... by pins and bolts. The mast is made up of four pieces of mast sections connected by pins, and it is easy ... H3/36B,Q6517,Q6024,QP7527,QD400,QD228,QD160L68B12x2x3 mL200x20Back Buttoned of Channel Steel Q345Q7030,Q7027,Q7022,H3/36B,Q6517,Q6024, ... 85 mFor tower crane Q2200,Q1600Size: 4x4x5.78 mFor tower crane Q1250,Q900Size: 2.45x2.45x5 m For tower crane Q7050BSize: 2.4x2.4x5 mFor tower crane QP8030Size ...