(1) Where building work involves the demolition of a building, the site of such work shall be enclosed by means of railings, hoardings, cladded scaffolding or covered walkways (hereinafter referred to as “protective structures”) along every boundary between such site and any street or public place:

Provided that, if the building to be demolished is more than 7,5 metres high or is less than half the height of the building distant from such boundary, a hoarding or a covered walkway shall be erected.

(2) Covered walkways shall be erected and retained in position, in accordance with the provisions of section 22.

(3) All gas, electricity, water and other supply-lines, and all sewers and drains, shall be re-laid or shut off and capped before demolition is commenced.

(4) All glass in windows, doors, roof-lights or other places shall be removed from any part of a building before demolishing of that part commences.

(5) Before any structural member of a lower storey is disturbed, the storey above it shall be completely removed.

(6) Structural-steel frames shall be demolished column length by column length in sound structural sequence and floor by floor.

(7) No mechanical method of demolition whereby wrecking is accomplished by smashing with a heavy weight suspended from a boom or hoist, or by the use of a power-shovel, bulldozer, winch or other mechanical contrivance, shall be employed, unless the building, or the remaining portion thereof, to be demolished does not exceed 6 meters in height, and unless a clear zone is maintained during demolition operations, of a width equal to one and a half times the height of such building, or portion thereof, if it is to fall outwards, or 3 meters, if it is to fall inward, between it and a temporary hoarding, which shall be erected around such building or portion thereof.

(8) No person not engaged on such demolition operations shall be permitted to be in such clear zone.

(9) Demolition operations which, in the opinion of the local authority, are likely to endanger the safety of the public shall take place only at times fixed in advance by the local authority, with a view to eliminating, or reducing to a minimum, the likelihood of such danger.