UH-OH Don't think you can mix the two agents! The subfloor and the room are actually 1 hazard IMHO.
Burton Ford SET, CFPS Member AFAA [EMAIL PROTECTED] 267-487-1000 Fax 267-487-1010 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. Thank you. Cintas Corporation -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reza Esmaeili Sent: Thursday, August 23, 2007 11:14 AM To: [email protected] Subject: RE: Carbon Dioxide System Discharge Time Prahl, Actually it is a Computer room subfloor with electrical equipment and cable runs, the computer room is protected with FM-200, that's why we are thinking about carbon dioxide. Thanks, Reza [EMAIL PROTECTED] wrote: Can the room be occupied at any time either by service personnel or other occasional operators? Typically the answer would be yes as all equipment needs human intervention at some time. What Jim is saying is that a Pre-action sprinkler system would actually be the best choice and the most cost effective with something like FM-200 as the next choice instead of CO2. There are some serious life safety issues you must consider when using CO2 in potentially occupied spaces. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Reza Esmaeili Sent: Thursday, August 23, 2007 10:59 AM To: [email protected] Subject: Re: Carbon Dioxide System Discharge Time Jim, I forgot to explain, the room doesn't have any operators at all, and carbon dioxide is the best choice. Thanks, Reza [EMAIL PROTECTED] wrote: Reza: I would not recommend a CO2 system as it is potentially too dangerous. I would consider a clean agent sytem per NFPA 2001. Hopefully, this is only a back-up to a wet pipe system, which is still my favorite. Regards, James L.(Jim) Roberts, PE, SET Fluor Corporation 100 Fluor Daniel Drive - C104F Greenville, SC 29607 864.281.5149 864.281.4916(Fax) Reza Esmaeili Sent by: To [EMAIL PROTECTED] [email protected] prinkler.org cc 08/23/2007 10:18 AM Please respond to Subject sprinklerforum Carbon Dioxide System Discharge Time Hi all, For designing a total flooding high pressure carbon dioxide system in a 3,500 cubic feet computer room with electrical equipment and cable runs, I have specified my room as "Dry electrical hazard" with flooding factor of 0.083 lb/cubic.feet and 50% design concentration according to NFPA-12. My questions are as below: 1)- Is a computer room fire a deep seated fire? 2)- NFPA 12 states that "For deep-seated fires, the design concentration shall be achieved within 7 minutes, but the rate shall be not less than that required to develop a concentration of 30 percent in 2 minutes." Is it a problem if the total discharge time would be only 1 minute for this case? Many thanks for your help in advance. Reza --------------------------------- Pinpoint customers who are looking for what you sell. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) ------------------------------------------------------------ The information transmitted is intended only for the person or entity to which it is addressed and may contain proprietary, business-confidential and/or privileged material. If you are not the intended recipient of this message you are hereby notified that any use, review, retransmission, dissemination, distribution, reproduction or any action taken in reliance upon this message is prohibited. If you received this in error, please contact the sender and delete the material from any computer. 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