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Rigging
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Rigging

Dette er en engelsk version af 31252-1: Anhugning, oversat i samarbejde med Vestas A/S.

Rigging reviews all the most important aspects of lifting work using cranes and other lifting equipment, including the correct use and maintenance of rigging gear, the assessment of the nature of a load, and finding the centre of gravity of a load. The book provides the necessary knowledge to enable a person to organize and carry out rigging tasks correctly and safely. 

The manual is designed for use on courses within the overall field of crane rigging, for example courses on rigging of loads, rigging on building sites, etc.
The book is intended to provide a source of inspiration wherein course participants can find information that will be helpful in solving course exercises.
The book does not contain any fixed solutions to the tasks set, but describes lifting processes from the point of view of the operator.
The key concepts in lifting work are:
• Personal safety
• Correct use of lifting equipment
• Efficient handling of goods
This book is intended to function as a manual for course participants. The material is organized so that relevant elements match the progression of training itself.
Other pedagogical considerations may mean, of course, that some course tutors will find some sections more useful than others.
Some material and drawings have been taken from publications by the Danish Working Environment Authority (Arbejdstilsynet, AT) or from earlier versions of this book. Other illustrations are reproduced by kind permission of suppliers of hoisting quipment and accessories.
Please note that regulations, requirements can change over time. Always refer to the latest version of local legislation.

Accidents in crane work
Why do things often go wrong?
What does lifting involve?
The lifting process
Assessment and planning
Preparation
Execution
Checking, de-rigging and clearing up
Assessment and planning
Types of goods
Marking of goods
Dangerous goods
Weight calculation
Calculating approximate weight
Detached loads
Centre of gravity
Stable items
Quality work
Overview of normal equipment
Overview of normal rigging methods
Angle of spread and angle of inclination
Load factors
Lifting with more than two points of
attachment
The lifting bar effect
Breaking load and working load
The factor of safety
Special rigging methods and equipment
Examples of rigging solutions
Various components of rigging gear and the assembly of gear
Joining wire ropes
Joining wire rope with wire rope clamps
Joining by crimping
Fibre webbing
Chain
Rings, shackles and hooks
Extending the working life of chain
Assess and plan the lift path
Weather conditions
Assess and plan the set-down area
Preparation
Preparing the set-down area
Preparing the lift path
Preparing the planned equipment
Execution
Lifting and moving the load
Operating cranes and control systems
Warning signals
Emergency stop
Signage
Division of responsibilities and roles
Operating lifting equipment
Types of crane
Communication and cooperation
Radio
Communicating with hand signals
Special signals
Checking, de-rigging and clearing up
Stability factors
Releasing the gear
Cat's paws
Inspection of gear, scrapping
Gear maintenance
Storing gear and clearing up
Glossary
Centre of gravity
Weight calculation table for round and square bar steel
Weight calculation table for strip steel per metre and steel plate per m2
Example of a chain certifi cate
Exercise 1 - Rigging a concrete element
Exercise 2 – Rigging vulnerable goods
Exercise 3 – Sling loading and WLL
Exercise 4 – Personal safety – Dangerous goods
Exercise 5 – Rigging, WLL and weight
Exercise 6 – Practical rigging
Exercise 7 – Communication
Exercise 8 – Maintenance and scrapping
Exercise 9 – Lifting with four points of attachment
Exercise 10 – Rigging a long, smooth-surfaced load
Index

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