Well, it does give us something to think about. I wonder, though, does the residential sprinkler head's ability to provide "better control than spray sprinklers in residential occupancies" (quoted from NFPA 13) necessarily mean that the commercial QR head is inadequate for the job? I submit that it is not, due to the fact that NFPA 13 still allows it's use in this scenario. I mean, a Lexus is better than a Toyota, but they'll both get you to work every day.
If I were the engineer of record, I might require residential sprinklers in the spec. But, if I were the installing contractor in this case (and not otherwise hand-tied by the spec) I think I would install the most economical QR sprinkler, be code-compliant, and call it a day. Or, maybe not change a thing if the existing heads are already QR. -Kyle M -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of cw bamford Sent: Friday, March 16, 2018 4:39 PM To: [email protected] Subject: Re: [EXTERNAL] RE: Existing 3/4" outlets "the right Sprinkler Head for the right job" in a Hallway of a hotel or apartment building most AHJ's will accept a residential head---or you can use a light hazard head..... Residential Heads----react fast --- high wall wetting---- Prevent Flashover --- and give opportunity to Exit..... usually .05 gpm /sqft Light Hazard Quick Response .10 gpm /sqft a lot more water ....but is it Superior? ...for Life Safety? we started off with THIS quote "light hazard residential exposed “loft” space" hmmmm what is that? a Live Work unit? a painter? potter with kiln? or just a residence? Chuck Bamford SET On Fri, Mar 16, 2018 at 1:04 PM, Kyle.Montgomery <[email protected]> wrote: > Is that the general consensus? I've never really thought of > residential heads being far superior to commercial QR heads. I mean, > we use residential sprinklers all the time, but primarily because they > are advantageous to us in the types of buildings we are installing > (4-head calc, better extended coverage options, etc.). I guess I've > always considered a residential system to be more lenient (i.e. less > water flow and pressure required) and thus a "lower" level of protection than > your standard light hazard system. > > If residential heads are actually providing a "higher" level of > protection, then why is it that quick response commercial heads can be > used in both residential and commercial occupancies, but that > residential heads may only be used in residential occupancies? > > -Kyle M > > -----Original Message----- > From: Sprinklerforum [mailto:[email protected]. > org] On Behalf Of [email protected] > Sent: Friday, March 16, 2018 11:17 AM > To: [email protected] > Subject: Re: [EXTERNAL] RE: Existing 3/4" outlets > > Kyle, if there is even a whiff of Residential about the occupancy the > listed res should be used because, along with the quick response, res > heads have a superior pattern, wetting not only the floor but high up > on the walls too (curtains, bookshelves, the curio cabinets full of > Russian Shadow Boxes, etc.) > > Brad. > > Quoting "Kyle.Montgomery" <[email protected]>: > > > Do you NEED residential heads, or can you just use any > > quick-response head? Even if it over-discharges, I wouldn't expect > > that to be a problem for the calcs since it was originally designed for OH > > 2. > > > > Why do you even need to change the heads? Are the existing K-8 heads > > standard response? > > > > -Kyle M > > > > -----Original Message----- > > From: Sprinklerforum > > [mailto:[email protected]] On Behalf Of > > Dewayne Martinez > > Sent: Friday, March 16, 2018 9:46 AM > > To: [email protected] > > Cc: Dewayne Martinez <[email protected]> > > Subject: [EXTERNAL] RE: Existing 3/4" outlets > > > > That’s a thought.....The problem is the original shell with 3/4" > > uprights with a pipe centerline of 12" below deck. No residential > > uprights in 3/4" > > and I thought residential pendant heads are not listed to be > > installed exposed? > > > > Dewayne