What does an activated anti-2 block prevent during crane operation?

An activated anti-2 block is a safety device used in cranes to prevent certain movements that could lead to accidents or damage. Specifically, when the anti-2 block is engaged, it serves to restrict both the hoisting of the load upwards and the extension of the boom. This prevents scenarios where the crane could become unstable, as hoisting and extending simultaneously could cause the load to swing or shift unexpectedly, potentially resulting in a loss of control.

Additionally, by preventing the boom from going down while also restricting upward hoisting, the anti-2 block ensures that the crane maintains a safe operational posture, minimizing the risk of tipping or overloading. These safety mechanisms are critical in maintaining safe operating conditions and protecting both the equipment and personnel involved in crane operations.