John Hancock Centre

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					LOCATION OF CHICAGO




                      CHICAGO
LOCATION OF JOHN HANCOCK CENTRE




                               130 E WACKER
       NORTH MICHIGAN AVENUE   DR
      TEMPERATURE OF CHICAGO
•   Mid-summer day, humidity is usually moderately high and
    temperatures ordinarily reach anywhere between 78°F
    and 92°F (26°C to 33°C).
•   Overnight temperatures in summer usually drop to
    around 65°F (18°C), but can sometimes remain well
    above 70°F (21°C).
•   Yearly precipitation comes about 36 inches (920 mm).
•    Summer in Chicago is prone to thunderstorms.
•   In a normal summer, temperatures exceed 90°F (32°C)
    on 24 days.
           PROJECT BRIEF
•   Project        :- John Hancock Center
•   Architect      :- Skidmore, Owings & Merrill.
•
•   City           :- Chicago
•   Country       :- USA
•   Building Type :- Tower
•   Number of Dwellings :- 700
•   Date Built         :- 1968-70
•   Floor             :- 100
•   Floor area        :- (260,126 m²)
PROJECT BRIEF
Height
•   Antenna/Spire :- 1,500 ft (457 m)
•   Roof1        :- 127 ft (344 m)
• top floor      :- 1,078 ft (329 m)
• Elevator count :- 42

Companies
• Contractor      :- Tishman
  construction co.
• Developer       :- john
  Hancock insurance
BUILDING USE

   mixed use
   communication
   observation
   office
   Residential
   JOHN HANCOCK CENTRE
                 •Located at 875 North Michigan Avenue in the Gold
                 Coast area of Chicago, Illinois.
                 • Skyscraper designed by structural engineer fazlur
                 Khan of Skidmore, Owings and Merrill.
                 • It was the tallest building in the world outside
                 New York City completed in 1969
                 •Currently the fourth-tallest building in Chicago and
                 the sixth-tallest in the United States.
                 •When measured to the top of its antenna masts, it
                 stands at 1,506 feet (459 m).
                  •.
• The building is home to offices and restaurants, as well as about
700 condominiums and contains the highest residences in the world.
• This skyscraper was named for John Hancock Mutual Life Insurance
 Company, a developer and original tenant of the building.
The elliptical-shaped
  outdoor plaza
      FACADE
•   The facade consists of 5 sections, each approximately 18
    storey high.
•   Facade defined by the diagonal bracing tubes.
•   In the top section, only half of the pattern is visible.
•   The external cladding is made of anodized aluminum with
    tinted bronze glass and bronze colored aluminum window
    frames.




                                 Five sections defined by
                                 diagonal braces
FACADE




                  Facade detail




  Close up of
  aluminum skin
The slope of the windows helps to reduce the
feeling of vertigo for people looking out of high
floors.
SITE PLAN
      PLANS




STREET LEVEL PLAN   TRANSIT FLOOR PLAN
   APARTMENT
It includes 48 stories of apartments
(witH a total of 711 apartments).




LIVING ROOM                       PLAN OF APARTMENT
                      K
                      I
                      T
                      C
                      H
                      E
                      N




BATHROOM   BED ROOM
    APARTMENT




TYPICAL APARTMENT   LIVING ROOM
FLOOR PLAN
                  CIRCULATION
•   The tower’s centrally located core contains fifty lifts and five
    escalators.
•   Transport up to 12,000 people a day.
•   Express lifts directly link the entrance level with the transfer
    floors, the observation deck, and the restaurant at the very top
    of the floor.




                                                   Escalator from the
                                                   office lobby
    SUITES



                 View of embassy
                 suite




View of Hilton
suite
INTERIOR OF JOHN HANCOCK CENTRE
   •    JOHN HANCOCK Center's interior incorporates rich
       travertine
        and marble surfaces with textured limestone.
   •    The elliptical-shaped outdoor plaza has become a
       favorite meeting spot for North Michigan Avenue
       office workers, shoppers and
        tourists.
   •    This community oasis is enlivened with plantings, a
       12-foot waterfall and seasonal outdoor dining.




