No owner or occupant of any house, store or other building shall erect or construct or cause or permit to be erected or constructed or permit to remain erected or constructed, any awning, signboard or other device, structure or thing, in front of any such house, store or other building, on any street in the City when such awning, signboard or other device, structure or thing is less than eight feet, in the case of awnings, and nine feet, in the case of signs, above the surface of the pavement of the sidewalk in front of such store, house or other building. No wooden awning or other roof shall be constructed over any of the sidewalks of the City. All awnings shall be of canvas or other like material, so constructed as to be rolled or folded up to the wall when not in use.