(1) Where a portion of a street or public place is to be used for, or in connexion with, building work and the space on the sidewalk available to the public will, in consequence, be less than 1,5 metres in width, or if there will in any case be, in the opinion of the local authority, no safe passage for the public, a walkway of not less than 1,25 metres in width, or of such greater width as the local authority may require, shall be constructed for use during the period during which such portion of such street or public place is used for such building work.

(2) Protective railings shall be provided for such walkways.

(3) Ramps or stairways with protective railings shall also be provided for such walkways, where such provision is necessary for the safety or convenience of the public.