                                           Marble surface with
                                           texture limestone
•   The 95th floor has long been home to a restaurant.
•   While patrons dine, they can look out at Chicago and
    Lake Michigan.
•   The Hancock Center's observation deck facilities
    (called the Hancock Observatory) compete with the
    Willis Tower's Sky deck
     across town.
•   The Hancock Center is in a commercial district, while
    the Willis
     Tower is in the financial district.
•   The Hancock Center 94th floor observation deck
    displays
     exhibits about the city of Chicago.
•   The 44th-floor sky lobby features America's highest
    indoor     swimming pool.
•   The first forty-one floors are office, parking, and
    commercial; the remaining upper floors are
    condominiums, an observatory, a restaurant & bar, and
    broadcast facilities.
•    The skyscraper ... rises from 40,000 square feet at the
    base to 18,000 square feet at the summit.
 INTERIOR OF JOHN HANCOCK CENTRE




                           Planters used in
                           interiors




Marble surface
texture limestone
OBSERVATION DECK
•   The Hancock Center's observation facilities compete
    with the Sears Tower's Sky deck across town.
•   The Hancock Center 94th floor observation deck
    displays exhibits about the city of Chicago.
•   Maps explain the view in each direction and a
    special meshed-in area allows the visitors to feel
    the winds 314 m (1,030 ft) above ground level.




                                         Observation deck
View of Chicago from
observation deck
SWIMMING POOL


•   America's highest indoor swimming pool is located
    on the 44th floor near the sky lobby.
•   The pool itself is carved out of the mechanical floor
    below.




                                         Swimming pool
                                         on the 44th floor.
  PARKING

  •   The parking garage is accessed through a detached
      spiral ramp at the southeast corner; the double helix
      makes 3 loops each way between ground level and
      the garage.




                                     Detached spiral
Bridge from the ramp to
                                     ramp
the garage
        RESTAURANT
    •   Located atop the John Hancock Center, The Signature
        Room at the 95th® offers diners exquisite food, superb
        service and a dazzling skyline view.
    •   The elegant wood designs and art deco interior create
        an inviting and intimate atmosphere, while the floor-to-
        ceiling windows exhibit the stunning Chicago skyline
        and 360 degree views of the entire city.




Signature room of the 95th         Signature lounge on 96th
floor                              floor
RESTAURANT
RESTAURANT




      Area For private
      parties
       SKY LOBBY
   •   The first sky lobby was also designed by Khan for the
       John Hancock Center.
   •    The 44th-floor sky lobby of the John Hancock Center
       also features the first high-rise indoor swimming pool,
       which remains the highest in America.
   •   This was the first time that people could have the
       opportunity to work and live 'in the sky'




Barry Flanagan sculpture in          Delaware place office lobby
the south lobby
LOBBY VIEWS
    CONCEPT BEHIND FORM
•   The tapered form resulted from structural
    concepts to reduce cost and decrease the "sail effect"
    of wind loads.
•   The tapered form is also accredited to the zoning of
    building functions with offices, which require more
    open floor area on the lower levels, then a zone of
    efficiency apartments that require a deeper plan than
    the multi-bedroom dwellings at the top that have more
    rooms requiring exterior frontage.
•   The unique diagonal bracing, an idea used earlier by
    SOM in the Alcoa Building in San Francisco of the same
    year, is the result of a structural concept to achieve
    maximum wind bracing with minimum steel.
•   The idea is a rectangular "trussed tube" made up of
    vertical trusses where lateral loads are taken up by the
    diagonal members as compared to a conventional steel
    frame of vertical vierendeel trusses where lateral
    loading is taken up in the connections between
    column and beam.
•   The choice of this system resulted in a significant savings in steel
     from a typical steel building requiring 45-50 pounds of
    steel per square foot to about 30 pounds per square foot here.
                                                        Tapered form
   CONCEPT BEHIND FORM




