The dry system required flow based on the calc is approximately 290 GPM and required pressure is 90 PSI. But I am not sure how to add the hose allowance to find its impact on required pressure.
P.S. The building does not have a required for a standpipe and none will be used. Thanks for helping! On Mar 4, 2017, at 4:41 PM, Matthew J Willis <[email protected]<mailto:[email protected]>> wrote: And what were the results? You have solved for velocity. That is kind of a lesser concern than available water, and amount required for system. The only way to answer your question is to perform a full hydraulic analysis using Elite. R/Matt Sent from my Verizon 4G LTE Droid On Mar 4, 2017 2:35 PM, very Cool <[email protected]<mailto:[email protected]>> wrote: Elite On Mar 4, 2017, at 4:32 PM, Matthew J Willis <[email protected]<mailto:[email protected]>> wrote: I'll ask this question, what hydraulic calculation software are you using? Matt Sent from my Verizon 4G LTE Droid On Mar 4, 2017 2:28 PM, very Cool <[email protected]<mailto:[email protected]>> wrote: Thanks for your response Art. The hydrant test shows 130 psi at 500 GPM The parking is on ground level and the pipes wound the 10' above the ground floor The new main will only serve the sprinkler with hose allowance. It does not need to serve fire hydrant. Thanks again On Mar 4, 2017, at 3:03 PM, Art Tiroly <[email protected]<mailto:[email protected]>> wrote: From the information presented the question can’t be answered. To do a hydraulic analysis you need: A water flow test near the point of the connection. Length of the underground fire main from the connection to the riser. Elevation of the dry system highest sprinkler. Is there a fire hydrant supplied from the proposed 4” main? If yes then the main shall be 6”. Best analysis is to do a preliminary hydraulic calculation to determine if 4” is adequate. Art Tiroly ATCO Fire Protection/Tiroly 24400 Highland Rd CLE 44143 216-621-8899 216-570-7030 cell From: Sprinklerforum [mailto:[email protected]] On Behalf Of very Cool Sent: Saturday, March 04, 2017 8:52 AM To: [email protected]<mailto:[email protected]> Subject: Size of main service - dry parking garage - Hi: I am trying to find if a 4" main is adequate for a dry system to serve a parking garage. Here is what I am calculating. Would appreciate any feedback: The area of application would be 1500 SF, which needs to increase by 30% as per Section 11.2.3.2.5, to 1950 SF. Water demand = 1950 x .15 = 293 GPM Add 250 hose allowance: 293 + 250=543 GPM Velocity at 4" main and 543 GPM =13.7 FPS, therefore ok Thank you Ramez [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=icon> Virus-free. www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient&utm_term=link> _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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