Thanks for all the responses.
The reason is because NFPA 13 does not include ductile iron (ASME B36.10M) in
the acceptable materials table. My opinion is that it is functionally more than
adequate.
Would this be covered by section 1.7 (2016) for alternate arrangements?
J. Scott Mitchell, PE
Fire Protection Engineer |
Projects Engineering
CNS Pantex | 806.477.5883 |
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