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南非土木工程施工标准 V部分 空间加热 英文原文节选 20100079 3-22

GENERAL
The regulation contained in Part V of the National Building Regulations shall
be deemed to be satisfied where any flue pipe, chimney, hearth or fireplacecorn--
plies with deemed-to-satisfy rules contained in the followiw provisions of this
Part.
FLUE PIPES
No flue pipe shall be designed and installed in such a manner that it will cause
a fire hazard to any adjacent material.
No flue pipe shall be connected to any shaft or duct which forms part of aventi'
lation system. . .
No flue pipe shall be installed in any shaft or duct in which any services which
may be adversely affected by heat are to be situated.
C H I M N EYS
Any chimney which is within or is attached to a building shall comply with the
following requirements:
(a) It shall be designed and erected in non-combustible materials and In such
a manner that it will not cause a fire hazard to any adjacent material.
(b) It shall not be installed in any shaft or duct in which any services which
may be adversely affected by heat are to be situated.
(c) No combustible material such as a timber floor Joist, trimmer or roof truss
shall be built within 200 mm of the inside of such chimney.
(a) Where in any dwelling house or dwelling unit the walls of any chimney
are erected of masonry units such walls shall be of d i d masonry, and
where such walls are less than 190 mm thick such chimney shall be lined
in compliance with subrule W3.3 Provided that any such walls shall not
be reduced to less than 90 mm in thickness.
(b) Without prejudice to the requirements contained in paragraph (a) the thickness
of any chimney wall in any building covered by a combustible roof
shall be not less than 190 mm .
SABS 0400-1990 214
vv3.3 Where any chimney is provided with a flue lining such lining shall be made of
material which will withstand any action of the flue gases and resist, without
cracking or softening, the temperatures to which it may be subjected and it shall
extend throughout the full height of such chimney.
Where any chimney has either a laterally unsupported height greater than 4 m
or a laterally unsupported height greater than six times its minimum lateral
dimension it shall be designed in accordance with the requirements for the design
of structural systems contained in Part B of the National Building
Regulations.
The height of any chimney outlet shall be not less than -
(a) 1 m above the highest point of contact between such chimney and the
roof: Provided that where a roof has an angle of slope on both sides of
a ridge of not less than loo from the horizontal and the centre line of the
flue of the chimney is not more than 600 mm from the ridge, the height
of such chimney outlet shall not be less than 600 mm above such ridge;
(b) 1 m above the highest point of any window or roof light capable of being
opened or any ventilation inlet situated in any roof or external wall where
the horizontal distance from the nearest point of such window, roof light
or opening to a vertical line through the centre of such chimney outlet
is less than 2,3 m;
(c) 1 m above the eaves level in the case of any chimney which does not pass
through the roof of a building but is within 1,5 m of the nearest wall of
such building: Provided that at a gable end of such building such chimney
shall extend not less than 600 mm above the highest point of such
gable end.
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