Physical distance. However, if you have two similar runs, you should examine equivalent lengths and pipe sizes.
Note: I have heard of systems not meeting time requirements with 1" pipes run to the ITV, but once replaced with 1½" lines "to match similar conditions of the 1½" branchlines", the time requirements were met. In other words, pipe sizes do matter when estimating the location of the ITV. Duane Johnson, PE Program Manager Division of the Fire Marshal (Support Contractor) Office of Research Services National Institutes of Health 301-496-0487 -----Original Message----- From: Forest Wilson [mailto:[email protected]] Sent: Monday, July 19, 2010 2:04 PM To: [email protected] Subject: RE: dry inspectors test "distance" Insofar as I believe this requirement was present prior to the requirement that all systems are hydraulically calculated, I would say the intent is to be as physically distant as possible. But, I am not certain this requirement pre-dated the hydraulic calc requirement. Forest Wilson Cherokee Fire -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Todd Williams Sent: Monday, July 19, 2010 1:59 PM To: [email protected] Subject: dry inspectors test "distance" NFPA 13 (2007) section 8.17.4.3.2: "The trip test connection shall be located on the end of the most distant sprinkler pipe..." How is "distant" calculated? I assume this means it is independent of hydraulic remote areas? Does pipe diameter play into this at all? I am working on an attic system with Tyco Attic BB and AP sprinklers and the physically distant is very different than the hydraulically remote area. Todd G. Williams, PE Fire Protection Design/Consulting Stonington, CT 860.535.2080 www.fpdc.com _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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 [email protected] http://fireball.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 [email protected] http://fireball.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)
