can fetch the next building stone course in the meantime joined together without hinderance thus the building stones are transposed course by course until the wall panel 1 is finished and can be transported away accurate program control of the individual sequences of movement ensures their timed coordination and guarantees working of all components free of interruption which ultimately leads to an exceptionally high production rate the program also determines the height at which the transfer of the building block course from the turnover table 7 to the turnover table 6 is to take place this can be an unchanged position at an average height as indicated in fig1 but the transfer can also take place at a different height in each case so that after the transfer the turnover table 6 does not have to cover a larger travelling distance in the vertical direction in order to transpose the building stone row to the wall the expanded production plant according to fig4 has a rectangular track layout 21 which individual transport cars 22 travel on preferably so as to circulate in the direction of the arrow the wheels of the transport cars can be pivoted about vertical axes and are pivoted.