Rigging Physics for Rope Rescue

Rigging High Angle

High Angle Advanced Rigging

This two-day Rigging Physics course gives students a working foundation of the basic physical principles that affect rope rescue systems. These principles include friction, tension, compression, arresting force (fall factors), and vectors.

Once rigging physics principles are understood, a variety of rigging systems will be evaluated with a specific emphasis on identifying and managing force multipliers which can undermine the integrity and safety of rescue and rope access rigging.

Day One is classroom instruction. Day Two will be held at Ultra-Safe’s UL testing facility.

Prerequisites: Before attending this class, students need to have previously completed rope rescue and fall protection training.

$545/per person

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Course Outline

Module I: Knots

  • Nomenclature
  • Rope Characteristics
  • Physics Affecting Knots
  • Quality Control

Module II: Compression and Tension

  • Measures of Strength
  • Stress vs. Strain
  • Equipment Loading Factors

Module III: Vectors and Resultants

  • Definitions
  • Adding Vectors and Calculating Resultants
  • Angles of Attachment
  • Force Multipliers

Module IV: Friction

  • Static and Dynamic Friction
  • Coefficient of Friction
  • Friction Formuas

Module V: Static and Shock Loads

  • Forces on Mainlines
  • Forces on Belay Lines
  • Estimating Shock Loads
  • Fall Factors

Module VI: Belay Drop Tests

  • A variety of belay systems will be subjected to shock loads and the results measured.

Course Objectives

At the completion of this training, students should be able to:

  1. Identify the qualities of different rescue knots and how they impact elemental physics of rigging.
  2. Analyze the relationship of compression and tension as they applies to anchors.
  3. Estimate the vectors and resultants of various rope systems.
  4. Analyze static and dynamic friction and its effects on lowering and raising systems.
  5. Analyze and estimate fall factors and shock forces of various belay systems through the use of drop test calculations.
Jim Johnson July 20, 2017
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