Personally, I always thought that 13D should have been cut off at
three instead of two. That seems to be where the change in
construction occurs between a house and an apartment building. (I
hope I don't end up in to many people's Sprinkler Axis of Evil for
suggesting that.)
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
860-535-2080
www.fpdc.com
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