Todd,
Have you tried using a 4.2k sprinkler? You aren’t using it to ‘balance the calcs’ but to control the over-discharge due to the small amount of area the sprinklers are covering. Cliff Whitfield, SET President Fire Design, Inc. 940 Summerbrooke Dr Tallahassee, FL 32312 Ph: 828-284-4772 From: Fpdcdesign <[email protected]> Sent: Monday, March 27, 2023 3:08 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Too many sprinklers in the bathroom I am working on a renovation to a college dormitory bathroom. The dorm rooms are around the perimeter and the common bathroom is in the central core. The college is replacing the existing partial height toilet and shower partitions with full height partitions with full height doors. This is in effect creating several small room, each requiring a sprinkler. The number of sprinklers in this 410 sqft space is increasing from 4 to 15. This will be a hydraulic nightmare. The rooms were designed to NFPA 13 Residential and I have not yet found a calc sign that included the bathroom. My guess is that the whole system would be undersized. Since this is not in a dwelling unit and is on a common corridor, 9.2.4.1 does not apply. Room design does not work because all of the sprinklers are either in the space or the communicating space. I have to calculate a 1500 sqft area in order to eliminate the sprinklers in the stalls and showers. Per Chapter 12, residential sprinklers can only be used in dwelling units and adjacent corridors, so that design is out. Any thoughts? 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 email has been checked for viruses by Avast antivirus software. www.avast.com
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