The Dahan QTZ50 (4810/5008) is a versatile 4 t capacity hammerhead (top-kit) tower crane with a 48–50 m jib and 1 t tip load, engineered for mid-rise and infrastructure construction. It offers a free‑standing height of 29 m, extendable to 120 m using tie-in, enabling deployment across diverse urban and industrial sites. Equipped with variable-frequency hoist, trolley, and slewing mechanisms, plus advanced safety systems (load-moment, height, slewing limiters), it ensures smooth, precise, and secure operations. The modular top-kit design simplifies logistics and erection, making it ideal for multi-crane arrangements on constrained sites. Built from high-grade steel components and featuring European-grade electrical systems, the QTZ50 delivers reliable performance and CE/ISO-compliant safety. This makes it a cost-effective, high-precision lifting solution for builders and contractors focused on efficiency and dependability.