View report page

168
may be. The maximum height fixed by Sec. 47 is 80 feet, but
two storeys may be built in addition in the roof, and turrets and
other architectural ornaments are not included in the height. In
the case of dwelling-houses to be occupied "by persons of the
working class" erected within the "prescribed distance," the
height of such building is not to exceed "the distance of the
front or nearest external wall of such building from the opposite
side of " the street.
Where there is a habitable basement to a dwelling-house,
there must be in rear of the house an open space reserved for
such basement of at least 100 square feet, on which nothing may
be erected. It is not necessary that the rear boundary of such
space should be at the rear boundary of the curtilage. To every
house there must be in the rear, an open space of at least 150
square feet, which space must extend along the whole width of
the house, and for 10 feet from the back wall of the building.
Under certain circumstances, this space may be occupied by
buildings not exceeding 9 feet in height. For fixing the height
of the building in reference to the open space in rear, Sec. 41
prescribes certain rules with regard to the manner of setting oft a
''diagonal line,'' which is to make an angle of 63.5 with a
"horizontal line" at a distance of 10 feet from the rear wall of
the building. Both the lines are defined and their manner of
setting off described in the 41st Sec. No part of the building,
except dormers, chimneys, and ornaments, are to be constructed
outside the limits of the diagonal line.
Sec. 45 prohibits the construction of shafts in the centre of a
building for lighting habitable rooms, except under certain conditions,
(i) if the depth of the court from the parapet to the
ceiling of the ground storey exceeds the length or breadth of the
shaft, an opening for purposes of ventilation must be made in the
basement of the building connecting the shaft with the external
air; and (ii) the width of the shaft at the level of the windowsill
of any room, must be equal to at least one half the length of
the diagonal line from such window-sill to the opposite parapet.
In the case of any offsets built from the rear wall of a dwelling
house, the interval between any two offsets must be equal to at