QTZ100(TC6012) tower crane Dimension of QTZ100(TC6012) tower crane mast section is 1.833*1.833*2.5m, the main material applies 125*125*12 buckled square or 135*135*12 square steel tube. 1. Max. Load: 8t 2. Jib length: 60m 3. Tip load: 1.2t 4. Free standing height: 50m 5. Max. Height: 180m