Martinez > > Fire Protection Design Manager > > > > TOTAL Mechanical > > Building Integrity > > > > W234 N2830 Paul Rd. > > Pewaukee, WI 53072 > > [email protected] > > Ph: 262-522-7110 > > Cell: 414-406-5208 > > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.total-2Dmech > > an > > ical.com_&d=DwIGaQ&c=wn3mZQLIuInh2ClcJ0_DIA&r=Z_2A85VL7AQzoqudh6uOyS > > 3b > > n8etxB7nLN8OBJwQd9A&m=QgdEeClG--ixhAlrzYXkB9w1GVgwdnHkcfh2xsZlbVU&s= > > m9 niRfDrj2QzVwiLzgS0z9PaTLR67E2v662JDvbdOzA&e= > > > > > > -----Original Message----- > > From: Sprinklerforum > > <[email protected]> On Behalf Of Mike B > > Morey > > Sent: Friday, March 16, 2018 9:57 AM > > To: [email protected] > > Subject: Re: Existing 3/4" outlets > > > > You say bushing, I say sprinkler head extension less than 2" per 6.4.8? > > > > > > Mike Morey > > CFPS 3229 • NICET S.E.T. 123677 > > Project Manager • Fire Protection Group Shambaugh & Son, LP an EMCOR > > Company > > 7614 Opportunity Drive • Fort Wayne, IN • 46825 direct 260.487.7824 > > / cell > > 260.417.0625 / fax 260.487.7991 email [email protected] > > > > > > > > > > > > > > > > From: Dewayne Martinez <[email protected]> > > To: [email protected] > > Cc: Dewayne Martinez <[email protected]> > > Date: 03/15/2018 06:43 PM > > Subject: Existing 3/4" outlets > > Sent by: "Sprinklerforum" > > <[email protected]> > > > > > > > > > > BE ADVISED - This email originated outside EMCOR. > > > > > > I have a project that was originally designed as a OH II space that > > will now be turned into a light hazard residential exposed “loft” > > space. The existing ¾” K8.0 sprinklers over discharge like crazy. > > Can I bush the 3/4'” > > outlets down to ½” to use K5.6 sprinklers? If not any suggestions? > > > > > > > > Dewayne Martinez > > > > Fire Protection Design Manager > > > > > > > > *TOTAL* *Mechanical* > > > > *Building* *Integrity* > > > > > > W234 N2830 Paul Rd. > > Pewaukee, WI 53072 > > > > [email protected] > > > > Ph: 262-522-7110 > > > > Cell: 414-406-5208 > > > > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.total-2Dmech > > an > > ical.com_&d=DwIGaQ&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t2hrRBa-JsS06T4X_uuY > > OS > > JoclVWgSRO8Nq6TDdsg&m=B1gjGjTnf7-Ej9T8PcnuSRVFemMqu2U1aEPDQxrOPHo&s= > > Ru Z6bsVtOYaDGrG_UfPQiu-9SlgO6obtB79V-_fi8X8&e= > > > > > > [image: Consecutive Honors 2012-2017] > > -------------- next part -------------- An HTML attachment was > > scrubbed... > > URL: < > > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprink > > le > > r.org_private.cgi_sprinklerforum-2Dfiresprinkler.org_attachments_201 > > 80 > > 315_41e14879_attachment.html&d=DwIGaQ&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t > > 2h > > rRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=B1gjGjTnf7-Ej9T8PcnuSRVFemM > > qu 2U1aEPDQxrOPHo&s=6cdt-sQIacSh7qM78kH-MF2ygexAPpze5AppEvB6NWY&e= > >> > > -------------- next part -------------- A non-text attachment was > > scrubbed... > > Name: image001.jpg > > Type: image/jpeg > > Size: 8202 bytes > > Desc: not available > > URL: < > > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprink > > le > > r.org_private.cgi_sprinklerforum-2Dfiresprinkler.org_attachments_201 > > 80 > > 315_41e14879_attachment.jpg&d=DwIGaQ&c=GKdB6-XpYq_0W-WluyVHtw&r=z4t2 > > hr > > RBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=B1gjGjTnf7-Ej9T8PcnuSRVFemMq > > u2 U1aEPDQxrOPHo&s=b2vPc9rxHD40k3ZkHc9JYKjhqeCngJKY6_kzQNoy5EM&e= > >> > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > https://urldefense.proofpoint.com/v2/url?u=http-3A__lists.firesprink > > le > > r.org_listinfo.cgi_sprinklerforum-2Dfiresprinkler.org&d=DwIGaQ&c=GKd > > B6 > > -XpYq_0W-WluyVHtw&r=z4t2hrRBa-JsS06T4X_uuYOSJoclVWgSRO8Nq6TDdsg&m=B1 > > gj > > GjTnf7-Ej9T8PcnuSRVFemMqu2U1aEPDQxrOPHo&s=eLw-8Ymu6_DIM_XseIvcGIrkA6 > > vC > > iJ168TukvdOr5j4&e= > > > > > > > > > > This message is for the named person's use only. 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