Where should the hook block be positioned when shutting down an overhead crane?

When shutting down an overhead crane, the hook block should be positioned near the upper limit. This position minimizes the risk of accidents and maintains safety within the workspace. Placing the hook block near the upper limit helps ensure that it is out of the way of any potential activities occurring below.

Keeping the hook block elevated reduces the chances of it being accidentally struck or interfering with other equipment or personnel in the vicinity. Additionally, positioning it high helps prevent any unintentional movements, which could occur if it were left at a more accessible height.

In contrast, positioning the hook block on the ground or at mid-point height does not provide the same level of safety and could pose obstructions or hazards. Having it across the load could lead to an unsafe situation during operation or when the crane is not in use. Thus, positioning the hook block near the upper limit is the best practice for enhancing safety while ensuring proper crane shutdown procedures.