Charles de Gaulle (CDG) Airport in Roissy, north of Paris, underwent major rebuilding and expansion after recovering from the tragic event of May 2004 when part of the roof of Terminal 2E – the latest expansion project at the time which opened in June 2003 – collapsed, killing four and injuring many others. Terminal one was designed by French architect Paul Andreu as a complex circular building with seven satellites that allow as many planes as possible to park around them, but not designed for easy future expansion. The satellites were designed with multiple levels of waiting rooms, baggage handling and retail areas. This terminal was originally designed to handle 7–8 million passengers a year. According to Aéroports de Paris (ADP), it handled 9.3 million passengers in 2003, which corresponds to around 20% of Charles de Gaulle's overall traffic. Since April 2004, terminal one has undergone a 220 m renovation project that was divided into four main steps, each dedicated to a quarter of the building. Terminal two was designed and constructed on a linear basis. The terminal consists of a central corridor that harbours all its terminal sections. This structure was designed with an eye to the future as it allows ample opportunity for expansion. The second and more modern architectural phase of terminal two encompasses sections 2F and 2E, where the blunt concrete structures of the older parts have disappeared from the outside view to give way to rounded metallic and glass vaults. These satellites can accommodate three wide-body jets through six jetways.
Terminal 2E with an area of 104,000 m², constructed from reinforced concrete and 36,000 m² of glass, opened in June 2003 with much fanfare. It was expected that the 750 m complex would transform Paris into the most powerful hub in Europe, ahead of Frankfurt and London. With ten plane parking gates, the terminal's twinned 650 m-long main structures could handle ten million passengers a year with ease and efficiency. However a little over 11 months after it opened, a section of the roof near gate E50 collapsed with tragic consequences. Bureau Veritas of Paris investigated this tragedy, and in an official report in February 2005, concluded that the terminal roof had been weakened by temperature changes that caused the building's outer shell to shift by 1–2 cm daily, wearing down the concrete roof. A report released in May 2005, stated that the building was not designed to support the stress it was put under, and the concrete used in its shell weakened gradually to a point that the pillars pierced through it. There were flaws in the construction, which should have been detected earlier.
The collapse was due to a number of failings acting in unison and the design had very little margin for safety. The final report on the incident stated that the vaulted concrete roof was too fragile and had been penetrated by the metal trusses causing weaknesses in the structure. Based on internal and external studies in March 2005, ADP chose to demolish the jetty and reconstruct the roof at a cost of 100 m. (Million euros?)
The reconstruction project for 2E replaced the ‘concrete tube’ style of the jetty with a steel and glass structure. During the reconstruction project,, 2 temporary departure lounges were constructed adjacent to the terminal allow for the same capacity as before the collapse. The terminal was reopened completely on 30 March 2008. The new terminal has three buildings arranged in a fan shape: the first has the check-in facilities, the second the boarding lounge and shops (300 m2 duty free shopping and 120 m2 boutique areas) and the third building contains the baggage claim area. The layout of the building has been specially designed to facilitate departures and arrivals and provide speedy connecting channels for customers in transit, which meant an extensive use of self-service check-in and transfer kiosks.
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