With the OBERNDORFER hybrid systems, the best material properties and connection solutions of wood and concrete are optimally combined with each other. The wooden constructions arranged in the lower ceiling section are not only sustainable and at the same time visual eyecatchers, but also have a lot to offer! They take over the tensile forces and thus contribute significantly to the stability of the ceilings. A better indoor climate and the well-being of the users are additional effects.
The form-fit connection of the timber material elements with the reinforced concrete component is achieved by using our OHC-Connectors. This creates a mutual load-bearing effect (composite effect) between the two different components.
Through this, the advantageous qualities of both building materials can be optimally exploited. The flexible arrangement of the individual composite screws allows the required stiffness of the individual ceiling elements to be precisely adapted to the respective static requirements. This affords a most resource-efficient construction of the slabs.
Benefits
What our systems deliver
good CO₂-balance
optionally a finished wood-surface in visual quality
large spans with low component thickness
optimized use of materials in terms of resource conservation
reduced risk induced by weather- ing during installation due to the protective concrete level
simple and fast assembly
Fire protection
Properties you would not have expected
The lowest level of our hybrid slabs is formed by the wooden structures. When burning from below, a layer of charcoal develops, which slows down further burning. The average burning rate of wooden constructions is 0.65 - 0.75 mm per minute, which corresponds to a burning rate of 4.0 - 4.5 cm per hour.
With our flat- and beamslabs, the usually required fire resistances of R30 - R90 can be achieved economically through optimized positioning of the connectors, screw length, and quantity. The doweltreeslabs achieve R60 from a wood thickness of 10 cm and can be classified with R90 from a wood thickness of 12 cm.
consist of strength-sorted, core-separated, dried, profiled and glue-free squared timber prisms. The squared timber prisms are blend-optimized produced in the sawmill by a two-stem incision in the tree.
GWP
Global warming potential of our Hybrid Systems
The OBERNDORFER hybrid systems achieve a negative GWP - Global Warming Potential. The global warming potential provides information about the contribution of a substance to global warming, relative to carbon dioxide (GWP = 1.0 kg CO₂ eq./kg). As a rule, a period of 100 years is considered. The total greenhouse potential is shown in the GWP-total indicator, which is made up of the indicators GWP-fossil and GWP-biogenic. GWP-fossil includes fossil carbon from greenhouse gas emissions (e.g. combustion) and -binding (e.g. carbonation). In contrast, the GWP-biogenic takes into account the amount of CO₂ absorbed and bound during the life cycle.
The use of wood in our hybrid systems results in a negative global warming potential of the products. The calculation of the global warming potential of the OBERNDORFER hybrid systems is carried out with the IBO guideline values 2020 and for a time horizon of 100 years. The global warming potential of the individual components (cross laminated timber/wooden beams/doweltree, connectors, reinforcement) per m² of floor. The greenhouse gases produced during production or transport are not taken into account.
