Normally the engineer is supposed to consider this and incorporate some sort of instructions with the bid package. In my opinion, domestic demand should ALWAYS be considered but many times does not change the outcome. If you are only the sprinkler designer how are you supposed to chase down all these other subs in order to find out how much water they are using? It's not the sprinkler designer's job to guess. For example, a military barracks job with multiple buildings in proximity - hundreds of showers at the same time. Perhaps a bottling plant with constant flow. Lawn irrigation systems also. I think that self shut off flows (toilet flush) can be ignored, but others should be considered. The plumbing engineer can (and should) provide a number for these based on Hunter's curve or some other engineering method.
Water tank make-up would be one of the flows to consider. Probably a good practice on every job to send an early RFI and ask about all these domestic flows. Share the problem with others. Bill Brooks William N. Brooks, P.E. Brooks Fire Protection Engineering Inc. 372 Wilett Drive Severna Park, MD 21146-1904 410-544-3620 410-544-3032 FAX 412-400-6528 Cell -----Original Message----- From: sprinklerforum-boun...@firesprinkler.org [mailto:sprinklerforum-boun...@firesprinkler.org] On Behalf Of Brian Harris Sent: Tuesday, July 19, 2011 9:12 AM To: sprinklerforum@firesprinkler.org Subject: Domestic Demand I'm working on an Administration Building that has some really strange underground & plumbing configurations with relationship to the sprinkler riser and it got me to thinking about domestic allowance in calculations. I'm looking for some information that says I don't need to include things like chilled water, water tank make-up, etc. in the hydraulic calculations. I can't remember a situation where I've ever included things like these in my calculations but like I said earlier the incoming water supply has some strange requirements that got me thinking. I know 11.1.4.3 says the minimum water supply requirement shall be for the sprinklers and hose stream, is this enough to hang my hat on? Brian Harris, CET First Defense Fire Protection 11957 Ramah Church Road Huntersville, NC 28078 Phone: 704.948.3506 Fax: 704.948.3507 ======= Email scanned by PC Tools - No viruses or spyware found. (Email Guard: 7.0.0.21, Virus/Spyware Database: 6.17920) http://www.pctools.com/ ======= _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: supp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list Sprinklerforum@firesprinkler.org http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: supp...@firesprinkler.org To Unsubscribe, send an email to:sprinklerforum-requ...@firesprinkler.org (Put the word unsubscribe in the subject field)
