I did a large double interlock preaction system about a year ago. The calculated time and actual time were within 2 seconds. I don't know if that was an anomoly or not since it was the only one I was involved in. The delivery time was faster than the calculated time.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - FPDC Sent: Friday, February 01, 2008 9:53 AM To: [email protected] Subject: Re: Parking Garage Sprinkler System /FDT program How accurate is the FDT program based on comparison to field tests? At 11:27 AM 2/1/2008, you wrote: >Reza: >As Ron points out the FDT program is expensive, but you may actually >save the cost of the program in this one installation if you can reduce >from 4 dry systems to just 2. We all need tools to do what we do and >FDT is just another tool. > >Thom McMahon >Firetech, Inc. >2560 Copper Ridge Dr >Steamboat Springs, CO 80488-2136 >Tel: 970-879-7952 >Fax: 970-879-7926 >----- Original Message ----- From: "Ron Greenman" ><[EMAIL PROTECTED]> >To: <[email protected]> >Sent: Friday, February 01, 2008 8:35 AM >Subject: Re: Parking Garage Sprinkler System *** > > >>Consider low pressure DPVs if you have no way to determine trip time >>(the expensive program). low pressure DPVs work on about a 30:1 >>differential rather than the more typical 6:1. >> >>On Feb 1, 2008 7:06 AM, George Church <[EMAIL PROTECTED]> wrote: >>>Is there a code requirement to provide hose valves in a parking >>>garage in a 2-story? >>> >>>Would it make sense to toss em in the stairs and connect only to an >>>FDC to effect a dry standpipe ? >>> >>>FDT water delivery would answer your question on how long it will >>>take to trip/fill/and spurt water outa the ITC. If you depend on >>>slapping an accelerator on after you flunk your first time trial, you >>>may find out that its not enough and it's a little late and a lot >>>expensive to slap in that other DPV, bulk, re-calc, resubmit, watch >>>30 days of calendar time elapse, and meet the opening date. >>> >>>We always toss in a low air supervisory switch and use tank-mounted >>>air supplies. Even if they don't bother to hook up the switch, it was >>>there and (in court) you can point out that you made heroic efforts >>>to save them from themselves but they didn't take advantage of them, >>>so your property carrier doesn't have to pay to thaw out/replace the >>>dry system after a false trip, fire, whatever. After all, they'd have >>>had plenty of time to respond to the warning if they'd bothered to >>>hook it up, and this whole thing wouldn't have >>>happened- so the fault rests on the Owner or someone other than yourself. >>> >>>As Ken points out to me, "You pay me a lot of money to observe 'Yeah, >>>that'll sound good in court'" when I stray from a good decision. >>> >>>-----Original Message----- >>>From: [EMAIL PROTECTED] >>>[mailto:[EMAIL PROTECTED] On Behalf Of >>>[EMAIL PROTECTED] >>>Sent: Friday, February 01, 2008 9:52 AM >>>To: [email protected] >>>Subject: RE: Parking Garage Sprinkler System *** >>> >>> >>>Depending on where your riser is in relation to the remote part of >>>your system you may have to have multiple systems to deal with the >>>time factor. It's a bit hard to determine without actually seeing >>>everything you're seeing. >>> >>>Make the electrical guy move his lights, tell him fire protection is >>>more critical. Maybe he will move, maybe you will have to work >>>around him. >>> >>> >>>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 >>> >>>at the outlet of most remote 1 1/2 in. hose stations should be >>>65 psi for hydraulically designed systems, so I think my fire pump >>>head should be at least 80 psi? What do you think about this fire >>>pump head, do you think it is low, high or good? >>>ANSWER: That can only be answered once you've performed your >>>calculations. Start there and make adjustments accordingly but >>>depending on the configuration of the system, that might be close or >>>a bit low to start with. Another thing to consider is will your fire >>>department use the 1 1/2" fire hoses or will they want to bring their >>>own hoses. If they prefer to provide their own, will they be 1 1/2" >>>or >>>2 1/2" hoses? Here in the States we don't usually provide hoses since >>>most people would hurt themselves trying to act like a fireman. We >>>usually provide hose connections for the fire department to use. It >>>is a matter of whether you intend to have these hoses handled by >>>non-fire fighters or professional fire fighters. Plus hoses left in >>>places like this >>> >>> >>>_______________________________________________ >>>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) >> >> >> >>-- >>Ron Greenman >>at home.... >>_______________________________________________ >>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) >> > >_______________________________________________ >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) Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut www.fpdc.com 860.535.2080 _______________________________________________ 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) __________ NOD32 2844 (20080201) Information __________ This message was checked by NOD32 antivirus system. http://www.eset.com _______________________________________________ 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)
