The 14 states that standpipes shall be interconnected at the base or as close to the base as possible. In this case, if the field conditions don't allow it to be at the base, you can certainly run it up in the attic, so long as you can prove hydraulically that the required flow and pressure are available at the remote hose connections from the FDC. There is a proposal in the current cycle that is intended to clarify intent regarding protection of piping; it's not really a change so much as an improvement on the wording (right Roland?). Horizontal piping requires protection equal to the stair shaft rating in unsprinklered buildings, except for branch lines to individual hose connections. Horizontal piping does not require special protection in buildings furnished throughout by an approved automatic sprinkler system, which the standard very clearly states may be either a 13 or 13R system as prescribed by the building code. So if it's fully sprinklered, I think you're still okay, even if the attic itself isn't fire protected.
The foregoing is my opinion only and does not necessarily represent the opinion or intent of the NFPA 14 Technical Committee on Standpipe and Hose Systems. Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of George Medina Jr Sent: Friday, November 21, 2008 10:28 AM To: [email protected] Cc: [EMAIL PROTECTED] Subject: Standpipe lateral piping In 13R attic NFPA 14 6.1.2.2 Standpipes and lateral piping supplied by standpipes shall be located in enclosed exit Stairways or shall be protected by a degree of fire resistance equal to that required for enclosed Exit stairways in the building in which they are located. 6.1.2.2.1 In buildings equipped with an approved automatic sprinkler system, lateral piping to 2½ in. hose connections shall not be required to be protected. I have a situation in a 4 story high price condos in Hawaii where there is no room to run our lateral piping to our standpipes on the ground level. The only option is a top feed standpipe system running through the attic (or building soffits on the first floor which they would prefer not to do). Does the above section 6.2.2.1 imply a full 13 system or an approved system for that building (13R). (There are no sprinklers in attic). George Medina Jr. Sr. Fire Sprinkler Designer 95-1015 Ka'apeha Pl. Mililani, HI 96819 808-388-5974 CL# _______________________________________________ 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) __________ Information from ESET NOD32 Antivirus, version of virus signature database 3631 (20081121) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 3631 (20081121) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com
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