In addition to the applicable requirements set forth in Section 93-562 (Street wall regulations for certain streets), the provisions of this Section shall apply to buildings on Site 4.

(a)        Street wall location along West 31st and West 32nd Street Extensions

Any portion of a street wall facing the West 32nd Street Extension within 100 feet of Eleventh Avenue shall be set back at least 15 feet from the West 32nd Street Extension street line, which shall coincide with the northern edge of the Site 4 boundary. Any portion of a street wall facing the West 32nd Street Extension that extends beyond 100 feet of Eleventh Avenue, as measured along the West 32nd Street Extension street line, shall be set back at least 30 feet from the West 32nd Street Extension street line. Any portion of a street wall facing the West 31st Street Extension that extends beyond 100 feet of Eleventh Avenue, as measured along the West 31st Street Extension street line, shall be set back at least 15 feet from the West 31st Street Extension street line.

(b)        Building base facing Eleventh Avenue

The provisions of this paragraph (b) shall apply to street walls below a height of 120 feet facing Eleventh Avenue and the West 31st and West 32nd Street Extensions within 50 feet of Eleventh Avenue. Such street walls shall rise without setback to a minimum height of 90 feet and a maximum height of 120 feet. Above a height of 120 feet, all portions of a building facing Eleventh Avenue shall be set back from the street wall of the building at least 15 feet, except such setback distance may include the depth of any permitted recesses. Portions of street walls along the West 31st and West 32nd Street Extensions within 50 feet of Eleventh Avenue need not set back above the maximum base height to allow tower portions that comply with the provisions of paragraph (c) of this Section to rise without setback.

All portions of a building that exceed the maximum base height of 120 feet shall comply with the tower provisions of paragraph (c) of this Section.

(c)        Towers

All stories of a building located partially or wholly above the maximum base height of 120 feet shall be considered a tower and shall comply with the provisions of this paragraph (c). Not more than one tower shall be permitted on Site 4.

(1)        Maximum floor plate

The gross area of any such story shall not exceed 12,000 square feet.

(2)        Maximum length and height

For any portion of a tower above 120 feet, the maximum horizontal dimension, measured in any direction, shall not exceed 145 feet. However, if the angle of the tower’s maximum horizontal dimension is aligned within 15 degrees of a 45 degree line constructed from either the southwest or northeast corner of the Site 4 rectangle, in plan, as shown on Map 2 (Subdistrict F: Site Plan) in Appendix B, then such maximum horizontal dimension measured in this direction may be increased to 160 feet, provided that the maximum dimension measured perpendicular to such increased dimension does not exceed a length of 120 feet.

The maximum height of a tower on Site 4 shall be a minimum of 100 feet taller than any tower located on Site 3.

All towers that exceed a height of 350 feet shall provide articulation in accordance with Section 93-569 (Tower top articulation).