CO129-554-9 Buildings Ordinance 1935 15-4-1935 - 15-4-1935 — Page 36

13

(2) If any wall exceeds 35 feet but does not exceed 60 feet in length clear of cross walls, the thickness of such wall shall, unless the Building Authority otherwise permits, be in- creased by adding 44 inches to the thickness specified in sub- section (1).

apply to

walls here-

after erected or re-erected.

18. The provisions of section 17 shall also apply, in the Sec. 17 to case of existing buildings, to any walls or portions of walls hereafter erected or re-erected therein : Provided that in

any case where from any cause it is not practicable or desirable to apply such provisions, the thicknesses shall be determined by the Building Authority.

of length

19.-(1) No wall, other than a boundary wall, shall Limitation exceed sixty feet in length, clear of any return or cross wall, of walls. without the approval of the Building Authority.

Cross

A wall shall not be deemed a cross wall for the

purpose walls. of determining the length of any external or party wall unless it is carried up to the top of the topmost storey, and unless in each storey the aggregate extent of the vertical faces or eleva- tions of all the recesses and that of all the openings therein taken together shall not exceed one-half of the whole extent of the vertical face or elevation of the wall in such storey.

over 80 feet

to be

Measurement

(2) No wall shall exceed eighty feet in height without the Walls approval of the Building Authority. The height of every wall in height shall be measured from the level of the adjacent foot-path, or, approved by where no foot-path exists, from the level of the street or Building ground outside to the highest part of such wall or, in the case Authority. of a gable, to half the height of such gable, but shall in no case of height include any portion of a wall which acts as a retaining wall. of walls. Ornamental towers, turrets, or other architectural features or decorations, not exceeding nine feet in height and parapets not exceeding three feet in height shall not be included in measur- ing the height of such wall.

external

than 35 feet

(3) Any external wall of a building exceeding thirty-five Tie-rods feet in length, clear of cross walls, shall be secured at the level required for of each upper floor, and at the ceiling or roof, with wrought- walls more iron tie-rods not less than one and a quarter inches in diameter, in length. spaced not more than twelve feet apart and extending through such external wall and the nearest parallel wall of such build- ing. The tie-rods shall have screwed ends with nuts bearing upon wrought-iron washer plates not less than eighteen inches square by half an inch in thickness, or cast-iron washer plates to be approved by the Building Authority, and the brickwork of each wall for its full thickness and for an area of two feet square round the end of each tie-rod shall be built in cement-

mortar :

Provided that the Building Authority may modify or dis- pense with the requirements of this sub-section whenever he may consider such requirements unnecessary.

of cross

main walls.

20. The thickness of every cross wall shall be at least Thickness two-thirds of the thickness prescribed by section 17 in that walls to be behalf for an external wall or party wall of the same height two-thirds and length and belonging to the same class of building as that that of to which such cross wall belongs, unless, in any particular case, the Building Authority shall specially authorise a less thickness. But if such cross wall supports a superincumbent external wall the whole of such cross wall shall be of the thickness prescribed for an external wall or party wall of the same height and length and belonging to the same class of building as that to which such cross wall belongs.

39