I can’t come up with any great exceptions for the soffit scenario, but personally I’d either try and get them to gyp board over the wood above and if needed board it off every 160 cubic feet to make it meet 9.2.1.11 or stuff it with non-combustible insulation.
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] [cid:[email protected]] From: Fpdcdesign <[email protected]> Sent: Wednesday, October 4, 2023 10:54 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Irregular concealed space sprinkler spacing I am working on a project in a wood frame building where they have ceilings at varying heights. In the high ceiling areas (about 50% of the space), there is 5” between the ceiling and the bottom of the joists. These do not require sprinklers ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message originated outside your organization. ZjQcmQRYFpfptBannerEnd I am working on a project in a wood frame building where they have ceilings at varying heights. In the high ceiling areas (about 50% of the space), there is 5” between the ceiling and the bottom of the joists. These do not require sprinklers per 9.1.2.5<https://urldefense.com/v3/__http:/9.1.2.5__;!!FaxH778!cYzBdsgz8AObkbOYmm-JRNJkKPR9TrVEZ9baALwDLcuDTJbGuVCzJgLKR4CpxZkUI3Vy2oTEqpDONN8rZDA$>. In the low ceiling areas, there is 10” to 12”, so concealed space sprinklers would need to be installed above those. There are also soffits along some walls that are 18” to 24” wide that technically would require sprinklers even though the surrounding areas don’t. Is there a point where I don’t need consider small spaces in placing CC’s? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080<tel:860-535-2080> (ofc) 860-554-7054<tel:860-554-7054> (fax) 860-608-4559<tel:860-608-4559> (cell) This message is for the named person's use only. It may contain confidential, proprietary or legally privileged information. No confidentiality or privilege is waived or lost by any mistransmission. If you receive this message in error, please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient.
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