Opus quadratum
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Opus quadratum is an ancient Roman construction technique, consisting of squared blocks in parallel lines of the same height.
In roman within the technique comes already used progressively to leave from 6th century BC and affina, with a greater regolarità of the cut and an articulated disposition more of the blocks. The continuous use also after the introduction of cementizio for all the imperial age, placed side by side to the other techniques. The dating criteria that can be use you, in closely local within, are above all the used type of stone, the unit of measure used for the cut of the blocks and the way of disporli in the putting in work. Initially (in that in past "Etruscan way" was defined) the filari of the blocks introduced of the discontinuities and the same blocks were not perfectly homogenous, like in the examples of archaic age in the Etruscan cities and to Rome (reserviors basements, walls of terrazzamento and podi of templi). Subsequently ("Greek way"), the blocks parallelepipedi come disposed in the masonry "of cut" (R-a.vista the side of greater length) or "head" (R-a.vista the side of smaller length, while the greater side extends in the thickness of the wall). Blocks of head and blocks of cut are alternated in various ways in spinning and to spin to the other. It is stretched, moreover, to make to capitare the joints between the blocks in correspondence of the center of the blocks of below spinning. The square work isodoma, derived from Greek models, consists of blocks parallelepipedi of equal disposed dimensions all of cut with the sfalsati vertical joints between spinning and the other. With the introduction of the work cementizia, the continuous masonry in blocks to being used like outer cover. Some blocks, with alternation come inserted "of head", tying the masonry in blocks to the inner nucleus in cementizio. I use of the tile (mattoni) for the outer cover of the nucleus in cementizio, covered then to they time from intonaco or from marble slabs, it involved a lessening in I use of the square work that, however, still will be used, in particular, for parts of the buildings of greater static engagement (arches and pillars, than support the greater weights, bridges, aqueducts, etc).
