next room is 4' away, going the other direction, >> the sidewall in the next room is 10' away.V's are sidewalls and + are >> pendents....thats as close as I can get at this hour. >> >> I I I V I >> V >> I I I I >> I + I + I + I >> + >> I I I I >> >> >> Greg McGahan >> Living Water Fire Protection, LLC <http://www.livingwaterfp.com> >> 1160 McKenzie Road >> Cantonment, FL 32533 >> 850-937-1850 >> fax 850-937-1852 >> _______________________________________________ >> 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
