On 25 November, 2008, QTZ124 (PT6015) flat-top tower crane made its debut at Shanghai bauma exhibition, highly praised by domestic and foreign experts. The flat-top split tower crane was researched and developed independently by the company, with various performance indicators reaching international leading levels. Mast sections are shaped into sheet, convenient for transportation and storage, saving the long distance freight. The main chord of mast section adopts Q345B material, with good environmental adaptability. The mechanism is provided from well-known domestic producers, with reliable performance, excellent speed governing and shockless trait.