Its a brief analysis of one world trade center from architectural perspective. It also provides the idea of design concept used to build this building.
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.
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 &
world financial centre
6. 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
7. 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.
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.