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Hearst Tower

The Hearst Tower is a high-rise office building in New York City designed by Norman Foster. The tower addition sits atop the original 6-story landmark facade and incorporates it into the new design, celebrating the marriage of old and new. The 46-story tower provides a high-quality work environment for Hearst employees.
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0% found this document useful (0 votes)
286 views33 pages

Hearst Tower

The Hearst Tower is a high-rise office building in New York City designed by Norman Foster. The tower addition sits atop the original 6-story landmark facade and incorporates it into the new design, celebrating the marriage of old and new. The 46-story tower provides a high-quality work environment for Hearst employees.
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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HEARST TOWER

ARCH 631 NICHOLS

jingtong liu
xinran liu
nathanielle sybico
jin tu
gaoyang ye

http://cdn.architecturelab.net/
LOCATION
The Hearst Tower is located between 300
West 57th Street and 959 Eighth Avenue,
near Columbus Circle, in Midtown
Manhattan, New York City.

The new addition is made up of 856,000 ft2

Tower is 600 ft tall and incorporates two underground


levels.

The Hearst Tower became the first LEED


Gold Skyscraper in New York City.

fosterandpartners.com
PROJECT TEAM
ARCHITECT Norman Foster

STRUCTURAL ENGINEER WSP Cantor Seinuk

CONSTRUCTION Turner Construction

FABRICATORS Cives Steel Fabrication and Mountain


Enterprises

Foster + Partners is a British international studio for architecture


and integrated design.

ARQUITECTO Norman Foster INGENIERO ESTRUCTURAL


WSP Cantor Seinuk CONSTRUCCIÓN Turner Construction
FABRICATORS Cives Steel Fabrication and Mountain
Enterprises Foster + Partners es un estudio internacional británico
de arquitectura y diseño integrado.

http://www.designboom.com/
BACKGROUND
The original six-story structure was built in 1928
and was meant to be the base of a skyscraper
expansion.

The Great Depression and then World War II


postponed these expansion plans.

In 2001, the Hearst Corporation decided to


consolidate the offices it rents for nearly 2,000
employees in a new 46-story tower.

La estructura original de seis pisos fue construida en


1928 y estaba destinada a ser la base de una
expansión de rascacielos. La Gran Depresión y
luego la Segunda Guerra Mundial pospusieron estos
planes de expansión. En 2001, la Corporación
Hearst decidió consolidar las oficinas que alquila
para casi 2.000 empleados en una nueva torre de 46
pisos.

http://stage.cdn.etg.hearst.com/
Una especificación de diseño
importante fue la preservación de la
DESIGN CONCEPT
fachada emblemática existente y su
incorporación en el diseño de la nueva Preserving New York’s Heritage-- The
torre. La intención original de Hearst
para este edificio era proporcionar un Landmark Facade
entorno de trabajo de alta calidad para
sus empleados El edificio realmente
celebra la unión de lo antiguo y lo An important design specification was the
nuevo preservation of the existing landmark
facade and its incorporation into the new
tower design.

Hearst’s original intention for this building


was to provide a high quality work
environment for his employees

The building truly celebrates the marriage of


the old and new

https://s-media-cache-ak0.pinimg.com
BUILDING LAYOUT
The original building an approximate footprint
of 200 ft by 200 ft

The tower has two distinct zones


1 the zone below 10th floor contains entrance at
street level and lobby, cafeteria 2 auditorium at
the 3rd floor with an approximately 80 ft high
interior open space

The tower is connected to the existing landmark


facade at the 7th level by the horizontal skylight
system spanning approximately 40 ft

El edificio original tiene una huella aproximada de 200 pies por 200 pies
La torre tiene dos zonas distintas: 1 la zona debajo del piso 10 contiene
entrada a nivel de la calle y vestíbulo, cafetería 2 auditorio en el 3er piso
con un espacio abierto interior de aproximadamente 80 pies de altura La
torre está conectada a la fachada emblemática existente en el 7º nivel
mediante el sistema de tragaluz horizontal que abarca aproximadamente
40 pies
fosterandpartners.com
BUILDING LAYOUT
Three sides of the building face streets and views

The west side is against another building; so the


core was shifted toward the western edge

The office zone starts at 110ft above street level


from the 10th floor to the top of the building

Composite steel and concrete floors with 40 ft


interior column free spans were utilized for open
office planning

fosterandpartners.com
Tres lados del edificio dan a calles y vistas: el lado oeste está contra otro edificio; Por lo tanto, el núcleo se
desplazó hacia el borde occidental La zona de oficinas comienza a 110 pies sobre el nivel de la calle desde el piso
10 hasta la parte superior del edificio Se utilizaron pisos compuestos de acero y concreto con tramos libres de
columnas interiores de 40 pies para la planificación de oficinas abiertas
HISTORIC 1926
LANDMARK FACADE
The glass and steel addition sits atop a six-
story cast stone base, which was designed by
Joseph Urban in 1928.

