Steve,
Luckily this is one of the more reasonable AHJs. 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 <mailto:[email protected]> [email protected] <http://www.norcalfire.com/> 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]] On Behalf Of Steve Leyton Sent: Monday, July 31, 2017 2:26 PM To: [email protected] Subject: RE: non combustible/limited combustible space Rocci: We see this condition in SoCal a lot and while I cant speak for your AHJs 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 Im understanding correctly, you have a Type 5A building (please confirm, impacts my opinion) that Im assuming is four stories if its both rated and sprinklered per 13. If not 4 stories then theyre 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]] On Behalf Of Rocci Cetani 3 Sent: Monday, July 31, 2017 1:57 PM To: [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] 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.
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