Archives

January 2008 edition

Evaluation of products

Foundation systems: a new family of processes

Recent droughts and problems introduced by them have led building professionals to imagine new foundation processes for underpinning constructions damaged by unstable soils. The objectives are to repair private homes and small buildings in the most appropriate manner.

Technical assessments and certifications of construction products and processes

European Technical Approval, Technical Assessment, tests, certifications, CE marking, Technical Application Document … Assessments of construction products and systems may be imposed by the regulations or voluntary, but they always have the same objective which is to verify and certify their quality. You will find in this new brochure, published by CSTB, an overview of the assessment scope.

Architecture

The breathing glazing technique is exported to Luxembourg

Façade systems using breathing glazing benefit from several ATEx (Appréciation Technique d’Expérimentation - Technical Experimental Assessment) and Technical Assessments and are widely used particularly for the office tower buildings in the La Défense district near Paris. This French technique had not yet been exported, but this has now changed: the fourth extension of the European Court of Justice in Luxemburg, designed by Dominique Perrault, will be provided with a façade made of breathing glazing.

Glass cladding with ATEx for Strasbourg Station

Unlike previous high speed train lines, the TGV East line forms part of a global development project for which all work was initiated simultaneously from one end of the route to the other. The most emblematic constructions designed by the AREP design and engineering office, an SNCF subsidiary, include the renovation of the large arch made of glass blocks in Paris Gare de l’Est, and construction of the large glass roof adjacent to the main façade of Strasbourg station. The immense transparent ovoid more than 120 m long has become a genuine innovation project for SEELE, the contractor, with the manufacturing and installation of cold-formed laminated glazing.

Light(s) at Wuhan station

Wuhan is the 12th largest city in China with more than 8 million inhabitants, and is currently building a station worthy of the spectacular development of the country and the Province of Hubei of which it is the capital. Above the railways, the entrance and central space promise to extend under an immense roof covered with a reflecting aluminum sun-shade made by an Italian manufacturer. AREP, SNCF’s design and engineering office subsidiary responsible for the project, called in CSTB lighting experts to provide a precise solution to a Chinese owner who enjoys artificial light and night magic.

Six ATExs for the new Paris-Charles-de-Gaulle satellite

The new terminal 2 boarding satellite designed by Aéroports de Paris was commissioned in June 2007, continuing the development of Europe’s leading hub. S3 is designed to accommodate large carriers such as the A380, and deploys a genuine range of know-how over its 750-meter length. Its objective is to handle 8.5 million passengers per year in well-illuminated spaces with clearly understandable functions. CSTB has issued not less than Six Technical Experimental Assessments to many companies responsible for making the glass walls of the structure.

Patrick Bouchain: for a cultural, scientific and joint approach towards architecture

For one of their “Cartes blanches", Archinov and CSTB invited Patrick Bouchain, the architect of the Zingaro theatre in Aubervilliers and the "Lieu Unique" in Nantes. He is an atypical qualified architect, positioning himself between the client and the project manager. He limits himself to few means and he makes the best use of the regulations, to create projects satisfying real demands from the architectural community. He acts as a responsible citizen capable of questioning the program, and federates a very wide variety of skills in the context of "democratic" sites, in other words constantly open to the public, rather than working on technical and aesthetic projects difficult to achieve.

Products and materials

The thermal performance of Thin Reflective Products is expressed exclusively in terms of thermal resistance R

Most insulation manufacturers develop excellent products and justify the performances of Thin Reflective Products in accordance with the requirements of protocols recognized by the international scientific community and construction professionals. However, others might announce performances higher than should be assigned to their product without any conclusive justification.Thus, users might face serious disappointments. Not only are the expected savings not achieved, but the work done can contravene new regulatory requirements for new buildings and existing buildings.

Risks

RIVES: natural risks know no frontiers

The RIVES project offers common management of natural risks between France and Italy. CSTB and the French Town Planning Institute have carried out a study on operational integration of prevention of natural risks in a sustainable regional development, within the framework of this program.

Stability of cranes under wind loads: a strong demand for expertise

In 2007, CSTB performed 1200 theoretical expertises and 25 wind tunnel tests on the stability of construction tower cranes under wind loads. This is a quickly growing activity that should continue during 2008. Following the principle of precaution, more and more mayors oblige site leaders to appoint inspection offices to do these preliminary studies.

Lighting

Light(s) at Wuhan station

Wuhan is the 12th largest city in China with more than 8 million inhabitants, and is currently building a station worthy of the spectacular development of the country and the Province of Hubei of which it is the capital. Above the railways, the entrance and central space promise to extend under an immense roof covered with a reflecting aluminum sun-shade made by an Italian manufacturer. AREP, SNCF’s design and engineering office subsidiary responsible for the project, called in CSTB lighting experts to provide a precise solution to a Chinese owner who enjoys artificial light and night magic.

Sustainable development

3D model for Nice Côte d'Azur airport

The 3D model of Nice Côte d’Azur airport made by CSTB is capable of simulating even the most minor site developments, evaluating their impacts and communicating with the public through the Joystick.

Environment multi-stakeholders Meeting: Alain Maugard, leader of the "New or private buildings" committee

On December 19, 2007, Jean-Louis Borloo, Minister of Ecology, Sustainable Development and Planning, presented a first summary of progress made in the Grenelle de l’Environnement (Environment multi-stakeholders Meeting) and announced opening of 33 "sites". These sites are run by operational committees.

Climate change and the built environment: a CSTB coordinator at the International Building Council

Jean-Luc Salagnac, engineer at the Economics and Human Sciences department of CSTB, has been appointed coordinator of the W108 commission (Climate change and the built environment) of the CIB (International Council for Research and Innovation in Building and Construction, Conseil International du Bâtiment). Jean-Luc Salagnac, who is also running the "Impact of climate change on the built environment" project at CSTB, joined the W108 group as soon as it was created in 2002.

Recycled waste, preserved environments

Recycling of waste is a theme on which CSTB is particularly active in terms of research and consultancy. The objective is to provide manufacturers and communities with tools that enable them to transform their voluminous waste into secondary raw materials.

New communication technologies

eXpert: communicate better to build better

Digital technologies, new communication methods and the emergence of new professional practices are revolutionizing the world of building. Professionals are working together to face these major changes. The eXpert project is one specific example. It is financed by the Enterprises General Directorate in the Ministry of the Economy, Finances and Employment (call for project TIC PME 2010), and is intended to harmonize and develop the use of information and communication technologies (and particularly digital models) by professionals to improve quality and productivity for the benefit of everyone.