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2113.11.3 Concrete and Masonry Chimneys for Highheat Appliances

Building Code 2015 of Alabama > 21 Masonry > 2113 Masonry Chimneys > 2113.11 Flue Lining (Material) > 2113.11.3 Concrete and Masonry Chimneys for Highheat Appliances

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2113.11.3.1 General

Concrete and masonry chimneys for high-heat appliances shall comply with Sections 2113.1 through 2113.5.

Chimneys for high-heat appliances shall be constructed with double walls of solid masonry units or of concrete, each wall to be not less than 8 inches (203 mm) thick with a minimum airspace of 2 inches (51 mm) between the walls.

2113.11.3.3 Lining

The inside of the interior wall shall be lined with an approved high-duty refractory brick, not less than 4¹/₂inches (114 mm) thick laid on the 4¹/₂-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.

2113.11.3.4 Termination Height

Concrete and masonry chimneys for high-heat appliances shall extend not less than 20 feet (6096 mm) higher than any portion of any building within 50 feet (15 240 mm).

2113.11.3.5 Clearance

Concrete and masonry chimneys for high-heat appliances shall have approved clearance from buildings and structures to prevent overheating combustible materials, permit inspection and maintenance operations on the chimney and prevent danger of burns to persons.

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