The present invention relates to a construction device (DIS). Said construction device (DIS) consists of blocks (BLO1, BLO2) and vertical elements (EVE1, EVE2). Said blocks (BLO1, BLO2) being able to allow the passage within them of said vertical elements (EVE1, EVE2), said blocks (BL01, BLO2) incorporate at least one rigid sheath (FOU11, FOU12, FOU21, FOU22) covering a cavity adequate and dedicated to the passage of at least one of said vertical elements (EVE1, EVE2).
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