Have a rated wall or walls installed between sections and use room design method? Ed K
From: Fpdcdesign <[email protected]> Sent: Monday, June 24, 2024 9:52 AM To: Sprinklerforum <[email protected]> Subject: [Sprinklerforum] Reducing dry system area I am working on a building with a unique facad where I am trying to figure out the calcs. Each end of the building has a 24x24 “tower” where the roof slope on 4 sides to a peak. The center of the building over the entry has a 24x17 inverted V sloped roof. Connecting each of these is a mansard. All construction is combustible. The roof slopes are 7:12. The total area is approximately 2000 sqft. The sections are separated by a plywood barrier. The occupancy is Light Hazard. It’s is a dry system so I have to increase the RA by 30%. Since the slopes are steep enough, I have to increase another 30%, for a total of 2535 sqft design area. My layout consists of 27 sprinklers (including 3 attic AS in the center section). No realistic way to decrease due to the arrangement. This totally blows out that calc with a 27 sprinkler flow. Any thoughts on how to decrease the number of sprinklers flowing? I have tried all of my tricks but haven’t come up with anything yet. 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)
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