Lifting Work Calculator Application
The ”Close the Hooks” application is designed to support practical worksite operations, especially when lifting tasks require precise planning and mathematical justification. The application helps users calculate:
- Inclination angles and sling tension forces calculated precisely based on lifting angles and pick point locations.
- Load utilization ratio for any type of sling, regardless of whether chains, straps, or other lifting gear are used.
- Symmetrical and asymmetrical lifts – even in cases where differences in lifting loop heights or asymmetrical pick points create complex situations.
- Balancing and center of gravity, such as using a turning pulley or safely lifting tilted elements.
- Shortening requirements for asymmetrical elements.
The purpose of the application is not only to save time, but also to raise the level of safety on construction sites. It highlights the same calculation methods covered in the Close the Hooks book and makes them easy to apply in everyday work.
The application runs in a web browser and requires no installation. It is specifically designed for lifting planners, tower crane operators, signalers, and anyone who wants to move lifting operations away from guesswork and routine — toward measurable and justifiable safety.
The Calculator
By using this calculator, you agree to the following terms of use. Please read them carefully before proceeding.
Want to understand the theory behind the calculator’s results?
The calculator gives you the correct numbers, but if you want to fully understand the mathematics behind lifting angles, sling forces, asymmetrical lifts, load utilization ratios, and balancing, the book explains every model and formula step by step.