Below-the-Hook Devices and Lifting Fixtures for Machinery

Below-the-hook lifting devices for heavy machinery: classification under below-the-hook standards, proof-load testing, and documentation practices.

When Is a Fixture a Below-the-Hook Device? ASME BTH-1 and B30.20-2025

When a lifting or handling fixture counts as a below-the-hook device under ASME BTH-1-2023 and B30.20-2025, and how OSHA and agency programs treat it.

Proof-Load Testing Lifting and Handling Fixtures: The 125% Rule

Which rules state a 125% proof-load test for lifting fixtures, who they bind, and how OSHA, NASA, Navy and DOE set test load, hold time, retests and records.

Positioning Cranes vs. Standard Overhead Cranes for Precision Lifts

What turns an overhead crane into a positioning crane: fine motion, anti-sway control, torque and brake proving, load sensing, and critical-lift practice.