What type of crane utilizes the "anti-two block" devices?

The correct answer pertains specifically to lattice boom cranes, which are equipped with "anti-two block" devices as a safety feature. These devices are essential in preventing the hook or lifting block from making contact with the upper part of the boom or the crane's structure, a condition known as "two-blocking." When two-blocking occurs, it can lead to catastrophic equipment failure or accidents.

Lattice boom cranes utilize this safety feature due to their design, which often allows for significant vertical movement and positioning of the hook. By incorporating anti-two block devices, operators can perform lifts with a reduced risk of damage to the crane and increased safety for personnel in the vicinity.

While other types of cranes, such as tower cranes and mobile cranes, may have similar safety features, the question specifically highlights the use of anti-two block systems in the context of lattice boom cranes, which makes this choice accurate for the context of crane operation and safety training.