How many wraps must always be present on a hoist drum according to ASME B30.3 and OSHA?

The correct answer indicates that at least two wraps of the hoisting rope must always remain on the hoist drum, which is a requirement set by ASME B30.3 and OSHA standards. This safety measure is crucial for several reasons.

First, having a minimum of two wraps ensures that the risk of the rope coming off the drum is minimized during operations. If there is only one wrap, any slippage or sudden force could easily dislodge the rope, potentially leading to accidents.

Second, two wraps provide adequate friction and support, allowing for better control when lifting and lowering loads. This is essential for maintaining stability, particularly when the crane is operating under varying load conditions.

Lastly, adhering to this requirement promotes safety for both the operator and personnel working near the crane, as it lowers the chance of accidents associated with rope failure or unexpected load shifts. It's an essential practice in crane operation to ensure compliance with safety regulations and promote a secure working environment.