Agreed. As builts would be nice, but never present. It's really a crap shoot, and the contractor would need to decide if he/she was capable of completing it correctly. I won't touch a storage occupancy for something like this, and less likely to on a building that has multiple uses, flex space ect.
On Wed, Nov 21, 2018 at 11:00 AM Steve Leyton <[email protected]> wrote: > Correct. But if the plate is missing and the basis of the system design > isn’t known and no as-built drawings are available, which branch on the > decision tree do you follow? If it’s a retail center, it MUST be Ordinary > 2, right? If it’s an office building it has to be Light, unless the shell > was designed for Ordinary. Would that be Ordinary 1 or 2? If it’s a > warehouse … ??? Seems to me that many of these situations involve a lot > more than just hanging a new sign, unless you have documented knowledge of > the system design or a UL/FM crystal ball. > > > > SML > > > > > > *From:* Sprinklerforum [mailto: > [email protected]] *On Behalf Of *Matthew J > Willis > *Sent:* Wednesday, November 21, 2018 7:45 AM > *To:* [email protected] > *Subject:* RE: Calculation Plates > > > > The answer to your original question is no. NFPA 25 does not require a > calculation. It requires the plate. > > > > The information on the plate drives the fact that you must now do a > calculation. > > To be correct, you would have to use the Original flow test, as that was > the basis of design. So a new flow test more than likely will not match. > > Getting a new flow test and calc is NFPA 13. Further NFPA 13 involvement > could come into play if the calcs no longer work. > > At this point, you will have moved well beyond 25, and should be operating > under a different scope. > > > > If you really wanted to have some fun.., 25 just requires the placard to > be in place. > > > > What if you see a blank one during the inspection? Per 25, you are > compliant. > > > > > > R/ > > Matt > > > > *Matthew J. Willis, **CWBSP* > > *Design Manager /**3-D** Specialist* > > *Rapid Fire Protection Inc. <http://rapidfireinc.com/>* > > *1530 Samco Road* > > *Rapid City, SD 57702* > > *Office-605.348.2342* > > *Direct Line-605.593.5063* > > *Cell-605.391.2733* > > *Fax:-605.348.0108* > > > > [image: cid:[email protected]] > > > > *From:* Sprinklerforum <[email protected]> *On > Behalf Of *Wayne Cordiner > *Sent:* Wednesday, November 21, 2018 7:56 AM > *To:* [email protected] > *Subject:* Re: Calculation Plates > > > > John, > > > > The key to remember here is in NFPA 25 the intent is to inspect, test and > maintain a previously approved system. With that in mind the plate you’d be > inspecting exists based on the original installation. The data added even > to a new plate should reflect that. > > Regards, > > > > Wayne T. Cordiner, Jr. > > 917-426-5844 > > [email protected] > > > On Nov 21, 2018, at 05:24, John Irwin <[email protected]> wrote: > > I have been in this industry for 25 years. I believe every company I have > ever worked at has done a hydraulic calculation when replacing Hydraulic > Placards due to an inspection deficiency. But yesterday we were having a > discussion here in the office as to whether or not the calculation was > actually required per NFPA 25. There is no information on the plate that > indicates whether or not the system even works … just what is required. > Does your company do a flow test and calculation when replacing missing > plates? And if so, what happens when you discover that the system no longer > works as originally designed? > > > > > > > > John Irwin > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- \ \ (o> -- If life were easy... \ \_/ /) It'd be called your mom... \_/_) _|_
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