2113.11.3.2 Lining.
BC § 2113.11.3.2
The inside of the interior wall shall be lined with an approved high-duty refractory brick, not less than 4 1/2 inches (114 mm) thick laid on the 4 1/2-inch bed (114 mm) in an approved high-duty refractory mortar. The lining shall start at the base of the chimney and extend continuously to the top.













