A supply calc (calculating from the point of service to the remote area) determines the maximum density of water that the sprinklers can flow given that supply. A demand calc (calculating from the remote area back to the source) calculates for a specific density and then tells you what the safety factor is of that supply. We occasionally use supply calcs for areas we may expect to be modified to a higher occupancy in the future, or to consult with an owner to give them an idea of what the maximum storage or occupancy arrangement for an existing area might be. Generally the demand calculation from the remote area working back to the supply is the most common calc though. Mike Morey, SET Sprinkler Designer BMW Constructors, Inc. O: 317.651.0596 | C: 317.439.2695 www.bmwc.com <https://owa.bmwc.com/exchweb/bin/redir.asp?URL=http://www.bmwc.com>
________________________________ From: [email protected] on behalf of Anderson, Worth Sent: Fri 3/25/2011 9:40 AM To: [email protected] Subject: What is the difference when performing hydraulic calculations from point of service to most remote area, compared to most remote area to point of service? (NFPA 13 CH 14.4.4.4.5) Worth Anderson This e-mail transmission contains information that is intended to be confidential and privileged. If you receive this e-mail and you are not a named addressee you are hereby notified that you are not authorized to read, print, retain, copy or disseminate this communication without the consent of the sender and that doing so is prohibited and may be unlawful. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please delete and otherwise erase it and any attachments from your computer system. Your assistance in correcting this error is appreciated. _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
