| 摘要 |
Prefabricated self-supporting plate comprised, throughout its length, of two double T-shaped concrete ribs and three polystyrene arches of the same edge as the ribs and which, by application inside of a compression layer, form a reinforced concrete. By giving a double T shape to the ribs and by concreting said ribs against the arches, the assembly is embedded and it is possible to step on the arches in the work side with total security. As an alternative, extensions with inferior recess can be arranged at the extremeties of the ribs in order to absorb the thickness of the wing of the semi-prefabricated beams of the type "iron cage with concrete sole" on which they will bear. Thereby, a planor prefabricated structure is obtained onto which the plaster can be applied directly without having to install false ceilings.
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