I think I have this one, but could use a little more ammo. I walked through an old mill building this morning with an old OH pipe schedule system. (They want to convert from wet to dry). In the building, they have some 8 ft storage of a Group A plastics in cardboard cartons and well as 2 piles of idle pallets to 8 ft. The owner is claiming that the pipe schedule is grandfathered and the system does not need to meet the hydraulic criteria. I disagree and am basing most of my argument on the water supply requirements in 11.2.2 (NFPA 13, 2002 edition). Any other thoughts?

Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, CT
860.535.2080
www.fpdc.com

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