Thanks Kurt -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kurt Kingston Sent: Wednesday, March 07, 2007 11:48 AM To: [email protected] Subject: RE: Underground Material...
Charles, Inserted is a copy of the earlier/similar question and some of the responses: <paste:> "...Here in San Diego County, over the course of the past 15-20 years, I have personally been involved with, or heard of literally dozens (can't even guess at the number, really) of UG failures from C-900 and AC piping that were run under footings and which failed (some spectacularly) due to compression from settlement of the building. I think that the intent of 10.6 (NFPA 13, 2002 ed.) is that pipe and fittings should be of a type and design and arrangement that mitigates the potential damage from running under footings where it's absolutely. Taken literally, one could say that a tunnel under the footing might be required. Now, I'm admittedly speaking from a warm-weather perspective, where we run UG mains on a 4'-0" trench bed. If you're in a freeze zone and running an 8'-0" trench, a good soils engineer would likely tell you that the pipe under the footing will never be influenced by building settlement. I would still require D.I. on the spigot piece, in any case. Steve Leyton Protection Design & Consulting -----Original Message----- From: Bob Knight [mailto:[EMAIL PROTECTED] Sent: Friday, May 05, 2006 8:44 AM To: [email protected] Subject: RE: Underground stub-in requirements Gregg, We have had this happen several times over the last few years. In every case the C-900 has been removed and replaced with DI or In-Builds. One of the reasons lies with NFPA 13-10.1.4 which states that the pipe needs to be "fire resistive". C-900 is not listed for exposed aboveground applications. This could cause a potential catastrophic failure at the point of connection to the overhead piping in a fire situation. Also, look at the Annex on A.10.1. It sates here that piping that is exposed should be considered aboveground. Bob Knight ..." <end of paste> -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Haugen, Charles Sent: Wednesday, March 07, 2007 8:28 AM To: [email protected]; [EMAIL PROTECTED] Subject: Underground Material... Sorry if this gets posted 2x... CAN the underground stub-in (Vertical) be of PVC material? (Blue Brute eq'.) If so, what precautions are necessary? A MN job in question... Chuck Haugen Go Twins!! Red Sox are overrated! :) Sincerely, Charles L. Haugen, Jr. Fire Sprinkler CAD Designer SIMPLEXGRINNELL LP - FARGO #357 DIRECT: 701-639-1406 FAX: 701-280-2955 TELE: 800-342-4668 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
