According to ASME B30.20, both the owner of a lifting device (the company) and its operator are responsible for certain guidelines when lifting below-the-hook devices.
1. Establish /Verify Equipment Safety - In order to ensure that below-the-hook equipment meets ASME standards an Equipment Inspection/Testing/Maintenance Program should be put into place. All equipment should be regularly inspected, tested and maintained so that it is in proper working order and records maintained.
2. Use Proper Lifting Devices - Make sure that proper lifting devices are being used for a particular lifting application and that they are being used correctly according to the operating manual.
Vertical and horizontal plate clamps are designed for lifting sheets, profiles or structures in either a vertical and/or horizontal direction. Plate lifting clamps have a built-in safety mechanism which consists of a locking device, a tension spring and a lever. Once the lever has been operated, the safety mechanism provides constant pre-tensioning of the cam on the steel-plate to ensure that the clamp doesn’t slip when the lifting force is applied. When the load is lifted, the clamping force on the cam is increased by the weight of the load.
With their ease of use...