Obviously he forgot that underground supplying a hydrant shall be a minimum of 6". If your FDC is a Hydrant, then your underground must be six inch. Please change all ref. to 6" where 4" is currently required.
Another case of the EOR working outside their area of expertise. You might just want to run the numbers for these 8 risers side by side for the owner, What's in the spec. vs. what is required by code, and let him decide. Knowledgeable engineers can save you money, those that are in over their heads not so much. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of steve Sent: Friday, June 03, 2011 8:21 AM To: AFSA Subject: Re: Stupid comment of the week. Duh. It's obvious that in order to meet the suction demand through the FDC, and still concurrently flow the 8.0K sprinklers, you're gonna need to bump that supply side to 6". Yours in the pursuit of life safety, Steve Leyton, NOTFPE Sent from my Verizon Wireless BlackBerry -----Original Message----- From: Mike Cabral <[email protected]> Sender: [email protected] Date: Fri, 3 Jun 2011 04:00:27 To: <[email protected]> Reply-To: [email protected] Subject: Re: Stupid comment of the week. Sounds like a winner!!! Mike Cabral Cell 314-412-1800 E-Fax 636-438-1338 ________________________________ From: Todd Williams <[email protected]> To: [email protected] Sent: Fri, June 3, 2011 5:11:20 AM Subject: Stupid comment of the week. I am working on a project which has several buildings with 4-8 apartments each. Between 2 and 3 stories. We are designing 13R systems. There is a 4" main coming into the buildings dedicated to the sprinkler system. The engineer is requiring that the riser consist of the following (after the underground with 4" elbow on top): 4" OS&Y valve 4" pipe a minimum of 10 diameters long (40") 4" RPZ with OS&Y valves on either side (RPZs are now required on all new systems in CT) 4" tee which branches to a 4" check valve and a 2-1/2 x 2-1/2 x 4 FDC At this point, we are "permitted to reduce to 2-1/2" if the calcs allow" 2-1/2" OS&Y 2-1/2" alarm check valve 2-1/2" pipe to the top of the riser Here we reduce to 1-1/4" CPVC to feed the system. The reason the engineer gave for requiring the 4" RPZ and FDC is that the fire department requires a 4" connection to be able to fill their trucks from the FDC. He is now confirming this requirement with the local fire marshal. The specification also called for a 13 system with K8.0 extended coverage commercial sprinklers in all areas, including closets and bathrooms. However, the exclusion from 13R for sprinklers in attics and crawl spaces was directly quoted in the spec. The saga continues......... Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ 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) _______________________________________________ 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)
