At some point, the requirement for the flexible coupling kicks in. Have always understood 9.3.2.3 (1) - 2010 edition, previous ones numbered differently - to include the main system riser, so the flange or adaptive fitting would have to be configured to allow a flex coupling at no more than 24" above the floor.
SL -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mark Sornsin Sent: Tuesday, July 12, 2011 7:17 AM To: [email protected] Subject: RE: Transition from Outside to Inside Bill - I'm going to go on a limb a bit and suggest there is no maximum height. There's underground pipe (CH. 10), above-ground pipe (CH. 6) and the transition piece (23.1.6.1.1). It is implied that underground pipe is only underground. An aggressive AHJ or EOR may argue that the flange must be located at the floor level - so no underground pipe is above-ground and vice versa. I would suggest that it really only matters when dealing with plastic underground transitioning to above-ground pipe. No plastic pipe should be allowed above ground, so the transition should start below grade. I always spec' ductile iron into the building. This meets the intent of 23.1.6.1.1 as a transition. We normally shoot for the transition to the above-ground pipe to occur at 6 to 12 inches above the floor, but there is nothing in 13 that mandates any particular height. Mark A. Sornsin, PE| Fire Protection Engineer Ulteig Engineers, Inc.| Fargo, NDÂ [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bill Brooks Sent: Tuesday, July 12, 2011 8:07 AM To: [email protected] Subject: Transition from Outside to Inside Something I thought I could find but couldn't. What is the maximum height for the floor flange to transition from the below ground pipe to the above ground pipe? (NFPA 13-2010, 6.3 & 23.1.6.1.1) Ductile and plastic are not listed in the Table 6.3.1.1. Bill Brooks William N. Brooks, P.E. Brooks Fire Protection Engineering Inc. 372 Wilett Drive Severna Park, MD 21146-1904 410-544-3620 410-544-3032 FAX 412-400-6528 Cell _______________________________________________ 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)
