Rigging Math Made Simple

Table of Contents

Part I. Conversions

Lesson 1: Converting between Imperial and Metric

Part II. Pulley Math

Lesson 2: Resultant Forces

Lesson 3: Mechanical Advantage

Lesson 4: Fleet Angles and D:d Ratios

Part III. Bridles

Introduction

Lesson 5: Bridle Lengths

Lesson 6: Tension on Bridle Legs

Lesson 7: Tension on a Horizontal Breastline

Lesson 8: Three-Point Bridle Lengths

Lesson 9: Tension on Three-Point Bridles

Part IV. Truss

Lesson 10: Center of Gravity for Two Loads on a Beam

Lesson 11: Uniformly Distributed Loads on a Beam

Lesson 12: Dead-hang Tension on One End of a Truss

Lesson 13: Simple Load on a Beam

Lesson 14: Distributed Load on a Beam

Lesson 15: Cantilevered Load on a Beam

Lesson 16: Chain Hoists, and Truss, and Lights, Oh My!

Part V. Static and Dynamic Forces

Introduction

Lesson 17: Forces and Design Factors

Lesson 18: Stretch of Wire and Fiber Rope under a Static Load

Lesson 19: Shock Loads

Lesson 20: Wind and Water

Lesson 21: Other Rigging Stuff (that you need to know)

Conclusion

References

Appendices

Appendix 1. Answers

Appendix 2. The TI-30XA Calculator

Appendix 3. Cheat Sheet of Formulas

Appendix 4. What Things Weigh

Appendix 5. Roundslings

Author: Delbert L. Hall Email: delbert@d2flying.com Publisher: Spring Knoll Press Trim Size: 8.5" x 11" Pages: 146 ISBN: 0615747795 ISBN-13: 978-0615747798 Price: $19.95 Tentative Date of Release: March 1, 2013 Description: The job of an entertainment rigger is to safely suspend objects (scenery, lights, sound equipment, platforms, and even performers) at very specific locations above the ground. The type, size and location of the structural members from which these objects must be suspended vary greatly from venue to venue. Additionally, the size, weight, and location of each object varies from object to object. To ensure that each object is safely suspended at the proper location, math is essential. If you want to be a top-notch rigger, you have to know math. Math does not have to be hard. It is a lot like baking - you need a good recipe, and then you just have to follow it - EXACTLY. The purpose of this book is to provide you with the recipe for solving rigging problems. Once you learn the recipes, you will be able figure out many rigging problems. This book is more than a list of formulas - it will also help users grasp some of the principles behind the physics of rigging. By understanding these principles and the math behind them, entertainment riggers should be able to look at many rigging situations and determine if it is “obviously safe,” or “obviously unsafe,” without actually doing any math. However, there are many cases where the load is just uncertain, or the answer is not obvious, and the math needs to be done. This book may be of particular interest to individuals who wish to become a certified rigger. Many of the mathematical problems and other information presented in this book are intended to prepare individual for the types of questions they might encounter on a certification exam – in both theatre and arena rigging. |

Part I. Conversions

Lesson 1: Converting between Imperial and Metric

Part II. Pulley Math

Lesson 2: Resultant Forces

Lesson 3: Mechanical Advantage

Lesson 4: Fleet Angles and D:d Ratios

Introduction

Lesson 5: Bridle Lengths

Lesson 6: Tension on Bridle Legs

Lesson 7: Tension on a Horizontal Breastline

Lesson 8: Three-Point Bridle Lengths

Lesson 9: Tension on Three-Point Bridles

Part IV. Truss

Lesson 10: Center of Gravity for Two Loads on a Beam

Lesson 11: Uniformly Distributed Loads on a Beam

Lesson 12: Dead-hang Tension on One End of a Truss

Lesson 13: Simple Load on a Beam

Lesson 14: Distributed Load on a Beam

Lesson 15: Cantilevered Load on a Beam

Lesson 16: Chain Hoists, and Truss, and Lights, Oh My!

Part V. Static and Dynamic Forces

Introduction

Lesson 17: Forces and Design Factors

Lesson 18: Stretch of Wire and Fiber Rope under a Static Load

Lesson 19: Shock Loads

Lesson 20: Wind and Water

Lesson 21: Other Rigging Stuff (that you need to know)

Conclusion

References

Appendices

Appendix 1. Answers

Appendix 2. The TI-30XA Calculator

Appendix 3. Cheat Sheet of Formulas

Appendix 4. What Things Weigh

Appendix 5. Roundslings