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Research and development at CBS-CBT for acoustically high performing timber-floor-system

: Sandoz, J.L.; Leistner, P.

9th World Conference on Timber Engineering 2006, WCTE 2006. Vol.1
Red Hook, NY: Curran, 2006
ISBN: 978-1-622-76285-9
World Conference on Timber Engineering (WCTE) <9, 2006, Portland>
Conference Paper
Fraunhofer IBP ()

The horizontal timber structure like slabs has been much improved by searching in the massive timber panel direction. By using single finger-jointed boards, the O'portune design allows free span from 6m to 11m for usual live loads. From the mechanical point of view, this massive panel concept is working like a diaphragm for seismic loads and can be fire wall for 60min to 120min. From the physical point of view, the internal acoustical comfort characterized by the Sabin coefficient, s is automatically reaching: 0.3 < s < 0.6 in function of the frequency. Both the transmission aerial acoustic and the impact acoustic behavior are improved by using a floating 50mm concrete layer on the timber slab. For higher free span from 10m to 16m, this O'portune design can be coupled to a concrete compression slab including a special steel plate for the mixed connection. In that case, all the performances are positively improved.