How should the operator test the brakes before lifting a rated load according to ASME B30.3?

The recommended method for testing the brakes before lifting a rated load, as per ASME B30.3 guidelines, involves lifting the load just a few inches and then applying the brakes. This practice is crucial in verifying that the brake system is functioning properly and can hold the load securely in place. By lifting slightly off the ground, the operator can ensure that the brakes engage as they should without risking the load falling or causing an accident. This method allows for a practical assessment of brake performance in a controlled and safe manner.

In contrast, lifting and holding for an extended period does not effectively demonstrate brake holding power, and lowering the load to the ground is not a test but a return to resting position. A visual check may provide a preliminary examination of the brake system but does not guarantee operational integrity under load conditions. Thus, the described method of lifting a few inches before applying the brakes directly addresses the critical need to ensure safe operational performance before engaging in potentially hazardous lifting activities.