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It is a challenge for strucutral engineers and contractors to design and built long span floor systems indifferently of the materials used. This is primarily due to the combination of statical and dynamical issues which have to be considered in the design procedures.

Recent work in USA and Germany has indicated that continuous glued-in metal plates provide a highly rigid and ductile shear connection between wood and concrete in composite action. It is the degree of stiffness found in the following system that allows the suggesfull use of the semi prestressing technology. The developement and application of this continuous wood concrete composite system (hbv-system) has shown an efficient and reliable performance.