However rigid and sturdy the pillars—each individual segment measures 12 metres in length and weighs up to 23 tonnes—the structure is still flexible; a deflection of up to 15 cm due to wind or temperature is possible at the top.
In mid-July, the first fifth-level pillar was installed on the north side of the Assembly Hall structure.
Un coup d'œil du futur bâtiment de contrôle d'accès, au mois d'avril 2011. Photo : AIF