CASE STUDY 1

NONGAN PERME ZOTHANKIMI ABHISHEK BAJPAIA/1994/07 A/1993/07 A/1909/06

HEASRT TOWER

NYC

Name of the buildingHearst Tower, NYC

Name of architectAR. Norman Foster

ClientWilliam Randolph

Hearst.Hearst Corporation

Introduction… HEARST TOWER

• Hearst Tower in New York City, is located at 300 West 57th Street on Eighth Avenue.

• It is the world headquarters of the Hearst Corporation.

• Foster's tower rises out of former six-story International Magazine Building, commissioned by the founder, William Randolph Hearst.

• The building was completed in 1928 and contained 40,000 sq. ft. area and was designed by Joseph Urban

• The original cast stone facade has been preserved in the new design as a designated Landmark site.

• The new tower addition was completed nearly eighty years later.

• The building received the Gold LEED award in 2006.

FRONT ELEVATION

PLAN OF THE BUILDING

LOBBY PLAN

SITE PLAN

Figures and Facts…. HEARST TOWER

•Gross Area: 79,500 m²

•Zoning Area: 67,000 m²

•Typical Floor to Floor• Height:

-13’-6" (4 m)

•Typical Gross Floor Area: (1,900 m²)

•Total area of building: 49070m2

• Building Height: 597 ft (182 m)• Number of Stories: 46

182 mTower Area Atrium

N

Entrance

•The tower has two distinct zones:•The office zone starts 110 ft above street level(10TH to 44TH floor). •Below the 10TH floor the building houses entrance, lobby, cafeteria and at the 3RD floor and auditorium with approx. 80foot high interior open space.

Office area

Structural System HEARST TOWER

•The uncommon triangular framing pattern (also known as a dia-grid) required 9,500 metric tons (10,480 tons) of structural steel – reportedly about 20% less than a conventional steel frame.

•Each triangle in the dia-grid is four stories tall, or 54 feet/16 m high

•The dia-grid begins at the 10th floor. From 10 down the building rests on raking mega-columns that allow for vast open spaces.

•The building uses a composite steel and concrete floor with 40 foot interior column.

•The diagrids form a network of a triangulated truss system interconnecting all four faces of the tower, thus creating a highly efficient tube structure. And diagrids nodes act as center for redirecting the member forces.

Skylight

Mega Column

intersection of the diagonal and horizontal elements.

DIAGRID NETWORK FORMING A TUBULAR STRUCTURE.

Structural System HEARST TOWER

•The inherent lateral stiffness and strength of dia-gird provided a significant advantage for general stability requirement for tower under gravity, wind and seismic loading.

•This resulted in a highly efficient structural system that consumed 20% less steel material in comparison to conventional movement frame structures.

•The diagonal elements are braced at floor level between the nodal level.

•Thus a secondary lateral system was provided connecting the diaphragm floors( braced frame at the service core area).

NODAL LVL.

SECONDARY LATERAL SYSTEM

From inside

Features HEARST TOWER

Three storey water sculpture in the atrium, help in cooling.Escalators

Skylights through the roof of the base building

Low “E” windows Birds mouth on ext. facadeInterior workspace

Green building HEARST TOWER

•Hearst Tower is the first green building completed in New York City.

•The floor of the atrium is paved with heat conductive limestone.

•Polyethylene tubing is embedded under the floor and filled with circulating water for cooling in the summer and heating in the winter.

•Rain collected on the roof is stored in a tank in the basement for use in the cooling system, to irrigate plants and for the water sculpture in the main lobby.

•The building was constructed using 80% recycled steel.

•The building has been designed to use 25% less energy than the minimum requirements for the city of New York

•Daylight sensors to control lighting and reduce energy use .

•The atrium features escalators which run through a 3-story water sculpture titled Icefall, a wide waterfall built with thousands of glass panels, which cools and humidifies the lobby air.

• The rainwater is harvested in one 14,000-gallon reclamation tank located in the basement of the Hearst Tower. The rainwater will be used to replace water lost to evaporation in the office air-conditioning system. It also will be fed into a special pumping system to irrigate plantings and trees inside and outside of the building. It is expected that the captured rain and will produce about half of the watering needs.