One World Trade Center is a 1,776 foot skyscraper in Lower Manhattan, New York City. It is the main building of the rebuilt World Trade Center complex. The building has 102 stories and 3 million square feet of office space. It has features like 70 elevators, 3 observation floors, and below ground parking and shopping. The tower uses a steel and concrete structure with a glass and steel facade. It aims for LEED Gold certification with features like natural light, energy reduction, and storm water recycling. The spire serves broadcast functions and is supported by cables from a circular platform ring.

1. STRUCTURE SYSTEM-III
TOPIC: HIGH RISE BUILDING
SUBMITTED TO:
AR.KAJAL ARSHI
SUBMITTED BY:
ANMOL GOEL (1413223)
GAURAV SINGLA (1413232)
 ONE WORLD TRADE CENTRE, NEWYORK

2. ONE WORLD TRADE CENTRE, NEWYORK

3. LOCATION
 At the heart of the tri - state transportation
network
 The World Trade Center development links
seamlessly to the metropolitan area’s, local
and regional transport services.
 It provides quick and easy access to the
region’s three international airports, as well
as a full range of rail services.
 With the completion of World Trade Center
Transportation Hub, the World Trade Center
offers unsurpassed downtown access,
connecting to eleven subway lines,
PATH(rapid transit railroad service) and
Hudson River ferries.
 The One World Trade Center lobby features
street-level entrances on three sides. It also
provides quick and convenient access to the
Transportation Hub and retail concourses.

4.  One World Trade Center (also known as the Freedom Tower,1 World Trade Center, One
WTC and 1 WTC) is the main building of the rebuilt World Trade Center complex in Lower
Manhattan, New York City. It is the tallest building in theWestern Hemisphere, and the sixth-
tallest in the world.
 The supertall structure has the same name as the North Tower of the original World Trade
Center, which was completely destroyed in the terrorist attacks of September 11, 2001.
 The new skyscraper stands on the northwest corner of the 16-acre (6.5 ha) World Trade Center
site, on the site of the original 6 World Trade Center. The building is bounded by West Street to
the west, Vesey Street to the north, Fulton Street to the south, and Washington Street to the
east.
 The building's architect was David Childs, whose firm Skidmore, Owings & Merrill (SOM) also
designed the Burj Khalifa and theWillis Tower. The construction of below-ground utility
relocations, footings, and foundations for the new building began on April 27, 2006.
 One World Trade Center became the tallest structure in New York City on April 30, 2012, when it
surpassed the height of the Empire State Building. The tower's steel structure was topped
out on August 30, 2012. On May 10, 2013, the final component of the skyscraper's spire was
installed, making the building, including its spire, reach a total height of 1,776 feet (541 m). Its
height in feet is a deliberate reference to the year when the United States Declaration of
Independence was signed. The building opened on November 3, 2014.
 The new World Trade Center complex will eventually include five high-rise office buildings built
along Greenwich Street, as well as the National September 11 Memorial & Museum, located just
south of One World Trade Center where the original Twin Towers stood. The construction of the
new building is part of an effort to memorialize and rebuild following the destruction of the
original World Trade Center complex.
INTRODUCTION

5. PROJECT FACTS
Location: New York
Project Completion : 2014
Site Area : 75,000 sq.ft
Project Area : 35,00,000 sq.ft
Number of Stories : 102
Building Height : 1776 ft
Building type: Commercial + office (Mixed use)
Construction Material : Concrete, Steel
 ABOUT:
 The tallest skyscraper in the Western Hemisphere stands at a
symbolic 1,776 feet.
 3 million square feet Class (A) office space.
 There are 70 elevators in the building
 3 observation floors (100,101,102)
 Parking, Broadcast and antenna facilities: Supported by both
above and below ground mechanical infrastructure
 Below ground: - tenant parking & storage,shopping
- access to the PATH, subway trains

6.  Many of Daniel Libeskind's original concepts
from the 2002 competition were discarded from
the tower's final design. One World Trade
Center's final design consisted of simple
symmetries and a more traditional profile,
intended to compare with selected elements of
the contemporary New York skyline. The tower's
central spire draws from previous buildings,
such as the Empire State Building and the
Chrysler Building. It also visually resembles the
original Twin Towers, rather than being an off-
center spire similar to the Statue of Liberty
 The building occupies a 200-foot (61 m) square,
with an area of 40,000 square feet (3,700 m2),
nearly identical to the footprints of the original
Twin Towers. The tower is built upon a 185-foot
(56 m) tall windowless concrete base, designed
to protect it from truck bombs and other ground-
level attacks
 Originally, the base was to be covered in
decorative prismatic glass, but a simpler glass-
and-steel façade was adopted when the prisms
proved unworkable.The current base cladding
consists of angled glass fins protruding from
stainless steel panels, similar to those on 7
World Trade Center. LED lights behind the panels
illuminate the base at night.[
CONSTRUCTION DETAILS

