[Ord. 2/7/1905, § 8; as amended by Ord. 4/10/1911, § 1; by Ord. 3/5/1928, § 1; by Ord. 6264, 6/4/1962; and by Ord. 104, 6/13/1968, § 2]
No step, platform, porch enclosure, opening for cellar or cellar door, or similar obstruction shall be erected, built or placed which shall extend into any alley and no step, platform, porch, enclosure, or similar obstruction shall be erected, built or placed so as to extend into any pavement or sidewalk for a greater distance than four feet from the property or building line on streets (other than Lincoln Square) where the street is of the width of 66 feet or more, and on streets of less than 66 feet in width, no such obstruction shall extend into any pavement or sidewalk for a greater distance than three feet from the property or building line and in no case shall any such obstruction (other than on Lincoln Square) extend into any pavement or sidewalk to such distance as to prevent there being four feet of clear space for the passage of pedestrians on the pavement or sidewalk. On Lincoln Square no such obstruction shall be erected, built or placed so as to hinder access to, or unreasonably obstruct the view of, any sidewalk for a greater distance than eight feet from the property or building line and in no case shall any such obstruction extend into the pavement or sidewalk to such a distance as to prevent there being 12 feet of clear space for the passage of pedestrians on such pavement or sidewalk.
No porch shall extend into the pavement beyond the building line on Carlisle, Baltimore, Chambersburg or York Streets within one block of Lincoln Square.
No cellar door or entrances into cellars shall be raised above the level of the pavement or sidewalk, nor be allowed to remain open after dark.