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 6.

(a)        Height and setback regulations

(1)        Street wall beneath the High Line

The provisions of this paragraph (a) shall apply to street walls on Site 6 beneath the High Line that face West 30th Street, Eleventh Avenue and the Southwest Open Space.

All such street walls shall extend along the entire street frontage of the site, except that along West 30th Street, the street wall shall be no closer to the northerly street line of West 30th Street than the northerly edge of the southern row of structural columns of the High Line, and along the Southwest Open Space and Eleventh Avenue, the street wall shall extend to a point five feet north of the High Line. Ground floor recesses up to three feet deep shall be permitted for access to building entrances.

All such street walls shall rise without setback to a maximum height of the underside of the High Line bed.

(2)        Building base

(i)        Facing Eleventh Avenue and the West 31st Street Extension, north of the High Line

The provisions of this paragraph (a)(2)(i) shall apply north of the High Line to street walls facing Eleventh Avenue, the West 31st Street Extension, portions of street walls facing the High Line within 60 feet of Eleventh Avenue, and portions of street walls facing the Southwest Open Space within 60 feet of the West 31st Street Extension. Such street walls shall rise without setback to a minimum height of 60 feet and a maximum height of 90 feet. Above a height of 90 feet, all portions of a tower, or portions of a transition height located beneath a tower facing Eleventh Avenue, the High Line and the West 31st Street Extension, 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 Southwest Open Space within 60 feet of the West 31st Street Extension need not set back above the maximum base height to allow portions of towers, or portions of a transition height located beneath a tower that comply with the provisions of paragraphs (a)(3) and (a)(4) of this Section, respectively, to rise without setback. These building base provisions may apply along the High Line beyond 60 feet of Eleventh Avenue, up to a maximum distance of 100 feet from Eleventh Avenue.

(ii)        Facing West 30th Street, north of the High Line

The provisions of this paragraph (a)(2)(ii) shall apply to street walls above the High Line bed, facing the High Line beyond 60 feet of Eleventh Avenue, and to those portions of street walls facing the Southwest Open Space that are within 60 feet of the High Line. Such street walls shall rise without setback to a minimum height of 50 feet as measured above the level of the High Line bed, and a maximum height of 60 feet as measured above the level of the High Line bed. Above a height of 60 feet, all portions of a tower, or portions of a transition height located beneath a tower facing the High Line, 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 Southwest Open Space within 60 feet of the High Line need not set back above the maximum base height to allow portions of a tower, or portions of a transition height located beneath a tower that comply with the provisions of paragraphs (a)(3) and (a)(4), respectively, to rise without setback.

All portions of a building that exceed the maximum base height of 90 feet shall comply with the tower provisions of paragraph (a)(4), with the exception of a building which provides a transition height in accordance with the provisions of paragraph (a)(3).

(3)        Transition height

If the outermost walls of all stories of any tower provided in accordance with the tower provisions of paragraph (a)(4) are individually inscribed within a rectangle where the east-west dimension does not exceed a length of 110 feet, a transition height may be provided above the building base in accordance with the provisions of this paragraph (a)(3).

Above the maximum base height, a street wall may rise to a maximum transition height equal to two-thirds of the height of the street wall of the building base facing the West 31st Street Extension. Such a transition height shall not exceed a maximum height of 150 feet, as measured above the West 31st Street Extension street line.

All portions of a transition height shall be set back 30 feet from the street wall of the building base along the West 31st Street Extension and the High Line, except that where towers are provided directly above a portion of the transition height, such a portion of transition height located directly below a tower shall provide setbacks in accordance with the building base provisions of paragraph (a)(2) of this Section.

All portions of a building that exceed the maximum transition height shall comply with the tower provisions of paragraph (a)(4).

(4)        Towers

All stories of a building located partially or wholly above a height of 90 feet, or 150 feet if a transition height is provided in accordance with the provisions of paragraph (a)(3), shall be considered a tower and shall comply with the provisions of this paragraph (a)(4).

(i)        Maximum floorplate

If more than one tower is provided on Site 6, the aggregate gross area of any such tower stories, measured at any height, shall not exceed 25,000 square feet.

(ii)        Maximum length and height

The outermost walls of all stories of a tower, when viewed from above, shall be inscribed within a rectangle where the east-west dimension shall not exceed a length of 160 feet and the north-south dimension shall not exceed a length of 110 feet. Where more than one tower is located on Site 6, each tower shall comply independently with such maximum dimensions.

The aggregate width of street walls of all stories of a tower facing the West 31st Street Extension or the High Line shall not exceed 220 feet within 40 feet of the street wall of the building base.

If more than one tower is provided on Site 6, such towers shall either be equal in height, or the easternmost tower shall have a height greater than the height of the westernmost tower.

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

(b)        Certification to expand Site 6

The area of Site 6, as shown on Map 2 (Subdistrict F: Site Plan) in Appendix B, may be extended westward by up to 40 feet in order to accommodate a public school upon certification of the Chairperson of the City Planning Commission, that:

(1)        the Chairperson is in receipt of a letter from the School Construction Authority that describes the need for the additional area;

(2)        the site and landscape plans for the Southwest Open Space have been approved by the Chairperson, pursuant to Section 93-78 (Site and Landscape Plans for Public Access Areas in Subdistrict F);

(3)        no portion of a tower located on Site 6 extends beyond 395 feet west of the Eleventh Avenue street line; and

(4)        any portion of a building located beyond 395 feet from the Eleventh Avenue street line shall affect southwesterly view corridors from the Central Open Space towards the Hudson River to the minimum extent necessary to accommodate a public school.