Contractor

Name : Sogecap

Contact : 50 avenue du Général de Gaulle 92800 Puteaux

 https://www.assurances.societegenerale.com/fr/

Construction Manager

Name : Atelier d'Architecture Anthony Bechu - Tom Sheehan

Contact : M. Régis Lassausse - 82 rue Lecourbe 75015 Paris - 01 47 34 97 91

 http://www.anthonybechu.com/fr

Stakeholders

Function : Contractor representative

Sogeprom

Immeuble Ellipse La Défense - 01 46 35 60 00

 http://www.sogeprom.fr/

Function : Contractor representative

Bouygues immobilier

150 route de la Reine Boulogne-Billancourt

 https://www.bouygues-immobilier.com/

Function : Designer

Agence d'Architecture A.Bechu

 http://www.anthonybechu.com/fr


Associate architect

Function : Construction company

Vinci

https://www.vinci-construction.com/fr/nous-contacter/

 https://www.vinci-construction.com/fr/

Function : Thermal consultancy agency

Setec

M. Jean-Pierre Nony - Tour Gamma D – 58 quai de la Rapée 75583 Paris Cedex 12 - 01 40 04 68 66

BET Structure - Fluids

Function : Thermal consultancy agency

DVVD

M. Daniel Vaniche - 12 rue des Frigos 75013 Paris - 01 40 40 96 10

BET Facades

Function : Thermal consultancy agency

Etamine

Mme Marie BOYER - 10 avenue des Canuts 69120 Vaulx-en-Velin - 04 37 45 34 20

BET HQE

Function : Certification company

Energy consumption

• Primary energy need : 118,03 kWhep/m².an
• Primary energy need for standard building : 202,19 kWhep/m².an

Calculation method : RT 2005

Breakdown for energy consumption : Heating (20.71%) Cooling (14.47%) Domestic hot water (6.62%) Fan (42.04%) Lighting (14.81%) Auxiliary (1.34%)

Real final energy consumption

Final Energy : 63,49 kWhef/m².an

Envelope performance

• Envelope U-Value : 1,01 W.m^-2.K^-1
More information :

With its steel exostructure, the complexity of its design and the innovations in the processes used to make it, the D2 tower has achieved 30% material savings.
The structure is broken up into meshes, in the shape of vertical lozenges. The mesh height, originally 4 levels, has been optimized to 6 levels in order to reduce the cost of the structure and limit thermal bridges.

Air tightness (m3 / h):
Incoming flow: 19,605.99
Outgoing throughput: -27 781.84

More information

 The office floors of the tower comply with the 2012 thermal regulations; this will enable them to obtain the BBC RT2005 label by equivalence, thus guaranteeing a 50% gain on the reference consumption determined by the 2005 thermal regulations.

Systems

Heating system :
• Urban network
• Others
• Fan coil
Hot water system :
• Urban network
Cooling system :
• Urban network
• Fan coil
Ventilation system :
• Double flow heat exchanger
Renewable systems :
• No renewable energy systems

Smart Building

BMS :

• Sensors measure the environments (temperatures, humidity) of the premises, as well as the indicators of operation of the technical systems (temperatures, flows, powers, ...)
• A supervision system, under the name of Technical Building Management (BMS), was adopted for Tower D2. This system collects and analyzes all sensor data to optimize system controls.
• The GTB also identifies abnormal states and alerts in case of system failure.
• The measurements of the sensors are recorded in order to analyze the evolution of the behavior of the building over time.

Users’ opinion on the Smart Building functions :

• The GTB is accessible to the maintenance teams, from the PC security station (low lobby level).

• Maintenance teams are trained to use GTB.

Urban environment

• Land plot area : 54 000,00 m²

Because the D2 tower helps to eliminate the existing gap between the Esplanade de la Défense and the city of Courbevoie, this project drains a pedestrian life that could not exist until then and mitigates the enclaved aspect of the famous slab. A living link is created, which has a plant walk participates in the greening of the neighborhood and therefore its best breath.

The silhouette it offers also enhances La Défense skyline, resolutely dense and monotonous. This new organic landscape offers a new horizon to the inhabitants and refreshes its environment.

At the urban level, the impact of well-being is clearly identifiable by all, and is reflected by the many positive reviews that we receive very regularly from people who live with a view of D2 and thank us for falling asleep by watching every night the turn to illuminate. Indeed, outdoor lighting brings another added value. LEDs installed at each intersection of the structure serve as beacons. This device was designed by Benoît Lalloz, light artist. These beacons, white or amber, describe a cycle that follows the calendar of the Moon to animate the facade at night, to its summit where the headdress is also equipped with a particular lighting.

