I am looking in the book for the duration of the system supply. I see that the duration varies form what I can see it goes from 60-150 minutes. we are working with the 2002 edition of NFPA 13. I have a Class IV commodity and according to 12.2.1.2 it says i need 150 min supply. I just want to make sure I am on the right path.
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hose duration
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