The NFSA addressed this in the May/June issue of Sprinkler Quarterly. I think the wet can be all one system, the dry is a separate system (naturally also the most of concern). I would consult with the AHJ regarding the "end of main" issue. Forest Wilson Cherokee Fire In a message dated 12/16/2008 10:32:27 A.M. Eastern Standard Time, [email protected] writes:
We interpret the 5 year frequency to be by system. However, since we have 150 systems, when we decided to do this, it was proposed to do a statistical sampling to obtain a high confidence factor. We inspected 25 systems using a camera (borescope type) to inspect the internal portions of crossmains and/or branch lines. Typical was 100 to 150 feet of pipe per system. The single head and single cross main cap inspection is questionable in my opinion. You won't see much when you remove these. We did the water testing and we have had pinhole leaks. So enough indicators were there to do an obstruction investigation. The water testing is not a substitute. It is an indicator of the need to do the internal investigation. John Hoffman, P.E. Fire Protection Engineer Facility Engineering Services, KCP, LLC 2000 E. 95th Street Kansas City, MO 64131 Ph: 816-997-7213 [email protected] wrote on 12/16/2008 09:05:45 AM: > NFPA 25 '02 - 13.2.1 requires 5 year opening of one BL through the head and > one CM at an end cap. > > > > Now this seems rather straight forward. But the question is, is this per > system, per building, per floor or what. I have a 3 story and a basement > for four wet floors on one system, no floor controls. On the 3rd story > there is auxiliary dry system that serves an attic. The system is easily 60 > years old. We have to move the FDC connection and do some 50 year testing > of the heads. Seems like these openings should satisfy the inspection > requirement but these aren't at the END of the system. The requirement only > seems to be looking for MIC not considered are other things like rocks or > whatever. > > > > Is there any reason the END is significant? Do you think coincidental > openings at other location even for day work is equivalent? > > > > Should we check per floor? > > > > Should the auxiliary dry be treated as a separate system? > > > > In a multiple system building do you check each system? > > > > Has any one tried the testing of water with the field kits like Potter sells > as an equivalent? If the pipe is hard to reach this seems cheaper and maybe > more accurate vs. the random nature if MIC and it being at the end. > > > > I know the answer probably is the more the better. But in many building > it's tough to reach piping especially at the END if it's all above hard > ceilings. > > > > > > Chris Cahill, P.E. > > Fire Protection Engineer > > Sentry Fire Protection, Inc. > > > > 763-658-4483 > > 763-658-4921 fax > > > > Email: [email protected] > > > > Mail: P.O. Box 69 > > Waverly, MN 55390 > > > > Location: 4439 Hwy 12 SW > > Waverly, MN 55390 > > > > _______________________________________________ > Sprinklerforum mailing list > http://lists.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 http://lists.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) **************Make your life easier with all your friends, email, and favorite sites in one place. Try it now. (http://www.aol.com/?optin=new-dp&icid=aolcom40vanity&ncid=emlcntaolcom00000010) _______________________________________________ Sprinklerforum mailing list http://lists.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)
