United_Bottle

The project of United Bottle was developed by Dirk Hebel, Tobias Klauser and Jörg Stollmann. It is a PET water bottle and a building unit at the same time, which can be normally recycled. It can be distributed in six-packs on containers and collected in plastic waste containers. This makes the bottle suitable for application in catastrophy-hit regions where both drinking water and building material are scarce and in need. The bottle can be used repeatedly for water storage, but there is also a second use: it can be filled with heavy material such as sand and dirt, and then used as a brick. It can also be left empty and used as a building element for a light-weight structure such as an indoor pavilion.
The concept of United Bottle is intended to solve both the garbage problem and the housing need for areas destroyed by hurricane or tsunami. The bottles can be used to build stable walls for temporary and long term shelter – these structures can be covered by tents or other membrane structures. The pieces lock into each other which gives additional stability and resistance to torsion. In 2007 the first prototype of the United Bottle was 3D printed by stereolithography.

United_Bottle filled with water
United_Bottle filled with dirt
United_Bottle filled with sand
Concept scheme of the bottle house
application of United_Bottle
United_Bottle pavilion in Frankfurt
United_Bottle pavilion and the creators
United_Bottle pavilion interior
Bar in Venice built from United_Bottle units

Truss Fab

TrussFab is an integrated end-to-end system that allows users to fabricate large scale structures that are sturdy enough to carry human weight. TrussFab achieves the large scale by complementing 3D print with plastic bottles.

Unlike previous systems that stacked bottles as if they were “bricks”, TrussFab considers them as beams and uses them to form structurally sound node link structures based on closed triangles, also known as trusses. TrussFab embodies the required engineering knowledge, allowing non-engineers to design such structures.

While freestanding bottles tend to break easily, truss structures essentially consist of triangles. In such an arrangement, it is the structure that prevents de-formation, not the individual bottle. The main strength of trusses is that they turn lateral forces (aka bending moments) into tension and compression forces along the length of the edges (aka members). Bottles make great members: while they buckle easily when pushed from the side, they are very strong when pushed or pulled along their main axis. TrussFab affords building trusses by combining tetrahedra and octahedra into so-called tetrahedral honeycomb structures.

Conclusion:

 TrussFab is an integrated end-to-end system that allows users to fabricate large structures that are sturdy enough to carry human weight on desktop 3D printers. Unlike previous systems that built on up-cycled plastic bottles combined with 3D print, TrussFab considers bottles not as “bricks”, but as beams that form structurally sound node link structures also known as trusses, allowing users to handle the forces resulting from scale and load. TrussFab embodies the required engineering knowledge, allowing non-engineers to design such structures and allows users to validate their designs using integrated structural analysis.