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605.1 General
Chimneys serving fireplaces, barbecues, incinerators or decorative heating appliances in which solid or liquid fuel is used, shall be provided with a spark arrester. Spark arresters shall be constructed of woven or welded wire screening of 12 USA standard gage wire (0.1046 inch) (2.66 mm) having openings not exceeding 1/2 inch (12.7 mm).
605.2 Net Free Area
The net free area of the spark arrester shall be not less than four times the net free area of the outlet of the chimney.

Related Code Sections

Section 605 Fire Protection Requirements, Spark Arresters
with a spark arrester. Spark arresters shall be constructed of woven or welded wire screening of 12 USA standard gage wire (0.1046 inch) (2.66 mm) having ...
Section 605 Fire Protection Requirements, Spark Arresters
with a spark arrester. Spark arresters shall be constructed of woven or welded wire screening of 12 USA standard gage wire (0.1046 inch) (2.66 mm) having ...
Section 605 Fire Protection Requirements, Spark Arresters
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605.2 Fire Protection Requirements, Net Free Area
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2404.15.2 Tents and Other Membrane Structures, Venting
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