Hollow-core slab for forming a floor field in which ducts...

Static structures (e.g. – buildings) – Wall – ceiling – or floor designed for utilities

Reexamination Certificate

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Details

C052S220300, C052S503000, C052S606000, C052S607000

Reexamination Certificate

active

06845591

ABSTRACT:
A hollow-core having a first and a second supporting edge to enable a supported floor field to be formed, and including a concrete bottom layer and a concrete top layer connected therewith, while in the bottom layer, from one supporting edge to the other supporting edge, a longitudinal reinforcement is provided. The bottom layer is made of thicker design than the top layer and dimensioned such that it can take up and transmit to the supporting edges the transverse forces, and if desired also the bending forces, expected and foreseen for the hollow-core slabs, so that without any constructional problems, slots extending down to the bottom layer can be provided in the hollow-core slab, for accommodating ducts therein after the rough structure phase. The provision of the slots can be done both at the time of fabricating the hollow-core slabs and on the building site, while filling of the slots can be done in the construction finishing phase with a less high-grade material than concrete.

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