Cobiax Void Former System
Cobiax Void Former System is a floor construction system that applies plastics in term of hollow sphere form to replace the amount of concrete in the building floor structure. This can save the volume of concrete and reduce structure weight. There are two forms of Cobiax Void Former System: flat spherical shape and elliptical shape, thus each model can make the floor thickness as following:

Cobiax CLS
Newly designed structural formers for the production of material-efficient, lightweight reinforced concrete slabs.
The innovative product line was developed especially with regard to optimized logistics, assembly,
simple handling on the construction site, robustness, safety and high performance for all slab thicknesses.
Technical Data
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Reduction of concrete: 46–259 L/m²
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Load reduction: 114–649 kg/m²
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CO₂ reduction: 0.01–0.054 t/m²
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Void height: 8–56 cm
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Support height: 11–59 cm
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Bandwidth of slab thickness: 20–80 cm



Cobiax CLS (Concrete Lightweight Structures)
For wider scopes with all kinds of slabs – no matter how thick they are.
Bandwidth of slab thickness 20-80 cm.

Cobiax SL (Slim Line)
For wider scopes with thinner slabs.
Elliptical shape can make the floor thickness between 22 – 56 cm.
Structural engineers can design and modify Cobiax Void Former System based on the construction standards. Additionally, the construction of Cobiax Void Former System has been certified certified by German Institute of Structural Engineering (Deutsches Institut für Bautechnik: DIBt).
Cobiax Void Former System is not only the floor weight lighter but it is also easy to install between the top reinforcement and bottom reinforcement, thus Cobiax void formers are used to replace concrete according to the engineer’s installation plan and floor structure design. The concrete pouring is divided into two phases to make it easier to install and optimize concrete slab construction.
The advantages of Cobiax Void Former System
- Easy to install and use
- Reduce overall construction materials
- Reduce the size of the structure due to the decreased weight of the structure
- Can create an area with a longer span between the columns than the general floor.
- Be innovative product and environmentally friendly