            Tapered form

Because of space constraints caused by the tower's
tapering walls, common hallways and elevator
lobbies are narrower on higher floors.
MULTIFUNCTIONAL
•   Just like Marina City, the John Hancock Center is a
    multifunction
     building.
•   It includes 48 stories of apartments (with a total of 711
    apartments), 29 stories offices, shops, a hotel, a swimming
    pool, an ice rink, restaurant and on top of the 344 meters
    (1127 ft) tall building radio and television facilities.
•   On top it offers services like its own post office and a
    refuse
    collection.
•   Apartments are located on the top.
•   Some of them are so high that the inhabitants sometimes
    have to call the doorkeeper to ask what the weather's like
    down on the ground, as the apartments are sometimes
    above the clouds.



                                              Height
                                              comparison
        CRITICISM
•     At the beginning of the project, it was controversial
    mostly because of the location of this massive tower, near
    the much
     smaller and more gentle buildings on Michigan Avenue.
•    After its completion, most of the criticism dwindled, but
    much like with the Sears Tower, the plaza at the entrance
    was considered very user- unfriendly, being afflicted by
    heavy gales
     and loud traffic noise from Michigan Avenue.
•    It was redesigned in 1995 and now includes a 3,5 meters
    high fountain to muffle the noise and a recirculation of
    office and shopping traffic.




                                               Fountain view
STRUCTURE
•   X-braces used in the façade.
•   The construction was designed by the engineer Fazlur Kahn
    and architect Bruce Graham from Skidmore, Owings &
    Merrill. Fazlur Kahn devised the frame-tube system, which
    he also implemented in the sears tower.
•   This new construction method was made possible by new
    technologies, like more advanced software and new
    developments in steel.



                                            Diagonal
                                            shaped braces
•   New construction method, made possible for Kahn to design
    constructions which could resist the strong windforces more effectively
    by having the forces absorbed by all three dimensions of the building.
•   The diagonals are connected to the exterior columns, making if
    possible for the forces to be carried over from the braces to the
    columns and back.
•   The innovative construction also resulted in a 50% decrease of
    required steel compared to skyscrapers built with interior
    columns.
•   The huge X-braces serving both a structural and a visual purpose.
•    Visually, it gives the impression of stability and it moves the eye away
    from the human-sized windows.




                                                                Night view
•   The external crossbracing also conveniently
    freed up the interior space from columns,
    allowing for flexible office arrangements.
•   The John Hancock weighs in at a mere
    29.7 lb/sq. foot (although it uses a total of
    46,000 tons of steel). This allowed it to be
    constructed for the cost of a conventional
    45-story.
•   One of the most famous buildings of the
    structural expressionist style, the skyscraper's
    distinctive X-bracing exterior is actually a
    hint that the structure's skin is indeed part of its
    'tubular system'.
•   This X-bracing allows for both higher
     performance from tall structures and the ability
     to open up the inside floorplan (and usable floor
     space) if the architect desires.
    FEATURES AND AMENITIES

•   Doorman is available
•   Exercise facility is available
•   Hospitality room is available
•   Laundry room is available
•   Observation floor is available
•   One of the city's famous buildings
•   Plaza is available to the public
•   Public parking is available
•   Sky lobby is present
•   Swimming pool is available
•   Transmission antenna on roof
          ACHIEVEMENTS
•   Recognized around the world for its distinctive architecture,
    prestigious location and presence on Chicago's skyline.
•   JOHN HANCOCK CENTER has won numerous awards for its
    innovative and iconic style, including the Distinguished
    Architects 25-Year Award from the American Institute of
    Architects.
•   John Hancock Center is a member of the World Federation of
    Great Towers.
ARIAL VIEW OF JOHN HANCOCK CENTRE




           Tapered form

				
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