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Unformatted text preview: cept, that where a lining of firebrick is used, such walls shall not be less than 200 millimeters in thickness. The firebox shall not be less than 500 millimeters in
depth. The maximum thickness of joints in firebrick shall be 10 millimeters.
Metal hoods used as part of a fireplace or barbecue shall be not less than No. 18 gauge copper,
galvanized iron, or other equivalent corrosion-resistant ferrous metal with all seams and connections of
smokeproof unsoldered construction. The hoods shall be sloped at an angle of 45 degrees or less from
the vertical and shall extend horizontally at least 150 millimeters beyond the limits of the firebox. Metal
hoods shall be kept a minimum of 400 millimeters from combustible materials.
Approved metal heat circulators may be installed in fireplaces.
(4) Smoke Chamber
Front and sidewalls shall not be less than 200 millimeters in thickness. Smoke chamber back
walls shall not be less than 150 millimeters in thickness.
(5) Fireplace Chimneys
Walls of chimneys without flue lining shall not be less than 200 millimeters in thickness. Walls
of chimneys with flue lining shall not be less than 100 millimeters in thickness and shall be constructed
in accordance with the requirements of this Code.
(6) Clearance to Combustible Materials
Combustible materials shall not be placed within 50 millimeters of fireplace, smoke chamber, or
chimney walls when built entirely within a structure, or within 25 millimeters when the chimney is built
entirely outside the structure. Combustible materials shall not be placed within 150 millimeters of the
fireplace opening. No such combustible material within 300 millimeters of the fireplace opening shall
project more than 3 millimeters for each 25 millimeters clearance from such opening. No part of metal
hoods used as a part of a fireplace, barbecue or heating stoves shall be less than 400 millimeters from
combustible material. This clearance may be reduced to the minimum requirements set forth in this
(7) Area of Flues, Throats, and Dampers
The net cross-sectional area of the flue and of the throat between the firebox and the smoke
chamber of a fireplace shall not be less than the requirements to be set forth by the Secretary. Where
dampers are used, they shall be of not less than No. 12 gauge metal. When fully opened, damper opening
shall be not less than ninety percent of the required flue area. When fully open, damper blades shall not
extend beyond the line of the inner face of the flue.
(8) Lintel – Masonry over the fireplace opening shall be supported by a non-combustible
lintel. (9) Hearth – Every fireplace shall be provided with a brick, concrete, stone, or other
approved non-combustible hearth slab at least 300 millimeters wider on each side then the fireplace
opening and projecting at least 450 millimeters therefrom. This slab shall not be less than 100
millimeters thick and shall be supported by a non-combustible material or reinforced to carry its...
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This note was uploaded on 09/22/2013 for the course ARIDBE AR taught by Professor Any during the Fall '12 term at Mapúa Institute of Technology.
- Fall '12