System Cadex is the basic, and Bloco AB the applied, 3-D
modeling CAD system for building design. The user creates
interactively on the screen the model of the structures
which is stored by the system in the database. The
drawings and different kinds of list are produced from the
database automatically according to the respective
templates. Because System Cadex is a native MS Windows
application it integrates easily with other Windows
programmes (like MS Excel, MS Access, etc.) - the system as
well as the OLE technology.
The GIVENT Building System combines the best of the low
weight and elegance of the steel structure with the sound
and fire properties of the concrete building. An essential
goal is to manage the erection of a concrete/steel
construction with minimal use of materials and skilled
labour, but with higher quality (smaller tolerances) than
today. Furthermore the prefabrication level should be
raised to increase quality while reducing building time and
capital need. The solution to all this is obtained by the
usage of old and new materials in new components forming a
'lost mould' concept.
The external walls are prefabricated with finished,
maintenance-free grain facades. The walls are constructed
to work as moulds for concrete and lightweight concrete,
most of which is prefabricated in the factory.
Intermediate walls separating apartments have similar
construction, but the EPS and facade composite grain is
replaced by gypsum boards and the steel profile is slightly
The external wall elements and the intermediate- or gable-
wall are mounted. Horizontal reinforcement iron rods for
the beams are included in the prefabricated wall. Vertical
reinforcement iron rods from the pillars below secure the
continuity of the pillars. The wall elements are mounted
together with the intermediate floor elements which are
prefabricated using the same principle as for the wall
elements. Thus mounted, the complete storey with walls and
floors is left with empty cavities between the elements
which constitute the pillar and beam moulds. Vertical
reinforcement iron rods are placed in the pillar cavities.
Finally the storey is finished by pouring or pumping
high-performance concrete into the pillar and the beam
cavities respectively. In this way the GIVENT method, by
using the elements as moulds, creates the load-bearing
structure. The concrete is protected in the moulds and
within fourteen hours it has developed such strength that
it is possible to continue with the next storey.
The important difference to the ordinary building method,
i.e. to first erect a load-bearing structure which later is
'dressed', GIVENT makes the opposite. First the building
is dressed and then erected by filling concrete into the
dress-prepared cavities which create the load-bearing
pillars and beams.
The concrete used is preferably based on a modified cement
which gives special properties suitable to GIVENT. The
amount of concrete on site is heavily reduced. The
modified cement gives a much faster development and higher
pressure strength. Further, there is no need for vibration
and although the water content is low the concrete
maintains a good flow through the narrow pillars and beams.
The concrete has a very good gluing capacity which adds to
the homogeneity of the construction. The method used also
gives smaller shrinkage than ordinary concrete and
extremely good ageing properties.