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SEC. 91.7207.  SPECIAL REQUIREMENTS FOR THE VERY HIGH FIRE HAZARD SEVERITY ZONE.
   (Title Amended by Ord. No. 176,943, Eff. 10/5/05.)
 
91.7207.1.  Unenclosed Under-floor Areas.  Residential buildings shall have all under-floor areas completely enclosed to the ground with construction as required for exterior walls.
 
   EXCEPTIONS:
 
   1.   Complete enclosure shall not be required where the underside of all exposed floors and all exposed structural columns, beams and supporting walls are protected as required for exterior one-hour fire-resistive construction.
 
   2.   The area under cantilevered balconies and unroofed walking decks need not be considered as under-floor area, provided exposed utilities, pipes or other mechanical devices are not located in the area.
 
91.7207.2.  Utilities.  All utilities, pipes, furnaces, water heaters or other mechanical devices located in an exposed under-floor area of a residential building shall be enclosed with material as required for one-hour fire-resistive construction. Adequate covered access openings for servicing such utilities shall be provided as required by appropriate codes.
 
91.7207.3.  Attic Openings.  (Amended by Ord. No. 179,324, Eff. 12/10/07, Oper. 1/1/08.)  All exterior attic openings shall be protected with a maximum 1/4-inch noncombustible and corrosion-resistant screen.
 
91.7207.4.  Roofing.  (Amended by Ord. No. 179,324, Eff. 12/10/07, Oper. 1/1/08.)  All buildings shall have a fire retardant roofing assembly complying with the requirements of Class A roof covering as defined in CBC Section 1505.  Wood shakes and shingle are not permitted in the VHFHSZ.