I'm not an IBC guy, but I don't think a 2-hour wall creates separate buildings in accordance with the model building code (2019 NFPA 14 section A7.10.1.2.3.1).
And if that door in the 2-hour wall is considered an exit opening of a horizontal exit, you may be required to provide additional hose connections there (section 7.3.2.2). Ed Kramer From: [email protected] <[email protected]> Sent: Wednesday, April 3, 2024 8:43 AM To: 'Discussion list on issues relating to automatic fire sprinklers' <[email protected]> Subject: [Sprinklerforum] Standpipe Calculations Asking this on behalf of Rowe Sprinkler Systems (Temporally Un-Retired) We have a 4-story modular apartment building sprinklered in accordance with NFPA 13R with allowed exceptions, with 4 standpipes. The standpipes are connected at the 1st floor level. One each at the ends of the L shaped building and two at the approximate mid-point on either side of a 2-hour separation wall with self-closing, rated doors in the corridor. The question is for purposes of calculating the standpipe can these be treated as two separate buildings? For example, 250 gpm at the far end of the 4th floor, 250 gpm at the far end of the 3rd floor and 250 gpm at the at the connecting point of the middle standpipe, for a total of 750 gpm. Or do we have to calculate the additional standpipes up to 1250 gpm. Available water is the issue. Richard L. Mote CET Rimrock Design Services, LLC Middleburg, PA 17842 Mobile 570-541-2685 EMAIL [email protected]<mailto:[email protected]> WEB: www.rimrockdesignservicesllc.com
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