You can’t call it noncombustible just because it is fire rated. Noncombustible means the material can not burn and limited-combustible has like 1/3 the fuel load of cellulose material and a bunch of other restrictions. The interior of the cavity it is exposed wood. The INSIDE of this fire rated cavity is combustible. You then look at the 8.15.1 family of allowance whereby sprinklers can be omitted and finish the journey in chap 11 to see if the size of the remote area must be doubled. Based on the drawing there are allowances in both 8.15.1 and ch 11 that negates the consequences of unprotected concealed combustible spaces. Although its the end resulting you are looking for, the terms used along the way make a difference.
Also apply care when stating the construction types. Other than having different portions of a single structure being separate buildings with one a IA and the other a V-A (like a pedestal assembly), you can’t have both in a single building. Roland Roland Huggins, PE - Senior VP Engineering American Fire Sprinkler Assn. Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> Fire Sprinklers Saves Lives > On Jul 31, 2017, at 2:40 PM, Rocci Cetani 3 <[email protected]> wrote: > > Steve, > > Luckily this is one of the more reasonable AHJ’s. Yes this a 4 story building > that is type I-A and V-A construction. Thank you, always nice to have one > of the big dogs confirm my thoughts. > > Rocci Cetani III, CET > Senior Designer > Water-Based Fire Protections Systems Layout, Nicet Level III > > Northern California Fire Protection Services Inc. > 16840 Joleen Way Bldg. A > Morgan Hill, CA 93037 > P-(408) 776-1580 EXT.111 > F-(408) 776-1590 > > > [email protected] <mailto:[email protected]> > www.norcalfire.com <http://www.norcalfire.com/> > > CONFIDENTIALITY NOTICE: This message and any document accompanying it may > contain confidential information > belonging to the sender. The information is intended only for the use of > individual or entity named above. If you are not the intended recipient, or > the employee or agent responsible to deliver this message to the intended > recipient, you are hereby notified that any disclosure, copying or taking of > any action in reliance on the contents of this information is strictly > prohibited. If you have received this transmission in error, please > immediately notify us by telephone to arrange for return of the documents. > > From: Sprinklerforum [mailto:[email protected] > <mailto:[email protected]>] On Behalf Of Steve > Leyton > Sent: Monday, July 31, 2017 2:26 PM > To: [email protected] > <mailto:[email protected]> > Subject: RE: non combustible/limited combustible space > > Rocci: > > We see this condition in SoCal a lot and while I can’t speak for your AHJ’s > up there (a pit full of vipers), we treat this condition as non-combustible > down here and just about everyone on the enforcer side agrees. If I’m > understanding correctly, you have a Type 5A building (please confirm, impacts > my opinion) that I’m assuming is four stories if it’s both rated and > sprinklered per 13. If not 4 stories then they’re taking sprinklers for > something else like area per floor. Anyway, the frame is plywood sheathing > over stick framing with lightweight concrete topping. The underside is > enveloped with two layers of gyp to create a one-hour floor-ceiling assembly. > Then the ceiling drops – where they occur – are non-combustible. You thus > have one-hour capsules around each guest room and the corridor. Presuming > all that, I agree that sprinkler protection is not required above the > ceiling, so long as all combustibles are encapsulated and the floor-ceiling > envelope is taped/mudded/fire sealed to maintain a one-hour fire rating. > > Steve L. > > From: Sprinklerforum [mailto:[email protected] > <mailto:[email protected]>] On Behalf Of Rocci > Cetani 3 > Sent: Monday, July 31, 2017 1:57 PM > To: [email protected] > <mailto:[email protected]> > Subject: non combustible/limited combustible space > > We have a hotel we are working on and we have limited space in the corridors > (surprise surprise) so I am trying to not sprinkle the concealed space in > the corridor. Situation is a concrete deck with min. ½” plywood sheathing > below it followed by 2x8 wood joists with (2) layers of 5/8” type X gyp. The > ceiling below is 1 5/8” metal joists with 1 layer of 5/8” type X gyp , > attached directly to ceiling joists. ( We have roughly 12” from bottom of > (2) layers of gyp to top of ceiling framing.) Because the 2x8 are covered > with 2 layers of 5/8” gyp can I consider this space non/limited combustible > per 8.15.1.2.2? (BTW the architect is calling this out as a 1 hour rated > assembly.) > > Thank you > > Rocci Cetani III, CET > Senior Designer > Water-Based Fire Protections Systems Layout, Nicet Level III > > Northern California Fire Protection Services Inc. > 16840 Joleen Way Bldg. A > Morgan Hill, CA 93037 > P-(408) 776-1580 EXT.111 > F-(408) 776-1590 > > > [email protected] <mailto:[email protected]> > www.norcalfire.com <http://www.norcalfire.com/> > > CONFIDENTIALITY NOTICE: This message and any document accompanying it may > contain confidential information > belonging to the sender. The information is intended only for the use of > individual or entity named above. If you are not the intended recipient, or > the employee or agent responsible to deliver this message to the intended > recipient, you are hereby notified that any disclosure, copying or taking of > any action in reliance on the contents of this information is strictly > prohibited. If you have received this transmission in error, please > immediately notify us by telephone to arrange for return of the documents. > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > <mailto:[email protected]> > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > <http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org>
_______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
