Rigging and sling angle calculations
CHST video lesson, 6:21. CHST Domain 1: Hazard and Risk Identification and Control
Calculate load angle factor and leg tension for a two-leg bridle at 60, 45 and 30 degrees, and see why only two legs count, why 30 degrees is the floor, and how choke angle cuts capacity.
Included with every CHST pass, with captions, chapters and the full transcript. Every rule and number is cited on screen to its primary source.
What this lesson covers
In this lesson, you'll learn to: calculate the load angle factor from sling length and height, find the tension in each leg of a two-leg bridle, explain why only two legs are assumed to carry the load, and state the 30 degree minimum and the choker capacity reductions. Sling angles multiply the stress on each leg. The tool is the load angle factor, or LAF. Start with the load at the pick point and the sling length.
- Intro
- Learning objectives
- The core idea
- Worked example
- Angle changes everything
- Worked example
- How many legs carry the load?
- Choker hitches
- Worked example
- On the job
- Common exam traps
- Recap quiz
The video, captions and full transcript are included with every CHST pass. See passes
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