Product

SOLTIS®99



Serge Ferrari

https://www.sergeferrari.com/fr-fr/contact

 https://www.sergeferrari.com/fr-fr


Product category : Second œuvre / Équipements intérieurs

Soltis Master 99 limits glare for optimum working comfort on screens. Thanks to its small size, this screen is ideal for aesthetic and discreet interior blinds.

Very well accepted, optimizes visual comfort for people working on computers:
- homogeneous diffusion of light
- natural light supply preserved without glare
Optimizes thermal comfort:
- its dark side guarantees an excellent external visibility
- its white, highly reflective side protects users from heat

Water management

Water is also saved:
The pressure in the network is reduced, the fittings are infrared detection, and the flush toilets are double flow.

Indoor Air quality

Obtaining good air quality in the building is a central point of HQE certification. The target on air quality is reached at the "Very Performing" level, which reflects the good treatment of this issue. In concrete terms, the systematic demand for the best labels has been made for materials in contact with indoor air:

• For adhesives: Emicode EC1 label

• For paintings: eco-label, for example European

• For carpets: German label "GüT"

• And for wood interior joinery: minimum class A and sustainable forest management certified by the FSC or PEFC label

The air of the premises is constantly renewed in occupancy, with a flow of more than 25 m3 / h / person, regulation flow. The air entering the building is filtered. The airflows are controlled, and the indoor air is healthy and quality!

Comfort

Health & comfort :

A part made of plant:

The technical equipment being integrated into the floors thanks to the use of the urban heating and cooling networks, an outdoor garden composed of many species of trees and shrubs was created on the roof. It is rare to have a plant space in an office tower!

Optimization of glazing:

Control of solar radiation and maximized natural lighting Solar control of glazing was optimized for each radiation exposure, according to a study of shadows due to surrounding buildings. All glazings are equipped in addition to interior blinds. The windows were chosen as transparent as possible, with a high light transmission, so as to ensure a comfortable natural lighting.

Certification requires a relatively low minimum daylight factor (FLJ) for offices, even with a Base level for Target 10 "visual comfort". This is a tricky issue given:

• the depth of open spaces,

• the important masks of neighboring towers,

• the maximum solar factors also imposed by the certification.

Significant natural lighting studies have been conducted. The windows were therefore chosen as transparent as possible, with a high light transmission: 76% for clear glazing (g = 0.55), 68% for solar control glazing (g = 0.37).

The artificial lighting is realized by ceiling lights with T5 fluorescent tubes; the overall luminous efficiency is greater than 80 lumen / Watts, resulting in an installed power of less than 6 / m² (reference RT2005 being 12 W / m²). In addition, to take advantage of natural lighting and reduce electricity consumption, luminaires located on the first day are automatically graded according to natural light, and managed on presence detection.

Post free trays allow all kinds of office layouts. The club floor located on the 34th floor, higher ceiling, will host VIP restaurant, board room, meeting spaces, lounges etc. The Garden of Clouds is linked to the club and includes a putting green of 50 m2, a walk "zen" among the trees and especially an exceptional point of view on the capital.

Some floors are "densifiable" to install a trading room for example. Another floor houses a fitness room. The tower also hosts a conciergerie as in hotels, three levels of restaurant, a cafe and a brasserie on the square. Finally, we wanted to install in the tower a number of amenities for what is pleasant to live and it can accommodate large groups outdoor lighting also provides added value. LEDs are installed at each intersection of the outer structure to serve as a beacon. This device was designed by Benoît Lalloz, light artist. Beacons or white or amber describe a cycle that follows the lunar calendar to animate the facade, at night, to its summit where the headdress is also equipped with special lighting.

GHG emissions

• GHG in use : 13,00 KgCO₂/m²/an
• Building lifetime : 50,00 année(s)

Life Cycle Analysis

Eco-design material :

The bungalows , used during 2 years of building site, justified the respect of the thermal regulation RT2005; they are equipped with presence detection lighting, heating programmer, rebate contacts on joinery, timed faucet, etc.

The rigorous monitoring of the site by Etamine, with a monthly site visit, has resulted in an overall recovery rate of construction waste greater than 90% , material and energy valuations combined. During most of the project, despite the constraints of space, a sorting at source was carried out on site.

Water and energy consumption were monitored weekly.

All materials used have been previously validated by Etamine, in order to ensure their environmental performance according to market criteria. The health characteristics of materials and their environmental impacts are provided for most families.