Equipped with self- climbing frames which are driven by hydraulic cylinders and which climb up automatically from one floor to another, the placing booms rise with the rising floor, saving time and labor.

Floor-mounted

The tower body of the placing booms is initially anchored to the foundation base. When the second or the third floor of a building is accomplished, the tower body is lifted to a higher floor to be fixed by means of a tower crane. If the floor is large in size, it is advisable to have several tower bodies mounted on the floor with only one boom- assembly mated to them, thereby saving boom- assemblies and cost.