Beijing National Stadium

The National Stadium (国家体育场), a.k.a. the Bird's Nest (鸟巢), is a stadium at Olympic Green in Chaoyang, Beijing, China. The National Stadium, covering an area of 204,000 square meters with an 80,000 person capacity (91,000 with temporary seating), broke ground in December 2003, officially started construction in March 2004, and was completed in June 2008.

The National Stadium is owned and operated by a partnership company between Beijing Municipal State-owned Assets Management Co Ltd (58%) and CITIC Group (42%).

The stadium was designed for the 2008 Summer Olympics and Paralympics. It was also used during the 2022 Winter Olympics and Paralympics.

Located at the Olympic Green in Beijing, the stadium cost US$428 million. The design was awarded to a submission from the Swiss architecture firm Herzog & de Meuron in April 2003 after a bidding process that included 13 final submissions. The design, which originated from the study of Chinese ceramics, implemented steel beams in order to hide supports for the retractable roof; giving the stadium the appearance of a bird's nest. Leading Chinese artist Ai Weiwei was the artistic consultant on the project. The retractable roof was later removed from the design after inspiring the stadium's most recognizable aspect. Ground was broken on 24 December 2003 and the stadium officially opened on 28 June 2008. A shopping mall and a hotel are planned to be constructed to increase use of the stadium, which has had trouble attracting events, football and otherwise, after the Olympics.

In 2001, before Beijing had been awarded the games, the city held a bidding process to select the best arena design. Multiple requirements including the ability for post-Olympics use, a retractable roof, and incredibly low maintenance costs, were required of each design. The entry list was narrowed to thirteen final designs. Of the final thirteen, Li Xinggang of China Architecture Design and Research Group (CADG), said after he placed the model of the "nest" proposal at the exhibition hall and saw the rival entries he thought to himself, "We will win this." The model was approved as the top design by a professional panel and later exhibited to the public. Once again, it was selected as the top design. The "nest scheme" design became official in April 2003.

Why does a Chinese bowl or a Chinese window have this kind of pattern? Maybe the Chinese people like things to appear in this irregular way, but underneath there are very clear rules. The Bird's Nest developed in this way.

Beijing National Stadium (BNS) was a joint venture among architects Jacques Herzog and Pierre de Meuron of Herzog & de Meuron, project architect Stefan Marbach and CADG, which was led by chief architect Li Xinggang. During their first meeting in 2003, at Basel, the group decided to do something unlike Herzog and de Meuron had traditionally designed. "China wanted to have something new for this very important stadium," Li stated. In an effort to design a stadium that was "porous" while also being "a collective building, a public vessel", the team studied Chinese ceramics. This line of thought brought the team to the "nest scheme". The stadium consists of two independent structures, standing 50 feet apart: a red concrete seating bowl and the outer steel frame around it.

In an attempt to hide steel supports for the retractable roof, required in the bidding process, the team developed the "random-looking additional steel" to blend the supports into the rest of the stadium. Twenty-four trussed columns encase the inner bowl, each one weighing 1,000 tons. Despite the random appearance of the Stadium, each half is nearly symmetrical. After a collapse of a roof at the Charles de Gaulle Airport, Beijing reviewed all major projects. It was decided to eliminate the retractable roof, the original inspiration for the "nest" design, as well as 9,000 seats from the design. The removal of the elements helped to bring the project under the reduced construction budget of $290 million, from an original $500 million. With the removal of the retractable roof, the building was lightened, which helped it stand up to seismic activity; however, the upper section of the roof was altered to protect fans from weather. Enerpac was granted the contract to perform the stage lifting and lowering of the stadium roof as part of the construction process. China National Electric Engineering Co Ltd and China National Mechanical Engineering Corporation lifted and welded the steel structure. Due to the stadium's outward appearance, it was nicknamed "The Bird's Nest". The phrase was first used by Herzog & de Meuron, though the pair still believes "there should be many ways of perceiving a building". The use is a compliment Li explained, "In China, a bird's nest is very expensive, something you eat on special occasions."