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Welcome
to
My
Presentation
on
Petronas twin tower
Kuala Lumpur, Malaysia

Made by
Omar Al Kaish Pasha
UAP
Bangladesh

Introduction:
 The Petronas Towers were designed to be the centerpiece of a larger complex
called the Kuala Lumpur City Centre (KLCC).
 The project site is well located in the heart of the commercial district of the city, the
Golden Triangle.
 According to the Council on Tall Buildings and Urban Habitat (CTBUH)'s official
definition and ranking, they were the tallest buildings in the world from 1998 to
2004.
 It becomes a icon of Malaysia.

Historical background:
 In early 1981 the Malaysian Government decided to move the Selangor
Turf Club and its horse-racing track from the heart of the city to the
periphery and to redevelop the site to meet the demands of urban and
economic growth.
 In the 1990s the project became a principal part of the Wawshan 2020
(2020 Vision),proposed by Dr. Mahathir Mohamad, the former prime
minister of Malaysia, as part of his government plan for Malaysian
progress at that time.
 Design:1991,Topping Out: 1998
Official Opening: August 28, 1999

Architectural character:
 Architecture in Kuala Lumpur is heterogeneous, expressing the city’s diverse
history and cosmopolitan culture.
 Architect: Cesar Pelli

Architectural character:
 The early scheme for the tower design called for a twelve-pointed-star floor plan,
but this was changed to an eight-pointed-star floor plan when the prime minister
observed that the former geometry was more Arabic than Malaysian.
 The client decided to add a concert hall to the project on a third level between the
two towers. The main entrance to the tower complex and the central lobby were
totally redesigned.

Plan of the building:
up to 43th floor above 43th floor

presentation on petronas twin tower

Towers fact:
 Tower One: Petronas Headquarters’ offices.
 Tower Two: Mostly private tenants, KLCC Holdings’ offices, some vacant areas for
rent.
 Height of each tower: 452 meters above street level
 Length of Skybridge: 58.4 meters
 Height of Skybridge : 170 meters.
 The Skybridge is on Level 41.
 Height of each pinnacle: 73.5 meters
 Elevators: 29 double-decker high speed passenger lifts in each tower
 Escalators: 10 in each tower

Materials:
 More than 60 per cent of the materials used in the project were sourced locally.
 The Petronas Towers development marked the first use of high-strength concrete
in Malaysia by local industry, at relatively economic cost.
 Local materials such as Malaysian wood, Terengganu granite, marble and glass
were extensively used.
 The components of the stainless-steel cladding and vision-glass curtain walls were
fabricated locally in Malaysia by a US firm.

Foundation:
 Engineers: Thornton-Tomasetti Engineers
 Contractors: Mayjus and SKJ Joint Ventures
 The Twin Towers were planned to be built on the site of the former Selangor Turf
Club which was flat, green land. But soil studies showed that the site where the
buildings were originally planned for, proved unsuitable for the foundation due to
the irregularities of the limestone bedrock below that's known as Kenny Hill soil.
For that reason they ranging from 60 to 114 meters (197 to 374 ft) deep, were
bored into the ground. The buildings were built on the world's deepest
foundations. The Petronas Towers' structural system is a ”tube in tube design”
, invented by bangladeshi Engineer ”Fazlur Rahman Khan”. Applying a tube-
structure for extreme tall buildings is a common phenomenon .

Foundation:
 Each tower was calculated to weight 300,000 metric tones which would be spread over a large
concrete slab called a mat. 104 concrete piles, ranging from 60 to 114 meters (197 to 374 ft)
deep, were bored into the ground. The concrete raft foundation . Exceeding the weight-bearing
capacity of the soil and enough to cause the foundation to fail.
 Moreover, soil tests showed that the bedrock under both towers started shallow, 15m down, but
sloped sharply to more than 180m.
 To support the immense weight, a depth of 21m would have to be excavated for the basement.
This also meant penetrating the bedrock at one end but not the other.
 The building of the foundation, from the excavation to its completion, took 12 months to finish.
 Once the foundation for Tower One was ready in March 1994, Hazama Corporation was
mobilized. The construction of Tower Two by Samsung began a month later in April once the
foundation was prepared

Superstructure:
 Each tower is supported by a ring of sixteen cylindrical columns of high-
strength reinforced concrete, placed on the inner corners of the star-
shaped plan.
 The columns are nearly 2.4 meters in diameter at the base of the
building, but taper as they rise through the floors.
 At the center of each tower is an approximately 23-by-23-metre concrete
core.
 The cores create two virtually “solid” walls running north-south and east-
west.
 Structural steel was used for typical long span floor beams.
 There is a sky bridge at level 41 because it had to accommodate differing
movements from each tower.
 The 'two-hinged arch' springs from supports at level twenty-nine and rises
at 63° to support a pair of parallel two-span continuous bridge girders at
level forty-one.

Maintenance:
 KLCC Holdings has established a specialized facility management firm, the KLCC
Urusharta.
 The scope of maintenance and facility management tasks is categorized into
several parts: building control system, vertical transportation, power distribution
and energy management, telecommunications, fire alarm system, housekeeping,
safety and security management and tenant services.
 Full cleaning is undertaken every six months to maintain the luster of the stainless
steel.

The Petronas Towers from their bases. Looking up at The Petronas Towers
Conclusion:

Entrance of Suria KLCC
Conclusion:
Inside of petronas tower

Conclusion:
The Petronas Towers At NightView from the northwest from the
Petronas Towers sky bridge

Petronas Towers at sunset Looking up at a cloudy day
Conclusion:

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presentation on petronas twin tower

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