R Egis and towers, one million square meters

R Egis and towers, one million square meters

1 million squares meters 180 000 G The guardians of the Urals, Ekaterinbourg, Russia 110 000 G Tiara Towers, Dubai, United Arab Emirates ADPI 92 450 G Triangle, Paris, France Herzog & De Meuron 90 000 G Generali, Paris, France 90 000 G Pont de Sèvres Towers, Boulogne Billancourt, France Dominique Perrault 87 000 G First, Paris, France KPF - SRA Architectes 86 000 G T1, Paris, France 79 000 G Air², Paris, France 69 500 G Majunga, Paris, France Jean-Paul Viguier 54 000 G D², Paris, France Anthony Béchu - Tom Sheehan 45 000 G Sequana (Mozart Tower), Issy-les-Moulineaux, France 37 000 G AXA Opus 12, Paris, France 35 000 G Iset, Ekaterinbourg, Russie 29 460 G BIDV, Danang, Vietnam AREP 27 000 G Oxygène, Lyon, France ARTE Charpentier Air 2 - Paris, France

KPF - SRA Architectes Florence Levillain / Paul Maurer Meeting the Challenge of complexity < First Tower Winner of the French prize for engineering design and the of the MIPIM Awards. The aspiration of a tower project is to reconcile the sublime with reality. The sublime because a tower is an architectural work of art, a The exemplary reconstruction of this tower, built in the 70s, has: ZZincreased its leasable floor area by raising the tower 60m and by creating 10 new levels, symbol of modernity and a landmark in the urban landscape. Reality because a high-rise is a dense, complex building, a vertical city that demands an extremely rational design to ZZcut its energy consumption figure, not by half but by threequarters, optimize each and every square meter. The architectural and engineering components ZZimproved the sense of wellbeing of its occupants by creating openings in blind gable walls, reorganizing the core and increasing the floor area on each level, of a tower project (the cores, the vertical traffic ways, the facades, the distribution of utilities/ energy supplies, etc.) are so closely intertwined that the architect s design and the engineer s ZZimproved access to the tower and its insertion into the very dense urban fabric at Paris-La Défense. calculations cannot be dissociated. As demonstrated by the Tour First, winner of the French Grand Prix for engineering design, the Egis teams of engineers work on these demanding building programs, analyzing and ranking their various components to closely coordinate their interrelationships. Sequana - Issy-les-Moulineaux, France First - Paris, France Flows and density Core optimization Facade design The density of human flows and the multiplicity of functions, i.e., the challenges underlying the success of a tower operation, are accompanied by design constraints that extend beyond the building itself. Whether from the standpoint of human, energy or logistic flows, how the tower is inserted into the city is of prime importance. The Egis Group possesses the entire spectrum of capabilities needed to account for all these considerations: mobility, transport, energy, water, etc. The essential structural element for tower solidity, the core is the nerve center of the building and the location of multiple functions: vertical link for the occupants, for utilities, for evacuating persons, operation and maintenance zone, etc. Since the core takes up considerable space on each level, its optimization represents a major challenge in tower design. In our time, facades have become far more than simply the architectural skin of the edifice. If facades give the tower a personality of its own via the choice of materials, textures and colors, they also determine the quality of indoor lighting, thermal comfort and the building s energy performance. The search for excellence is the motor that drives the Egis engineers specialized in designing the increasingly complex envelopes for highrise structures. Generali - Paris, France Performance of the structure The great height of towers multiplies many times over calculations that are customarily secondary, even negl igible when des igning a bui lding of conventional height. Wind can have an impact as considerable as an earthquake; the compression of the concrete becomes critical, and the oscillations at the top of the structure must be diminished to avoid discomfort for occupants.

ARTE Charpentier Gilles Aymard L Autre Image / Jean-Paul Viguier et Associés, Anthony BECHU - Tom SHEEHAN D2 - Paris, France T1 - Paris, France Majunga - Paris, France The guardians of the Urals - Ekaterinbourg, Russia Safety Environmental challenges Worksite organization Because the time needed to evacuate the concentration of persons from a tower building in the event of an incident is significant, safety considerations are a priority component of the design process. Risk assessment and the regulations that are drafted in consequence vary from one country to another. For each tower project, Egis first investigates the specific context in the country of its location and determines the framework in terms of safety for the future building. Green building must be realistic and economically viable. The tower s great height offers advantages in this regard that are still not often acted upon: wind (wind turbine energy); light (solar power and the comfort of occupants); slenderness and spatial volumes (natural ventilation); density (pooling and optimization of energy sources), etc. The management of a tower construction site requires preparing a very detailed schedule for building on several levels simultaneously while avoiding any dangerous superimposition of works. The flows of workers and materials must also be minutely organized and controlled while adapting the worksite to the space available at the base of the building, which is often very limited. Triangle - Paris, France Iset - Ekaterinbourg, Russie Oxygène - Lyon, France

Our Worldwide presence 40 % France (incl. DROMs and COMs) 19 % Europe 8 % Asia 7 % Americas 12 % Africa 13 % Middle-East 1 % Australia - Oceania Egis is a consulting and engineering group working in the fields of transport, urban development, construction, industry, water, environment and energy. In the road and airport fields, the group is also involved in project financing, turnkey-contract projects and facility operation. With 13,000 employees, of whom 8,300 in engineering, the group had a turnover of 937 million in 2015. Egis is a 75% owned subsidiary of the French Caisse des Dépôts and a 25% of owned subsidiary Iosis Partenaires ( partner executive and employee shareholding) 15, avenue du Centre - CS 20538 Guyancourt 78286 Saint-Quentin-en-Yvelines Cedes - France Tél. +33 1 39 41 40 00 egis.batiments-international@egis.fr www.egis.fr MARS 2013 EGIS SA RCS Versailles 702027376 Egis, DR, couverture: Generali, Paris SIE_E016 - Plaquette Egis et les tours - Septembre 2016