They consist in the arrangement, as bottom of the cask (1), of a pluri-grooved sheet (7) which defines a plurality of cylindrical grooves, laterally adjacent and with coplanar mouths, the width of said grooves (7), being at a level with its mouth, corresponding with the spacing between the beams (3) which constitute the supporting structure for the false grated bottom (2), permitting that said supporting structure (3) be outside the receptacle (1), abutting in the first place, on the upper edge of the beams (3) which constitute the same, flat facets (8) of the pluri-grooved sheet (7) which separate the different grooves (7-7') of the same, and immediately on said facets, the marginal zones of the grated modules (2). In this manner, the structure (3), which supports the bottom and the false bottom, is not affected by the soaking or germination processes produced in the inside of the cask, and the cleaning of the chambers (9-9') defined between the bottom (7) and the false bottom (2) becomes comfortable and simple, specifically by the provision of water through the tubes (10) which longitudinally runs through the chambers (9), in sensibly centered arrangement and which counts with radial nozzles for the spraying of the water.
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