Buildings.
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.
[80]
[CAP. 123
in areas
71. Every area shall be kept, at all times, free and structures unobstructed by structures of any kind other than a bridge prohibited. or flight of steps not exceeding 3 feet and 6 inches in width, nor shall such area be roofed in or covered over with glass or other material. No bridge or flight of steps shall be placed over any window opening into such area. Every area shall be provided with a suitable parapet wall, or safe iron railing or fence, along its upper edge.
[81]
of open
spaces and for domestic
access lanes
buildings.
72. (1) Every domestic building hereafter erected or Provision re-erected shall be provided by the owner with an open space in the rear, or partly in the rear and partly at the side, exclusively belonging to such building, equal in area to not less than one half of the roofed-over area of such building; and the level of such open space shall not be less than 6 inches below the floor of the lowermost storey : Provided that in the case of a domestic building hereafter erected or re-erected on a site leased from the Crown prior to the 21st day of February, 1903, and having a depth of 40 feet or under the open space may be equal in area to not less than one third of the roofed-over area of such building.
(2) In addition to such open space the owner shall provide a lane to the satisfaction of the Building Authority, giving access to some public or private street and shall submit a plan of such proposed lane to the Building Authority for approval. Such plan shall be prepared with a view to promoting uniformity in the laying out of such lanes.
(3) Every lane shall be formed to such levels as the Building Authority may direct.
(4) A lane shall not be required in the case of any detached or semi-detached domestic building which has a side lane or yard extending the entire depth of the building and of a width of not less than 5 feet and also has a clear and unobstructed area in the rear of the building of a depth of not less than 8 feet and extending for the full width of the site, but no such building shall be deemed to be semi-
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