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Fireplaces
to have flues.
Chimney
stacks to
BUILDING (CONSTRUCTION) REGULATIONS, 1956
(3) The jambs of every fireplace opening shall be not less than 8 inches wide on each side.
(4) The enclosure and breast of every fireplace opening shall be supported by a lintel of reinforced concrete or steel or an arch of brick or stone.
(5) Every fireplace shall be lined with refractory fire bricks or slabs not less than 2 inches thick set in fireclay.
67. (1) Every fireplace shall be provided with a chimney. (a) Where solid fuel or oil is burnt every fireplace shall have its own Alue.
(3) The flue in every such chimney shall-
(a) where used for a fireplace burning solid fuel or oil be
not less than 71 inches across in any direction;
(b) where used for an open domestic gas fire or other gas
fired appliance----
(i) be not less than 20 square inches in cross sectional area; and
(i) be encased in incombustible material not less than 1 inch thick exclusive of plastering:
Provided that voids may be left in such material enclosing the flue and not connected therewith.
(4) Every such chimney shall
(a) be rendered or pargeted on the inside or lined with fire- clay, stoneware or other like incombustible material; and (b) where used for a fireplace burning solid fuel or oil be made of solid bricks or building blocks, be properly bonded and solidly put together with cement mortar, or of plain or reinforced concrete, not less than 4 inches thick:
Provided that soot doors may be inserted in such chimneys.
68. (1) Every chimney stack shall be carried up above the level of the highest point of its intersection with the adjoining above root. roof or gutter to a height of at least-
be carried
(a) 18 inches where used in connexion with a gas-fired
appliance; or
BUILDING (CONSTRUCTION) REGULATIONS, 1956
(b) 3 feet where used in connexion with a fireplace burning
solid fuel or oil.
(2) The height of every chimney stack measured from the level of the bighest point of its intersection with the adjoining roof or gutter to the top of the stack, shall not exceed 6 times the least horizontal dimension of the stack unless it is adequately secured against over-turning.
(3) The topmost 6 courses of every chimney stack constructed of bricks or building blocks shall be laid in cement mortar, or cement lime mortar containing not less than I volume of cement to every 6 volumes of sand.
(4) (a) Where the height of a chimney stack measured from the level of the highest point of its intersection with the adjoining roof or gutter exceeds 5 feet, the part of such chimney stack above 5 feet may be constructed of metal pipes, adequately stayed to resist wind pressure, and with a cross sectional area not less than three quarters of the cross sectional area of the chimney stack below, and in any case not less than 6 inches in internal
diameter.
(b) Such pipes shall be constructed—
(i) of cast iron, not less than 1 inch thick at any point; or
of
(ii) of mild steel plates not less than 3/16 inch thick;
(iii) if used with a gas-fired appliance, of steel metal of a thickness not less than No, 20 Standard Wire Gauge. (c) All metal in flue pipes shall be protected against corro-
sian.
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89. (r) No timber (other than wood plugs), or other com- Combatible bustible material shall be placed in any wall or chimney within materials In proxi- 9 inches of any flue or the inside of any fireplace opening; mity to
chinmeys. (2) No wood plugs shall be driven into any wall or chimney within 6 inches of any flue or the inside of any fireplace opening:
(3) No woodwork or other combustible material of the sur- round of any fireplace opening shall be fixed round that opening unless it is-