The composite construction is a modern building method that is based in the combination of steel cross sections and reinforced concrete elements and is aimed at the maximum possible utilization of their properties to the benefit of the structure. The construction of the composite structure from a metal bearing body is also far superior to the classical prefabrications. The flexibility of composite construction in terms of the architectures that can be achieved, as well as the anti-seismicity provided by the accompanying technological superiority can not be answered in classical prefabricated buildings.
Advantages over conventional
- Provides an anti-seismic shield. The supports and beams have been replaced by structural steel cross sections the can provide an anti-seismic shield for the building.
- Ensures constant and high level construction specifications due to the use of industrial elements.
- Provides freedom of architectural design. Allows the design of large uniform spaces without any intervening support structures.
It is recommended for the construction of high rise buildings without the use of large cross sections.
- Favors the vertical expansion, due to smaller weight.
- Requires a shorter time of delivery (approximately one half of the conventional)
- Provides a reduced contribution in social security stamps (50% less than conventional).
- Requires a lower cost for foundation due to smaller loads borne.
- Because the specific construction method is recommended worldwide and in Greece and in particular, in areas with a high seismic activity due to the high strengths in case of earthquake.
- There is no transportation cost involved (in the case of composite construction, the metal framework is built at the job site and can be erected with a few hours at the project site).
- Easy restoration of damages.
- It is the building method that was used in all of the major Olympic projects.
Time of Delivery
The time of delivery required for a house of area 100-120 m2 is 90 – 150 working days.
The system consists of a metal frame (columns, beams, diagonal stiffeners), which are connected to each other by screw connections composing the load-bearing structure of the building. The cross-sections are obtained after a static study of the body, according to the Eurocodes and are open or closed cross-sections.
The slabs are made of reinforced concrete and can be concreted in formwork (just like in conventional construction) or in metal formwork from trapezoidal sheet metal. The whole plate is then plastered. In the case of the prototype it is simply painted. The cooperation of the metal elements and the concrete of the slabs is achieved by placing shear nails in the upper tread of the beams on which the slabs are based. Plasterboard for the interior and cement board or waterproof plasterboard for the exterior are placed under the metal form.
Masonry with ytong
Ytong is an industrial material with thermal insulation properties. Due to the properties of the material it is not necessary to add additional insulation. The final surface is formed with plaster and is 12.5-15 cm for the inner walls and 25 cm for the external ones.
Industrial panel masonry
The industrial panel is a structural element consisting of two parallel grids and a slab of self-extinguishing expanded polystyrene between them. The two grids are held parallel to each other by diagonal galvanized bars. After placing and supporting them between the metal columns, aerated concrete and plaster are sprayed. The final thickness of the masonry is 15 cm for the interior walls and 25 cm for the exterior.
Masonry with bricks
The external masonry is made of bricks measuring 18x18x32 (solid bricks) and the internal masonry with 12-inch bricks. The thermal insulation is made on the outer surface of the external masonry with the thermal facade system.