High-rise buildings

Ho Chi Minh City is the fastest economic growing urban area in Vietnam. Landmark 81 will be a particularly impressive addition to the city’s skyline once complete in early 2019 overtaking Keangnam Hanoi Landmark Tower as the country’s tallest. This 81-storey residential structure will offer luxurious living combining extraordinary views with maximum floor space thanks to 3600 tonnes of HISTAR® 460 sections produced by ArcelorMittal Europe. The tower will be a notable achievement for ArcelorMittal too. For the first time, we will be the sole steel supplier of all the sections in a high-rise.

A new addition to the city’s skyline

Measuring 462 metres, Landmark 81 will be one of the tallest residential buildings on earth. Commissioned by property developer Vingroup, designed by architectural firm Atkins, structural design consulted by Arup, and built by construction companies Mace and Coteccons, it will make a statement in one of Ho Chi Minh City’s most prime locations facing the Saigon River. This 81-storey skyscraper will comprise a hotel, serviced apartments, and a high-end shopping centre.

Perfect for heavy loads and free fire protection

The 3600 tonnes of sections were produced by ArcelorMittal Europe – Long Products’ Differdange mill. The composite design of concrete and HISTAR® steels is ideal to carry heavy loads. The concrete walls contain multiple jumbo sections acting as vertical columns to carry the weight of the building. The concrete surrounding the steel columns also acts as free fire protection.

More floor area thanks to HISTAR®

A key advantage of HISTAR® steels will be an increase in saleable floor area. Vietnam is one of the few countries in the world where developers have to sell the net area of apartments or offices instead of the gross area. Inserting HISTAR® sections into the walls will enable builders to reduce their width freeing up additional saleable area at prime cost. By selecting HISTAR® 460 columns in composite walls, the structural engineer, Arup, succeeded in maximising the so-called “carpet area” for the benefit of the investor, Vingroup, as well as the future tenants.

In total, three lots of HISTAR® sections will be delivered to the steel fabricator QH Plus.  The first lot arrived in Ho Chi Minh City in early September 2016. Completion for Landmark 81 is expected in early 2019.

Text:
ArcelorMittal Europe

Photos:
© Vingroup
© hieunghi/Shutterstock.com

An eye-catching new addition to the Chicago skyline will feature 2,530 tonnes of ArcelorMittal’s ASTM A913 grade 65 and 70 column sections.

The “150 N Riverside” – an unusual 54-storey office building that appears to stand on one “foot” – will feature steel columns made by ArcelorMittal Europe—Long Products’ Differdange mill in Luxembourg, the only producer of steel sections with these specifications.

Commissioned by Riverside Investment & Development and designed by architectural firm Goettsch Partners, with Magnusson Klemencic Associates as structural engineers, the skyscraper features 111,000 m² of rentable space and is located in one of the most prominent sites in the city – the south branch of the Chicago River.

Magnusson Klemencic Associates’ Robert A. Chmielowski said: “After discussing numerous options with our client and Clark Construction, ArcelorMittal’s products were determined to offer the most cost-effective approach for the structural system designed by Magnusson Klemencic Associates for this unique building.

“The larger sections and high-strength material provided the only ‘off-the-shelf’ sections that could resist the large forces”.

An unusual design

The building’s signature component is its unique design. With its vertical exterior columns seemingly terminating at level 8, the building has a significantly smaller base when compared to the typical floors above.
 
This special layout was required to accommodate the complexities of the building site. The project is located just metres away from the Chicago River at its east – and a rail yard that has been active for more than a century to the west.

The constraint of the railway, which made it impossible for the building’s exterior columns to extend to solid ground, pushed the design team to develop what is known as a core-supported framing plan.

The building was essentially designed as a typical office building from level 8 through to level 54 with an efficient, yet complex, transfer truss system that enables the weight of the building to be supported on its concrete core below level 8.

The core is then supported on a 3m deep concrete mat that transfers the load to a collection of 16 rock-socketed caissons below, each one having a 3m diameter.

The structural engineer – in cooperation with Zalk Josephs, the project’s fabricator – determined that incorporating 70 ksi steel sections into the design would lead to considerable savings in fabrication hours and cost.

The construction of the highest skyscraper in Pakistan’s largest city Karachi was started in 2010 and it is scheduled to be finished in 2014:  with 260 m height and 62 floors it will be a new icon in Karachi’s skyline. ArcelorMittal provides sections, decking – and their expertise in steel construction!

Around 2000 tn of W sections and 72 000 sqm of decking will be supplied by ArcelorMittal for this iconic skyscraper in Pakistan’s largest city.

A successful project that counted with the collaboration of our experts from different business divisions in order to achieve the best results: ArcelorMittal Distributions Solutions International, ArcelorMittal Long Carbon Europe, ArcelorMittal Construction France and the ArcelorMittal Distribution Solutions Design and Engineering office.

The Bahria Icon Tower is revolutionary in various aspects: in its scale, design and technology. A combination of visionary aesthetics and highest functionality, this mixed use high-rise building will symbolize modern life and engineering excellence.

Designed as an intelligent building, micro wind turbines and solar panels will generate at least a part of the energy the building will consume. Its façade will consist of titanium finish panels and glass and represent the region’s most technologically advanced structure.

The Chinese company Broad Sustainable Buildings BSB is revolutionising the construction of high-rise buildings by using a modular construction technique with steel. For the construction of the 57-storey Mini Sky City in a record-breaking 19 days, ArcelorMittal supplied 10,345 tonnes of rolled HISTAR® steel sections.

Broad Sustainable Building (BSB) has been in the headlines around the world for constructing  a tower in the Chinese city of Changsha in less than 3 weeks, at the equivalent rate of three storeys per day. For its structure, 10,345 tonnes of HISTAR® sections were used, produced at ArcelorMittal Europe’s long products plant in Differdange, Luxembourg.

ArcelorMittal was involved in the project providing the best-suited steels for the structure and counselling Broad Sustainable Building to use rolled sections instead of built-up sections in order to speed up the fabrication of the individual columns, the so called “steel trees”. The use of innovative, high resistance HISTAR® steels contributed to the speedy fabrication of the vast amount of steel "trees" required to construct the building’s core.

The skyscraper is built with 90-percent, factory-produced, LEGO-like blocks, using a modular construction technique which won BSB a CTBUH Innovation Award in 2013.

This modular technique not only contributes to the speed of construction and its cost-efficiency, the structures have also proved structurally safe in earthquake testing and are highly energy efficient. According to BSB, the quadruple-paned glass façade together with 20 cm wall insulation and exterior sun shading make the buildings up to 5 times more energy efficient than conventional buildings of this type.

On 80,000 m2 the high rise building Mini Sky City will provide 800 apartments and office space for 4,000 people.

Broad Sustainable Building realized their first public prototype in 2010, a six-storey building erected in a single day for the Shanghai Expo. More than 30 buildings have been completed since then, among them a 15-storey hotel in six days and a 30-storey hotel in 15 days.

HISTAR® steels

HISTAR® steels are quenched and self-tempered (QST) steels with market-leading weldability and ductility. Supplied in several different grades, these ArcelorMittal steels have been used in skyscrapers worldwide, including the Freedom Tower in New York and the World Financial Center in Shanghai.

“Time is money and the modular construction is going to change the way small and tall buildings are constructed all over the world”, said Jacques Braun, a general manager at ArcelorMittal. “The combination of recyclable high-strength steel and rolled sections in HISTAR® is ideal for achieving the fastest, safest and most economical structures”.

Website Broad Sustainable Buildings BSB

Watch the video of the construction of Mini Sky City on YouTube