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Priority to ES0065976UpriorityCriticalpatent/ES65976Y/en
Publication of ES65976UpublicationCriticalpatent/ES65976U/en
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Publication of ES65976YpublicationCriticalpatent/ES65976Y/en
An improved joist, concretely constituted by a prismatic body of flat base, endowed as it is consubstantial, of three superior salient ridges, with the two intermediate channels, presenting the essential characteristic that the central bead, adopts greater height, in order to give space enough to be traversed horizontally, by the fastening bolt of the metal braces, at its highest level to the upper surface of the skylight tiles. (Machine-translation by Google Translate, not legally binding)