OSMOSE OFFICE BUILDING IN STRASBOURG

Construction of an eight-story office building covering 15,000 m² for European institutions in the Wacken international business district in Strasbourg.
All-trades contract.

• Project owner: ICADE
• Project manager: Consortium with OSLO ARCHITECTES (lead) / ARTBUILD ARCHITECTS / OTE / EGIS / CTE / LINDER PAYSAGE
• Methods design office: DEMATHIEU BARD CONSTRUCTION
• Structural design office: CTE
• Duration of work: 21 months
• Energy performance: RT 2012 -30% (French thermal regulation standards)
• Labels and certifications: Chantier Vert / HQE Excellent certification / BREEAM Excellent certification / E+C- label, E2C1 level

CONSTRUCTION METHOD

• • Foundations on hollow auger piles
• • Floors: cast in place for the infrastructure, reinforced concrete precast slabs + compression slab for the superstructure
• • Walls: mostly cast in place for the infrastructure, mostly precast for the superstructure (elevator shafts and stairwells)
• • Beams: cast in place for the infrastructure and precast (reinforced concrete and prestressed concrete) for the superstructure
• • Staircases: flights in precast reinforced concrete

TECHNICAL CHARACTERISTICS

• • Two underground levels, with the water table lowered in order to build the lower level
• • Curtain wall facades
• • Three accessible green terraces

KEY WORKSITE FIGURES

• Concrete for structure: 11,000 m3
• Reinforcements for reinforced concrete: 800 metric tons
• Floor space: 20,000 m²
• Wall surface area: 6,500 m²
• Beams: 3,500 ml
• Curtain wall facade: 7,000 m²
• Number of production hours: 200,000 hours for all trades, of which 45,000 hours of structural work
• Total number of integration hours: 14,640
• Average number of supervisors and workers: 8 supervisors on average and 20 workers on average during structural work period