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Steel fireplace units are permitted to be installed with solid masonry to form a masonry fireplace provided that they are installed according to either the requirements of their listing or the requirements of this section. Steel fireplace units incorporating a steel firebox lining shall be constructed with steel not less than 1/4 inch (6.4 mm) in thickness, and an air-circulating chamber that is ducted to the interior of the building. The firebox lining shall be encased with solid masonry to provide a total thickness at the back and sides of not less than 8 inches (203 mm), of which not less than 4 inches (102 mm) shall be of solid masonry or concrete. Circulating air ducts employed with steel fireplace units shall be constructed of metal or masonry.

Related Code Sections

2111.6.1 Masonry, Steel Fireplace Units
Steel fireplace units are permitted to be installed with solid masonry to form a masonry fireplace provided that they are installed according ...
2111.6.1 Masonry, Steel Fireplace Units
Steel fireplace units are permitted to be installed with solid masonry to form a masonry fireplace provided that they are installed according ...