Fireplace Hearth Extension Code Requirements
Under some circumstances the minimum depth of a hearth plate is 12mm see below.
Fireplace hearth extension code requirements. Hearth extensions will need to be at least 2 inches thick. Requirements for a gas fireplace hearth material. Your fireplace hearth must extend at least 16 inches beyond the fireplace opening and at least 8 inches on either side of the firebox according to the international code council.
Hearth extension shall extend at least 16 inches in front of and 8 inches beyond each side of the fireplace opening. Also the hearth extension must extend at least 16 from the front of the fireplace and 8 on the sides for smaller fireplaces. The minimum thickness of hearth extensions shall be 2 inches 51 mm.
Also the hearth extension must extend at least 16 from the front of the fireplace and 8 on the sides for smaller fireplaces. Exception where the bottom of the firebox opening is raised not less than 8 inches 203 mm above the top of the hearth extension a hearth extension of not less than 3 8 inch thick 10 mm brick concrete stone tile or otherapprovednoncombustible material is permitted. Where the fireplace opening is 6 square feet 0 6 m 2 or larger the hearth extension shall extend not less than 20 inches 508 mm in front of and not less than 12 inches 305 mm beyond each side of the fireplace opening.
Appropriate hearth materials are tile. There shall be a minimum distance of 36 inches from the back of the firebox to the end of the hearth extension. Floor distance to combustibles.
When the opening of the fireplace is at least 6 square feet the hearth extension needs to extend at least 20 from the front of the fireplace and 12 on the sides. When the opening of the fireplace is at least 6 square feet the. Side clearance to.
The hearth and hearth extension should be 36 inches from the back of the firebox if the firebox is less than 6 square feet. A hearth must extend a minimum of 300mm 12 inches in front of the fire or stove and 150 mm 6 inches to the side of the fire or stove see diagram 4.
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