NFPA 13 has clear requirements which do not encourage pipe to be routed underneath buildings (NFPA 13 2016 Section 10.4.3 / 2019 Section 6.4.3).
As best I can tell NFPA 13R does not have similar provisions, although the reasoning for not routing underneath is the same (pipe can become compromised by building settling, leakage is extremely difficult to repair, leakage could cause significant building damage). Do I have any justification to not allow pipe to be run underneath a building designed under NFPA 13R? The project at hand is an attached block of apartments that has a breezeway in-between, and the contractor is looking to run pipe back underground (below footings and the breezeway sidewalk) to serve the block of apartments on the opposite side. Posted anonymously by a member for discussion. Discuss this | Subscribe
6 Comments
2/6/2019 10:51:28 am
Would you not want to consider that part of the installation as underground fire main, complete with inspection for depth-of bury, size of main, etc.?
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PETE
2/6/2019 10:52:24 am
NFPA 24 (2016) 10.4.3.1.2 piping shall be installed minimum of 12 in. below building foundations or footers.
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WES
2/6/2019 10:58:28 am
I don't think the breezeway sidewalk is the issue though.
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PETE
2/6/2019 03:14:41 pm
Wes,
WES
2/6/2019 03:35:22 pm
Thanks so much Pete.
Leroy
2/6/2019 09:49:11 pm
Very frequently we run into contractors that don't want to opt for the creative options. We usually end up running copper from an interior wall under the breezeway and back up inside the adjacent unit. This "loop" is detailed in the submittals and submitted to the AHJ. In our area the FM usually elects to witness a 200 psi test on the loop before the slab is poured.
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