EXISTING BUILDING COST $2 million

Only the facade of the existing building was saved


and one bay of the original steel frame was kept in
order to keep the limestone stable.

TOWER ADDITION COST $500 million

La adición de vidrio y acero se encuentra sobre una base de


piedra fundida de seis pisos, que fue diseñada por Joseph Urban
en 1928. COSTO DEL EDIFICIO EXISTENTE $2 millones
Solo se salvó la fachada del edificio existente y se mantuvo una
crujía de la estructura de acero original para mantener estable la
piedra caliza. LA AMPLIACIÓN DE LA TORRE COSTÓ 500
http://farm1.static.flickr.com/ millones de
dólares
FOUNDATION
SOIL sharp drops in elevation of
bedrock varied up to 30 feet

SPREAD FOOTING used on half the


building on top of rock

CAISSONS used on the other half and


embedded into rock

SUELO Las caídas bruscas en la elevación


del lecho rocoso variaron hasta 30 pies
PIE EXTENDIDO utilizado en la mitad del
edificio sobre la roca
CAJONES utilizados en la otra mitad e
incrustados en la roca

https://esarq7.files.wordpress.com
12 mega columnas de caja cuadradas de 30
toneladas y 44 pulgadas ensambladas a partir
de placas de acero laminado de 4 pulgadas Se FIRST TO TENTH FLOOR
utilizaron "megadiagonales" de 90 pies Se
utilizaron elementos de acero de grado 50 en
todas partes, con elementos de 65 ksi Un
sistema de vigas de 40 toneladas en el décimo
STRUCTURE
piso, integrado con tragaluces, forma un
diafragma que arriostra lateralmente la
estructura y une el edificio antiguo con el 12 30-ton, 44-inch-square box mega columns
nuevo. Un acabado de lino brillante similar al
peltre, un revestimiento de acero inoxidable assembled from 4-inch rolled steel plates
de 5 milímetros envuelve el sistema
estructural exterior, agregando ese mismo
brillo sutil al paisaje urbano y al horizonte. 90-foot “mega-diagonals”

Grade 50 steel members were used


throughout, with 65 ksi elements

A system of 40-ton beams at the tenth floor,


integrated with skylights, forms a diaphragm
that braces the structure laterally and ties the old
building to the new.

a shimmering pewter-like linen finish, 5- millimeter


stainless steel cladding wraps the exterior
structural system, adding that same subtle shimmer to
the streetscape and skyline.

http://ad009cdnb.archdaily.net/
mega-columns
The 30-ton, 44-inch-
square

mega-columnas El cuadrado
de 30 toneladas y 44 pulgadas

Web framing
Beneath the atrium floor
laterally braces the mega-
columns

Debajo del piso del atrio se refuerzan


lateralmente las megacolumnas
The “mega-columns” and
similar “mega-diagonals”
support the tower above a 7-
story-high atrium.

Las "mega-columnas" y "mega-diagonales"


similares sostienen la torre sobre un atrio de 7
pisos de altura.
fosterandpartners.com
Dado que el lado oeste del
edificio está cerca de otro TENTH TO TOP FLOOR
rascacielos, el núcleo de
servicio se colocó en el
lado oeste. Como
resultado, el borde oriental
STRUCTURE
del edificio no pudo ser
reforzado por un núcleo
central. Con el fin de FREE FORM
eliminar la desventaja Since the west side of the building is close to another skyscraper,
estructural de esta forma
the service core was put at the west side. As a result, the eastern
asimétrica, las estructuras
en el perímetro se edge of the building couldn’t be reinforced by a central core. In
diseñaron como un sistema order to eliminate the structural disadvantage of this
de rejilla. El sistema unsymmetrical form, the structures on the perimeter were
estructural diagrid puede
proporcionar suficiente designed as diagrid system. The diagrid structural system can
soporte para que la fachada provide sufficient support for the building facade to resist lateral
del edificio resista las forces.
fuerzas laterales.
EFICIENCIA Otra razón
para usar una rejilla en el
perímetro es que es más EFFICIENCY
eficiente que el sistema de Another reason for using a diagrid on the perimeter is that it is
marco de momento. El more efficient than the moment frame system. The complete
sistema completo de
diagrid ahorró un 20% de diagrid system saved 20% of steel material.
material de acero.
REDUNDANCIA Para
evitar colapsos y REDUNDANCY
soportar eventos de In order to prevent collapsing and to withstand extreme loading
carga extremos, como
explosiones, terremotos events, such as blasts, earthquakes, or unexpectedly large loads.
o cargas
inesperadamente
grandes.

https://s-media-cache-ak0.pinimg.com
Diagrid system diagram
ESTRUCTURA DIAGONAL PERIMETRAL MIEMBRO DIAGONAL
ELIMINAR COLUMNA VERTICAL
PERIMETER DIAGONAL STRUCTURE
DIAGONAL MEMBER ELIMINATE VERTICAL COLUMN

