Improved semi-joist, belonging to the family of prefabricated elements for the formation of floors collaborating with overlapping self-supporting slabs, characterized by comprising a skeleton consisting of a reticular metallic fabric to which, by means of a suitable machine, a tubular shape is given whose section corresponds to an inverted t of thick line, whose thickness in the third of the length of the lower horizontal and upper vertical sections of the aforementioned t, whose skeleton is completed with a plurality of transverse stirrups which, like belts, they are arranged equidistant along the entire length of it. (Machine-translation by Google Translate, not legally binding)
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