In the world of material handling, the crane often gets all the glory. However, the true "hands" of the operation are the components that sit Below the Hook (BTH). Without the right below-the-hook equipment, a crane is just a hoist without a grip.
Technically known as Below-the-Hook Lifting Devices (BTHLD) under ASME B30.20 standards, this term refers to any device used to connect a crane's hoist to a load. While the crane provides movement, the BTH device provides the secure interface with the cargo.
Rigid frames designed for specific load shapes.
Devices that use mechanical pressure to hold the load.
For smooth or ferrous materials.
Rule #1: The weight of the BTH device is part of the load. If your crane capacity is 10,000 lbs and your beam weighs 1,200 lbs, your cargo limit is only 8,800 lbs.
Governed by ASME B30.20. Every BTH device MUST have a durable Rated Capacity Tag clearly visible to the operator.
BTH devices face more physical abuse than the crane itself.
Normal Service: Yearly inspection.
Severe Service: Monthly or weekly.
"The specialized beams, magnets, and clamps doing the heavy lifting are the unsung heroes of industrial productivity."
