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BUILDING (PLANNING) REGULATIONS, 1956
BUILDING (PLANNING) REGULATIONS, 1956
PART IV.
DIAGRAM
4
Buildings for Composite use.
Arsa A
Area of site A.
Non-domestic Factor-F..
Domestic Factor - F1.
Gross volume, Reg 20015 FAWKA. Non-domestic volume required-a-h, -
Permissible domestic volume is Ahs, where his equals h
Volumes may be arranged as desired within the - envelopes shown on Diagram 3 B.
Lighting and ventilation.
25. Every storey of every building used for the purpose of Lighting an office or for babitation shall be provided with effectual means
and ven- tilation, of lighting and ventilation,
26. (1) Every room used for such purposes shall be provided Windows, with natural lighting and ventilation by means of one or more windows which shall open directly into the external air.
(a) Such windows shall be so constructed that-
(a) the aggregate superficial area of the glass in the windows is not less than 1/10th of the area of the floor of the room; (b) the windows can, to an extent at least equal in the aggregate to 1/16th of the area of the floor of the room, be opened in such manner that the top of the opening of each window is at least 7 feet 6 inches above the level of the floor and in the case of detached and semi-detached buildings at least 6 feet 6 inches above the level of the floor.
(3) Where any such window opens on to an enclosed space, the mean height of the walls opposite such a window shall be not more than
times, in the case of a building used for offices, and
t times, in the case of a domestic building, the width of such enclosed space, measured at right angles to the window.
(4) Where any such window opens on to a space enclosed on
three sides, such window shall be sited-
(d) opposite the open side of the space; or
(b) on a wall adjoining the open side and not more than
times the width of such space therefrom; or
(c) where the mean height of the walls opposite such a win- dow is not more than 4 times, in the case of a building used for offices, and times, in the case of a domestic building, the width of such space, measured at right angles to such window,
(5) For the purpose of this regulation—
(a) the height of the wall shall be measured from the level
of the top of the window to the level of the eaves or to the top of the parapet of the wall;
(b) window shall include french window.
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