Every room to be provided with sky- light or
window.
[cf. s. 160].
Obstruction of windows
in tenement houses.
Open space
between new building
[cf. s. 160].
990
77. No room shall be constructed in any storey of any existing domestic building, or of any domestic building here- after erected, unless such room is provided with a sky-light, or with a window or windows opening either directly or across a verandah or balcony into the external air and having an area, clear of any obstruction to the light, equal to at least one tenth the floor area of such room and being so constructed that at least one half can be opened. In the case of a window or windows the opening shall extend as far as is practicable above the floor level.
Provided that, in the case of existing domestic buildings, the Governor in Council shall have power to modify the requirements of this section in respect to the external air upon such conditions, if any, as may be deemed expedient.
78. No window of any tenement house shall be obstructed by the erection of any structure whatsoever.
Open spaces, lanes, etc.
79. No person who shall erect a new domestic building or alter any existing domestic building on a site excavated out and hill-side. of a slope or declivity shall permit such building or part thereof to abut against the hill-side, but a clear intervening space or area of a width of not less than one-fourth of the height of the cutting shall be left between such building, along its whole extent, and the toe of the cutting: Provided that such inter- vening space or area shall in no case be of a less width than eight feet in any part as measured on the ground level of such building, and shall not encroach in any way upon any street; Provided further that the Governor in Council may grant ex- emption in any case in which the provisions of this section may appear to him to be inapplicable.
Sub-soil drainage of such open spaces.
Structures
in areas
prohibited.
The height of the cutting shall be measured on a vertical line drawn from the toe of such cutting, and extending from the finished ground or concreted surface to a point where it meets a line drawn at an angle of thirty degrees with the horizontal from the top of the cutting.
80. Every person who shall, under the provisions of section 79 leave a clear intervening space or area between a new domestic building and the hill-side, shall make the surface of the floor of such area at least six inches lower than the level of the lowest floor of such building, and he shall, if so required by the Building Authority, lay, to the full extent of such area, along the toe of the slope of the hill-side, and to a depth of at least twelve inches below the surface, a line of hard sound, stone-ware field-pipes, of not less than three inches diameter, for the purpose of effectually draining the sub-soil of such area, and he shall not cause such sub-soil drain to be passed out under the floor of any building, unless any other mode of outlet may be impracticable; and, in such case, he shall cause the sub-soil drain to be so laid under the ground floor of such new building, that there shall be a distance of at least nine inches between the top of such drain and the surface of such ground floor. The floor of every such area shall have a fall of not less than 1 in 40 towards the outlet for the drainage of such area, and shall be covered with a layer of impervious material, as provided for in this Ordinance, and shall be channelled.
81. Every area shall be kept, at all times, free and unobstructed by structures of any kind other than a bridge or flight of steps not exceeding three feet and six inches in
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