7.  Cable-net glass façades on all four sides of the
building for the higher floors, designed by Schlaich
Bergermann, will be consistent with the other
buildings in the complex. The façades are 60 feet
(18 m) high, and range in width from 30 feet (9.1 m)
on the east and west sides, 50 feet (15 m) on the
north side, and 70 feet (21 m) on the south side.
 The curtain wall was manufactured and assembled
by Benson Industries in Portland, Oregon, using
glass made in Minnesota by Viracon. From the 20th
floor upwards, the square edges of the tower's cubic
base are chamfered back, shaping the building into
eight tall isosceles triangles, or an elongated square
antiprism
 Near its middle, the tower forms a perfect octagon,
and then culminates in a glass parapet, whose shape
is a square oriented 45 degrees from the base. A 408-
foot (124 m) sculpted mast containing the
broadcasting antenna – designed in a collaboration
between Skidmore, Owings and Merrill (SOM),
artist Kenneth Snelson (who invented the tensegrity
structure), lighting designers, and engineers – is
secured by a system of cables, and rises from a
circular support ring, which contains additional
broadcasting and maintenance equipment. At night,
an intense beam of light is projected horizontally
from the spire[8] and shines over 1,000 feet (300 m)
above the tower.[

8. DESIGN
Lobby
 A 65-feet (20 m) high public lobby, topped by a
series of mechanical floors, form a 200-feet
(61 m)-per-side visual cubic base to the tower.
 The next 69 floors, providing tenant office
space, rise above the base to an elevation of
1,150 feet (350 m).
 Mechanical and observation floors culminate in a
rooftop observation deck at 1,362 feet (415 m) with a
glass parapet extending to 1,368 feet (417 m) - the
heights of the original Twin Towers.
 A shrouded antenna structure supported by cables,
rises to a total height of 1,776 feet (541 m), which is a
tribute to the year the United States Declaration of
Independence was signed.Cubic Base

9. DESIGN
 Cable-net glass is used for facades on all four sides
of the building. They measure 60 feet high and range
in width from 30 feet on east and west sides (for
access to the observation deck) to 50 feet on the
north side and 70 feet on the south for primary tenant
access.
 As the tower itself rises from this cubic base, its
square edges are chamfered back, transforming the
square into eight tall isosceles triangles in elevation,
or an elongated square antiprism.
 At its middle, the tower forms a perfect octagon in
plan and then culminates in a glass parapet (elevation
1,362 feet (415 m) and 1,368 feet (417 m) whose plan is
a square, rotated 45 degrees from the base.
 A mast containing the antenna for television
broadcasters is secured by a system of cables, and
rises from a circular support ring, similar to the
Statue of Liberty's torch, to a height of 1,776 feet
(541 m).
 Above the mast will be an intense beam of light that
will be lit at night and will likely be visible over 1,000
feet (300 m) into the air above the tower.

10. VESEY
STREET
FLATON
STREET
GROUND FLOOR

11. FLOOR PLANS

12. SECTION

13. • The tower’s structure is designed around a massive, redundant steel moment frame
consisting of beams and columns connected by a combination of welding and
bolting.
• Paired with a massive concrete core shear wall, the moment frame lends substantial
rigidity and redundancy to the overall building structure while providing column free
interior spans
Column Free interior
Structural Steel Moment frame at the tower
perimeter
STRUCTURAL DESIGN

14.  3.0 million RSF of Class A office space
 55 ft high main lobby accessible from three frontages
and connected to the underground transportation
network
 Double-height sky lobby for access to upper floors
 Column-free floor plates
 45 ft maximum core-to-window depth, 30 ft perimeter
column module, 5 ft curtain wall module
 13 ft, 4 inch slab-to-slab
 Minimum finished ceiling heights of 9 ft
 54 high-speed destination dispatch elevators
 5 service cars serve all office floors
 Central service corridor and limited core penetrations
eliminate the need for an inefficient second interior
path of circulation
 2 tenant-controlled DX units per floor
 10 escalators
BUILDING FEATURES

15. CURTAIN WALL
• Curtain wall begins at 20th floor and continues to
the observation deck.
• Based on a 1.52x 4.0 m2 module, the panels are
floor – to- floor, high- performance, insulated
units weighing in as much as 2720 kgs each.
• The units at the 20th floor are the heaviest due to
blast-resistance requirements which make them
thicker and heavier.
Designed to achieve
LEED CS Gold
– 90% of occupied spaces use natural light
– 21% energy reduction
– 100% renewable energy
– 30% reduction in municipal water consumption
– 100% storm water recycled
– High-quality filtered air
– High-performance curtain wall

16. Structural redundancy
– 14,000 psi steel-reinforced concrete core
enclosing all life safety equipment and paths of
egress
– Extra-wide pressurized and protected egress
stairs
– Emergency generator backup for life safety and
critical systems
– Steel moment frame
– Alternative structural load paths
– Interconnected internal stairs with alternative
paths of egress leading directly to the street
-24/7 electronic access, campus-wide integrated
switch plan
• Safety features will include 3 feet thick
reinforced concrete walls for all stairwells,
elevator shafts, risers, and sprinkler systems;
extremely wide "emergency stairs"; a
dedicated set of stairwells exclusively for the
use of firefighters; and biological and
chemical filters throughout its ventilation
system.
LIFE SAFETY FEATURES

17. SPIRE
• The spire performs multiple functions, most of which
involves broadcasting and digital communication.
• It’s a hybrid structure consisting of 2 major components: a
137 meter spire and a 3 level communications platform
ring.
• At the base of the spire, the circular lattice ring supports
electronic news gathering antennas and communication
antennas.
• To add more support cables are connected from the mast
back to ring.
• Large helical channel, called strakes are built into the
geometry of radome and wrap around the antenna to direct
wind up and away from the structure.

18. THANKS