World's second-tallest building tops out in Shanghai


News: the topping-out ceremony for the Gensler-designed Shanghai Tower, the world's second-tallest building, takes place in Shanghai tomorrow (Saturday).

The 632 metre-high tower has now reached its full height and is second only to the Burj Khalifa tower in Dubai, which measures 828 metres.

The topping-out ceremony, to be held at the construction site in the Lujiazui development zone in Shanghai, will be attended by Gensler founder Art Gensler and senior figures from the Chinese government.

The twisting form of the tower is the result of wind-tunnel tests and is designed to reduce wind load by 24% during typhoons.

The 121-storey tower will be divided into nine vertical zones, with retail at the bottom and hotels, cultural facilities and observation decks at the top. The zones in between will contain offices.

Shanghai Tower by Gensler

Shanghai Tower is due to open in 2014. It forms the centrepiece of the emerging Lujiazui high-rise district in Pudong, which is located on a bend of the Huangpu river opposite downtown Shanghai.

The building already towers over neighbouring buildings including the 421 metre-high, pagoda-shaped Jin Mao Tower by SOM, and the 492 metre-high Shanghai World Financial Center by Kohn Pedersen Fox.

Last summer, research by the Council for Tall Buildings and Urban Habitats found that nine of the twenty tallest buildings under construction in the world were in China.

Work briefly started earlier this month on what would be the tallest building on earth - the 838 metre-high Sky City in Changsha in central China, which its developers believe they can build in just seven months. However construction was abruptly postponed due to issues with safety certificates and building permits.

Here's some text about Shanghai Tower from Gensler:

Shanghai Tower will anchor the city’s Lujiazui district, which has emerged as one of East Asia’s leading financial centers. Designed by a local team of Gensler architects to embody Shanghai’s rich culture, the 632-meter-high mixed-use building will complete the city’s super-highrise precinct. It is the most forward-looking of the three towers symbolizing Shanghai’s past, present, and future. The new tower takes inspiration from Shanghai’s tradition of parks and neighborhoods. Its curved façade and spiraling form symbolize the dynamic emergence of modern China. By incorporating sustainable best practices, Shanghai Tower is at the forefront of a new generation of super-highrise towers, achieving the highest level of performance and offering unprecedented community access.

Gensler’s vision for Shanghai Tower has taken tangible form after completion of the immense foundation. Soil conditions in Shanghai—a clay-based mixture typical of a river delta—meant supporting the tower on 831 rein- forced concrete bore piles sunk deep into the ground. For three days, a small army of workers assembled to complete the marathon, 60-hour continuous concrete pour. When the job was finished, more than 61,000 cubic meters of concrete had been used to create the six-meter-thick mat foundation.

The tower’s scale and complexity have created so many “firsts” for China’s construction industry that more than 100 expert panels have been established to analyze every aspect of the design. Workers are busy building forms for the concrete core and erecting the gigantic composite supercolumns—measuring 5 x 4 meters at the base and reinforced with steel plates that weigh 145 metric tons each—that will provide structural support for the tower. To carry the load of the trans- parent glass skin, Gensler designed an innovative curtain wall that is suspended from the mechanical floors above and stabilized by a system of hoop rings and struts. And the strategic division of the tower into nine vertical zones will supply the lifeblood of the building’s heating, cooling, water, and power throughout with less energy and at lower cost.

Gensler won the Shanghai Tower project in an invited multi-stage competition among leading international architects. What secured the win were the tower’s design and performance, and Gensler’s commitment to China. To refine the tower’s shape, Gensler’s team used a series of wind tunnel tests to simulate the region’s greatest natural force, the typhoon. Results produced a structure and shape that reduce wind loads by 24 percent—ultimately yielding a savings of $58 million in construction costs. A simple structure, public spaces within the double façade, and sky gardens based on Shanghai’s traditional open courtyards will make Shanghai Tower an unrivaled asset for the Lujiazui district.

  • Funny that the first of the two images in this post is wrong. In the first image, the World Financial Center has the incorrect top. In the original design, the World Financial Center would have had a ball at the top, but Chinese critics complained that it looked too much like the Japanese rising sun so two designs were proposed to resolve the problem. One was the pointy top displayed in the first picture, but the bottle opener design in the second picture is the one that won out.

    • tin

      The first image is a photograph. That’s how it is built. You can’t actually see whether the top has a round cut-out or not, because it is photographed from the side. But I assume that it isn’t round. The second image is a rendering (showing the skyline from a completely different angle) and the Shanghai World Financial Centre is shown as it was build. Nothing wrong here.

    • smack

      Yeah, what you’re seeing as the “pointy top design” is the existing SWFC, on a 90 degree angle to the bottle opener aperture. Also, your history is a little off.

      Some Chinese criticised the original tower because it was to have a circular hole/aperture in the centre, not a “ball”. KPF attempted to make the circle less “pure” by proposing a bridge across the lower half, but in the end they just went for the bottle opener.

      I know this because KPF still had a surprisingly tall model of the circle scheme (with bridge, possibly) in their offices a couple years back.

  • sollbacken

    Wonderful building! It was designed by Peter Weingarten of Gensler’s Seattle office and who was studio head at SOM under David Childs. Great design, Peter! Great, great job!

  • morgs96

    It really lacks the elegance of its two neighbours. If wind loads and cost savings are the only rationale for a buildings form then you’ll inevitably end up with a lump like this. But it’s still a pretty awesome lump, just inelegantly awesome, I think.

    Apparently the issue with the KPF building was that the big circular hole (also a response to wind loads) was deemed too reminiscent of the Japanese flag, particularly as the developers were a Japanese firm, which was why it was changed.

  • Jo'

    It’s not reaching full height. Just the full core height and the last beam. Full architectural height will be reached after the light metal ‘crown’ will get installed on the top. That won’t happen for some weeks. So essentially the article is misinforming the reader.