[R.O. 1966 § 22:5-28]
No person shall erect, construct, alter or demolish any building or make any excavation near or along any public street or sidewalk in the City without first having constructed a fence, sidewalk shed or sidewalk bridge for the protection of life and property during the progress of such work, whenever, in the judgment of the Director or his authorized representative, the erection, construction, alteration or demolition of any such building or any such excavation would interfere with the free and unobstructed use of the public street or sidewalk, or be a source of danger to anyone using the public street or sidewalk.