Supporting board perfected for the formation of formwork bottoms, of the type comprising a flattened and hollow body having reinforcement partitions that originate passages of preferably polygonal section, and having on one of its faces, at least one taconcillo as a nerve protruding hollow, characterized in that the aforementioned studs can adopt in their external appearance a trapezoidal shape, with the upper face of increasing or decreasing shape, and of different height and width, the aforementioned studs being completely outside the board itself or embedded in the same. (Machine-translation by Google Translate, not legally binding)
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