Challenge
Steel takes up tension loads and concrete takes up compression loads, so both materials are perfect partners for a composite structure. Is it possible to produce a lightweight lattice girder consisting of an upper and lower chord and filling bars without welding?
Invention
When used as an infill in the chamber of a hollow section, concrete can replace the expensive welded connection between the chords and filling bars in a new composite structure. The RES-Hollow Ceiling I uses multiple girders laid out side by side to create a hollow space between the upper and lower chords.
Advantages
- Substitution of welded connections in a new composite technique
- Cost-effective method of producing wide-span girders
- Improved fire resistance compared to steel girders
Applications
- Girders for a wide range of spans
- Creation of a hollow ceiling with concrete slabs