Wood-concrete composite system

A strong team in the network

Photo of a LENO timber element with concrete layer in the ZÜZBLIN Timber production hall.

In addition to the usual method with subsequent in-situ concrete, the ZÜBLIN timber-concrete composite is also designed as a prefabricated system. This combines the beneficial properties of concrete in the compression zone—acting as a vibration damper and providing mass for sound insulation—with the structural advantages of wood construction. Fire resistance class REI 90 is also achieved in the visible version.

The properties of both materials are utilized by creating a form-fit bond between the wood on the underside and the concrete on the top. The wood takes on the load transfer in the tension zone, while the concrete acts in the compression zone.

Tilman Conrad
Technical Sales Building Systems

You plan

Our wood-concrete composite elements score points for your special requirements

Spans from 6 m

Highly loaded ceilings

Soundproof ceilings

Office, commercial and residential construction

Photo of the assembly of an HBV element. BV Hochhaus Carl Pforzheim.

Your advantages

High load-bearing capacity despite slim panels
Lower weight compared to comparable solid concrete slabs.
Lower component thickness than with a pure wooden ceiling due to the omission of the gravel fill
Vibration behavior can be improved by increasing the concrete content
Effective barrier against the spread of fire
Improved sound insulation (airborne and structure-borne sound) compared to many all-wood constructions
Short construction time thanks to factory-prepared LENO^®elements

Aerial view of a round timber building shell. HBV elements can also be seen.

Ceiling underside in wood look for higher living quality
Simple connection of suspended components or installations/suspended ceilings
Only edge formwork is required for concreting
Optional cambering of the LENO^® elements: no need to undercut the elements during the concreting process = significant reduction in construction time possible
Reduction of CO₂ emissioins by up to two thirds compared to a pure concrete ceiling

Individual options

Every construction project is full of challenges and has different requirements and advantages. So do the various wood-concrete composite systems.

HBV-Kerve
© ZÜBLIN Timber
Proven design variant: HBV-Kerve
Concrete on site
Cost-efficient solution, simple, detachable with screw sleeves
HBV-FT
© ZÜBLIN Timber
HBV-FT
Apply screw connectors & concrete topping on site
Alternative: prefabricated parts ex works, no long drying times, no water ingress into the structure

Services

Ready-to-install LENO^® cross laminated timber ceiling panel prepared for on-site bonding with common HBV variants, with:

Factory-fitted weather protection foil between LENO^® and concrete surface to prevent concrete water from seeping through
Planks inserted in shear connectors at the factory for safe laying without tripping hazards (cut open on site)
Masked bumper strip milling / bumper strips
Element & assembly planning including verifiable structural analysis in accordance with DIN CEN/TS 19103 and vBG
Structural verification for overheight components with waiver of subjugation
Beam layer with in-situ concrete or prefabricated part