Unobstructed means just that. Noncomb. members means no closley spaced, light, fast burning 'kindling'. I would vote 225 sf max if my vote counted.
-----Original Message----- From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Travis Mack Sent: Wednesday, May 06, 2015 12:40 PM To: sprinklerforum@lists.firesprinkler.org Subject: Re: Attic That makes sense. I was grabbing for straws. Customer missed it because of steel framing. Didn't catch plywood sheathing. I was hoping to be able to help cut down sprinkler count. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On May 6, 2015, at 10:25 AM, Eric V. Tysinger <e...@wiginton.net> wrote: > > I would think that the spacing of the members is addressed as potential obstructions. Less than 3' means there are more members between each sprinkler, so the maximum spacing is reduced to lessen the number of obstructions. I don't think the combustibility of the members plays a part. The table only cares if it is non-combustible or combustible construction, obstructed or unobstructed, and the spacing of the members. > > > > Eric V. Tysinger > Designer > Wiginton Fire Systems - Miami, FL > Email: e...@wiginton.net > Main: 305-888-2402p3416 > Direct: 305-830-0490 > Fax: 305-888-3804 > Mobile: 239-633-9703 > > > > Confidentiality Notice: > This e-mail message, including any attachments, is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. > -----Original Message----- > From: Sprinklerforum [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of Travis Mack > Sent: Wednesday, May 06, 2015 1:17 PM > To: sprinklerforum@lists.firesprinkler.org > Subject: Re: Attic > > That was my question. Does the non combustible framing members modify that, or allow for any changes? I am aware of using that for combustible members. > > Travis Mack, SET > MFP Design, LLC > "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 > Send large files to MFP Design via: > https://www.hightail.com/u/MFPDesign > > Sent from my iPhone > >> On May 6, 2015, at 10:06 AM, Eric V. Tysinger <e...@wiginton.net> wrote: >> >> Wouldn't table 8.6.2.2.1(a) indicate 130sqft max? >> >> Combustible, Unobstructed, with exposed members less than 3'-0 on center. >> >> >> >> >> Eric V. Tysinger >> Designer >> Wiginton Fire Systems - Miami, FL >> Email: e...@wiginton.net >> Main: 305-888-2402p3416 >> Direct: 305-830-0490 >> Fax: 305-888-3804 >> Mobile: 239-633-9703 >> >> >> >> Confidentiality Notice: >> This e-mail message, including any attachments, is for the sole use of the intended recipients and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message. >> -----Original Message----- >> From: Sprinklerforum >> [mailto:sprinklerforum-boun...@lists.firesprinkler.org] On Behalf Of >> Travis Mack >> Sent: Wednesday, May 06, 2015 12:43 PM >> To: sprinklerforum@lists.firesprinkler.org >> Subject: Re: Attic >> >> It is not fire treated. I already tried that route. I feel like 225 would be acceptable. Which also begs the question, would ex cov be acceptable? It is unobstructed construction. I believe the ex cov sprinklers are allowed for unobstructed combustible. >> >> Just a rare situation. >> >> Travis Mack, SET >> MFP Design, LLC >> "Follow" us on Facebook: >> https://www.facebook.com/pages/MFP-Design-LLC/92218417692 >> Send large files to MFP Design via: >> https://www.hightail.com/u/MFPDesign >> >> Sent from my iPhone >> >>> On May 6, 2015, at 9:21 AM, Todd - Work <t...@fpdc.com> wrote: >>> >>> Good question. I think you could go to 225, but the Book doesn't >>> address it. I assume the plywood is not fire treated? Most of the >>> times I see this arrangement, the plywood is treated. >>> >>> Todd G Williams, PE >>> Fire Protection Design/Consulting >>> Stonington, CT >>> www.fpdc.com >>> 860-535-2080 (ofc) >>> 860-608-4559 (cell) >>> Sent using CloudMagic >>> [https://cloudmagic.com/k/d/mailapp?ct=ti&cv=6.0.64&pv=8.2] >>> On Wed, May 6, 2015 at 12:04 PM, >>> sprinklerforum@lists.firesprinkler.org >>> <sprinklerforum@lists.firesprinkler.org> wrote: >>> For an attic with light gauge steel trusses spaced 24" on center and >>> plywood deck sheathing, would the spacing be limited to 130 sq ft or >>> would 225 be acceptable? Slope is 3:12. >>> >>> Travis Mack, SET >>> MFP Design, LLC >>> "Follow" us on Facebook: >>> https://www.facebook.com/pages/MFP-Design-LLC/92218417692 >>> Send large files to MFP Design via: >>> https://www.hightail.com/u/MFPDesign >>> >>> Sent from my iPhone >>> _______________________________________________ >>> Sprinklerforum mailing list >>> Sprinklerforum@lists.firesprinkler.org >>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >>> l er.org _______________________________________________ >>> Sprinklerforum mailing list >>> Sprinklerforum@lists.firesprinkler.org >>> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >>> l >>> er.org >> _______________________________________________ >> Sprinklerforum mailing list >> Sprinklerforum@lists.firesprinkler.org >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.org _______________________________________________ >> Sprinklerforum mailing list >> Sprinklerforum@lists.firesprinkler.org >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.org > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > _______________________________________________ > Sprinklerforum mailing list > Sprinklerforum@lists.firesprinkler.org > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list Sprinklerforum@lists.firesprinkler.org http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
