Residential Timber Buildings in Strasbourg, France

Customer Project

Structural Analysis Ingénierie Bois
Bischheim, France
General Contractor and Concrete Design Eiffage Construction
Oberhausbergen, France
Architecture ASP Architecture
Saint-Dié-des-Vosges, France
Investor Bouygues Immobilier
Strasbourg, France

Nowadays’ mastery of design methods and fabrication techniques of CLT panels allow for easier design and construction of high‑rise timber buildings.

‘Îlot bois de Strasbourg’ is one of the first CLT building project in France that exceeds 30 m in height. This building complex consisting of three high‑rise buildings provides commercial premises on the ground floor and 146 residential units on the upper floors. The entire structure has a total area of 9,300 m².

Structure and Design

The structural concept of the building with 11 above-ground floors is based on using several types of the CLT panels, depending on the floor. That is, the higher is the floor the smaller is the panel thickness. The cross‑laminated timber walls ensure the stability of the building.

Due to the diaphragm effect of the floors, the horizontal forces caused by seismic activity and wind are transferred by the vertical supporting members to the foundations.

The floors are supported by a glulam column-beam system that doesn’t contribute to the stability of the building. Some of the timber downstand beams are replaced by steel beams. The bottom reinforced concrete part of the structure (ground floor) is very important as it absorbs the vertical and horizontal loads from the upper floors and transfers them on the pile heads.

For the design of the CLT panels and for seismic analysis, the structural analysis software RFEM has been used.

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RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro - Natural Vibrations  5.xx

Add-on Module

Dynamic analysis of natural frequencies and mode shapes of member, surface, and solid models

Price of First License
1,030.00 USD
RFEM Other

Add-on Module

Deflection analysis and stress design of laminate and sandwich surfaces

Price of First License
1,120.00 USD
RFEM Concrete Structures

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

Price of First License
810.00 USD