RULE 25.6 - MISCELLANEOUS RATING RULES
RULE 25.6A - SINGLE BUILDING - DEFINED
All building or sections of buildings which communicate through unprotected openings shall be considered a single building. Buildings separated by a space are considered separate buildings. Buildings or sections of buildings which are separated by an 8 inch masonry party wall which pierces or meets the underside of the roof and which pierces or extends to the inner side of the exterior wall will be considered separate buildings. Communication between buildings with independent walls or through masonry party walls must be protected by at least a Class A fire door installed in a masonry wall section.
