ZTL146（ZTL4522）is the main type of ZTM intelligent tower crane. It has a max load of 8t, a tip load of 2.2t, a jib radius of 45m, and an independent height of 46.7m. The standard mast section can be equipped with L46A1、L68A1 spliced mast section.

       During the demolition and reconstruction projects, the small tail swing radius of ZTM luffing-jib tower crane can effectively prevent the boom of tower crane colliding with the surrounding buildings. It applies to the site with narrow space, and can play its unique advantages in the high-rise building construction. With super large lifting torque and wide operating range, it also applies to steel structural high-rise building construction. The luffing self-lifting tower crane adopts new design of slewing platform mechanism, which can effectively improve the forced state and enhance the horizontal stiffness.