BUILDINGS . [ 15 of 1889. ] 1123
material not provided for in this ordinance, shall be constructed upwards of
50 feet
with such precautions for the safety of the public as having weight in.
regard to the special purposes for which such building or cluded. No.25 of
structural work is intended to be used, shall be approved by the See
1891,8.4.)
Surveyor General.
Walls .
10. Erery wall constructed of brick, stone, or other hard and Walls.
( No. 25 of
incombustible substance, shall be solid across its entire thickness, 1891.1
and shall be properly bonded and substantially put together with
gouil lime-mortar or cement-mortur', and except where specially
permitied in this ordinance, no part of such wall shall be thicker
than any part underneath it, and all cross-walls and return -walls
shall beproperly bonded into main -walls. Sound black bricks may
be exclusively used in the walls of the two uppermost stories of a
building but not in the walls of the other stories without the approval
of the Surveyor General.
11. Every person who shall erect a new building shall construct External and
every external and every party wall of such building in accordance thickne
party walls
ss of
with the following rules and in every case the thickness prescribed [Ibid. )
shall be the minimum thickness of which such wall may be con
structed .
( a .) Where the wall does not exceed 12 feet in height it shall
be 9 inches thick for its uhole height.
(6.) Where a wall exceeds 12 feet in height but does not exceed
40 feet in height it shall be 13. inches thick for its
whole height
( c.) Where a wall exceeds 40 feet in height but does not exceed
50 feet in height the lowermost story shall be 18 inches
thick and the remainder 13.4 inch : s thick.
(d.) Where a wall exceeds 50 feet in height but does not exceed
60 feet in height the tưo louermoet stories shall be 18
inches thick and the remainder 13. , inches thick.
( e.) Were a wall exceeds 60 feet in height but does not exceed
70 feet in height the lowermost story shall be 22 inches
thick the next two stories above shall be 18 inches thick
and the remainder 13.) inches thick.
( j.) Ilure a wall exceeds 70 feet in height but does not exceed
80 feet in height the two lowermost stories shall be 22
inches thick, the next tiro stories 18 inches thick, and
the remainder shall be 13 inches thick.
12. (1.) No wall shall exceed 35 feet in length clear of any Length of
return or cross wall without the approval of the Surveyor General walls
nor shall any ( No. ,25 of
wall exceed 80 feet in height without the approval of 1891. ]
the Surveyor General.