THE HONGKong goverNMENT GAZETTE, 3rd OCTOBER, 1868.
ing of every Chimney a slab of Stone, Slate or other incombustible Substance at the least Twelve Inches longer than the Width of such Opening, and at the least Eighteen Inches Wide in front of the Breast thereof;
12. On every Floor, except the lowest Floor, such Slab shall be laid wholly upon Stone or Iron Bearers, or upon Brick Trimmers; but on the lowest Floor it may be bedded on the solid Ground;
13. The Hearth or Slab of every Chimney shall be bedded wholly on Brick, Stone, or other incombustible Substance, and shall be solid for a Thickness of Seven Inches at the least beneath the upper surface of such Hearth or Slab;
14. No Flue shall be built against any Party Structure, unless a Withe is properly secured thereto, at the least Four Inches in Thickness;
15. No Chimney Breast or Shaft built with or in any Party Wall shall be cut way unless the Surveyor General certifies that it can be done without injuriously affecting the Stability of any Building;
16. No Chimney Shaft, Jamb, Breast, or Flue shall be cut into, except for the purpose of Repair, or doing some one or more of the following things:
Of letting in, or removing, or altering Flues, Pipes, or Funnels for the Conveyance of Smoke, hot Air, or Steam, or of letting in, removing or altering Smoke Jacks;
Of forming Openings for Soot Doors, such Openings to be filled with a close Iron Door and Frame;
Of making Openings for the Insertion of Ventilating Valves, subject to the following restrictions: that no Opening shall be made nearer than Twelve Inches to any Timber or Combustible Substance;
17. No Timber or Woodwork shall be placed:
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any Wall or Chimney Breast nearer than Twelve Inches to the Inside of any Flue or Chimney Opening;
Under any Chimney Opening within Eighteen Inches from the upper Surface of the Hearth of such Chimney Opening;
Within Two Inches from the Face of the Brickwork or Stonework about any Chimney or Flue, where the Substance of such Brickwork or Stonework is less than Eight and a Half Inches thick, unless the Face of such Brickwork or Stonework is rendered;
And no Wooden Plugs shall be driven nearer than Six Inches to the Inside of any Flue or Chimney Opening, nor any Iron Holdfast or other Iron Fastening nearer than Two Inches thereto.
XXII. The following Rules shall be observed as to close Fires, and Pipes for conveying heated Vapour or Water; that is to say :—
1. The Floor under every Oven or Stove used for the purpose of Trade or Manufacture, and the Floor around the same for a space of Eighteen Inches, shall be formed of materials of an incombustible and non-conducting Nature;
2. No Pipe for conveying Smoke, heated Air, Steam, or hot Water shall be fixed against any Building on the Face next to any Street, Alley, Mews, or Public Way;
3. No Pipe for conveying heated Air or Steam, shall be fixed nearer than Six Inches to any combustible materials;
4. No Pipe for conveying hot Water shall be placed nearer than Three
Inches to any combustible materials;
5. No Pipe for conveying Smoke or other Products of Combustion shall be fixed nearer than Nine Inches to any combustible material.
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XXIII. Every Party Arch, and every Arch or Floor over any Public Way or any as to Party Arches Passage leading to Premises in other Occupation, shall be formed of Brick, Stone, or over Public Ways. other incombustible Materials to be approved by the Surveyor General. If an Arch of Brick or Stone is used, it shall, in cases where its Span does not exceed Nine Feet, be of the Thickness of Nine Inches at the least, but when its Span exceeds Nine Feet, be of the Thickness of Twelve Inches at the least; If an Arch or Floor of Iron or other incombustible Material is used, it shall be constructed in such Manner as may approved by the Surveyor General.
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