GRID FLAT-SOFFIT

14:48 Apr 7, 2004 

13:46 Apr 7, 2004 

13:42 Apr 7, 2004 

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13:40 Apr 7, 2004 

The present invention includes the basic concept of the construction and prestressing principles disclosed in HR-P20000906A under the name �doubly prestressed composite roof-ceiling constructions�. The just-mentioned application discloses constructions with flat plate-soffit over mostly used big spans up to 30 m. Such constructions with full-plate-ceilings are not suitable for spans bigger than 30 m because at spans larger than that the full-plate soffit becomes too weighty what modifies many assumptions which are the basis of the work of the construction at smaller spans making this construction inapplicable. For instance, the distinctly thin full plate, at spans up to 30 m, has the overall depth of 5 cm what provides enough depth for anchoring interconnecting bars into the soffit plate concrete to ensure them from pooling-out. The full, thin soffit-plate, if applied at large spans, requires an increment of depth because its connection to the upper longitudinal construction near supports become too week to bear significant amount of shear.

13:35 Apr 7, 2004