ZTT156（ZTT6513）is the main type of ZTM intelligent tower crane. It has a max loadof 8t, a tip load of 1.3t, a jib radius of 65m, and an independent height of  60m.The standard mast section can be equipped with L46A1、L68A1 spliced mastsection or 1.8 * 1.8 * 2.8m fixed section.