NODE
INTERSECTION NODE FOR DIAGONAL AND RING
NODO
INTERSECCIÓN DE ODA PARA DIAGONAL Y ANILLO
RING BEAM
TO CONNECT DIAGONAL AND EDGE BEAM
VIGA
ANULAR PARA CONECTAR LA VIGA DIAGONAL Y DE BORDE
FLOOR SLAB
CONNECT DIAGONAL TO REACH STABILITY
LA LOSA DEL PISO SE CONECTA EN DIAGONAL PARA ALCANZAR LA
ESTABILIDAD

SERVICE CORE
VERTICAL CORE RESIST GRAVITY LOAD
NÚCLEO DE SERVICIO NÚCLEO VERTICAL RESISTENTE A LA CARGA
DE GRAVEDAD
GROUND
CONCENTRATED LOAD DISTRIBUTION
DISTRIBUCIÓN DE LA CARGA CONCENTRADA EN EL SUELO
In the diagrid-framed system, the gravity and lateral loads
are distributed through the sloped column and spandrel
beam members as axial tension or compression.

En el sistema de marco de cuadrícula, la gravedad y las cargas laterales se


distribuyen a través de la columna inclinada y los miembros de la viga de
antepecho como tensión axial o compresión.
The system allows broad interior spans
of more than 40 feet between columns.

El sistema permite amplios tramos interiores de


más de 40 pies entre columnas
fosterandpartners.com
CONNECTION
STRUCTURE
three basic types of nodes

“bird’s mouths” in order to avoid large


cantilevered floor plates between the
corner nodes

ESTRUCTURA DE CONEXIÓN tres tipos básicos de nudos "boca de pájaro"


para evitar grandes placas de piso en voladizo entre los nudos de las esquinas
CONNECTION
DETAIL
12” wide flange rolled steels sections
(Universal sections)

Heavy duty stainless steel sheets

Concrete topper on composite floor


decking

Glass

Steel decking

Foster, N.,& Giovannini, J.(2010). Hearst Tower:Prestel.


CONNECTION
STRUCTURE
Prefabricated node

The nodes are basically symmetrical as


well as repetitious

An innovative two-point crane pick

Combination of standard and


oversized holes to help with site
erection

Complex nodes bolted into


six different 12-inch, H-column-type
diagrid elements
Nodo prefabricado Los nodos son básicamente simétricos y repetitivos
·Un innovador pico de grúa de dos puntos Combinación de orificios
estándar y de gran tamaño para ayudar con el montaje del sitio Nodos
complejos atornillados en seis elementos diferentes de 12 pulgadas tipo
https://s-media-cache-ak0.pinimg.com columna H
Load path at node

Under vertical load Under horizontal load


LOAD TRACING
GRAVITY
The gravity and vertical load from the building will
distribute toward the apex of the diagonal structure. The
forces will be divided into the other diagonal members
and transfer into the bottom section.

The diagrid creates a highly efficient tube structure by


being composed of a network of triangulated trusses
which interconnect all four faces of the tower. The
diagrid system is inherently highly redundant by
providing a structural network allowing multiple load
paths.
La gravedad y la carga vertical del edificio se distribuirán hacia el vértice
de la estructura diagonal. Las fuerzas se dividirán en los otros miembros
diagonales y se transferirán a la sección inferior. La rejilla crea una
estructura tubular altamente eficiente al estar compuesta por una red de
cerchas trianguladas que interconectan las cuatro caras de la torre. El
sistema de diagrid es inherentemente altamente redundante al proporcionar
una red estructural que permite múltiples rutas de carga

fosterandpartners.com
compression
Considerations would affect the design of diagrid
system and selection of module:

● geometry of the building


● occurrence of eccentric loading
tension ● structural efficiency
● floor-to-floor height
● requirements for fenestration pattern and window sizes
● selection of AESS or concealed steel structure

75 degree or 105 degree slope with 8 storeys each module


is the most efficient selection.

moment shear
LOAD TRACING
LATERAL
In the diagrid system, the columns and diagonals and bracings are all one.”

The 10th floor is a major diaphragm floor—transferring loads from the diagrid system above to the perimeter megacolumn

fosterandpartners.com
A typical seismic-force-resisting system needs to be able to The core consists of a steel frame system
provide sufficient ductility and energy dissipation above level 10.
characteristics. This is required to prevent collapse while
undergoing inelastic frame deformations. The diagrid acts like trusses on the four sides of
facade.

□□j
j

A dual system was designed to resist seismic forces in the


Hearst Tower. The steel perimeter diagrid system is constructed
with a reinforced concrete core and the core is considered to act
as a ductile member.
effect of overturning
moment

effect of shear force


SOURCES

(Hearst Tower (Manhattan)- Wikipedia, the free encyclopedia)

("Flashback: Hearst Tower / Foster and Partners" 03 Feb 2012. ArchDaily. Accessed 29 Nov 2015. <http://www.archdaily.
com/204701/flashback-hearst-tower-foster-and-partners/>)

( Dr. Ahmad Rahimian, P.E., S.E., Yoram Eilon, P.E. 2008, p.2)

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