At the end of this module, you will be able to:
- Define and describe rigging and slings
- State the importance of rigging to crane operations
- Identify the different types of sling materials
- Describe the different types of sling hitches
- Identify guidelines for safe rigging including sling angle, load balancing
- Describe inspection guidelines for wire rope, chains, and hooks
- Identify guidelines for rigging storage
The following key questions are answered in this module:
What OSHA regulations are related to crane and hoist rigging?
Several. Check OSHA's Safety and Health Topic page on Crane, Derrick, and Hoist Safety for a list.
What are some of the factors that influence the safety of rigging?
The type of sling, the type of hitch, the sling angle, the load edge sharpness, the load capacity, and the stability of the load.
What materials might a sling be made of?
Common materials include wire rope, chain, metal mesh, and synthetic fibers.
What are some common kinds of hitches?
Vertical, bridle, basket, choker, and "endless slings."
What is a load capacity chart?
A chart that show the load capacities of different types of slings, different hitches, and different sling angles.
Below is a transcript of the video sample provided for this module:
Metal mesh slings are made up of small, connected metal rings or other shapes. This results in a mesh sheet that is flexible and has a large surface area. Metal mesh slings are widely used in metalworking and other industries where loads are abrasive, hot, or sharp. The wide surface area of the mesh prevents single-point stresses that would occur on wire, rope, or chains. Also, metal mesh grips the load firmly without stretching, and helps maintain a balanced load. To prevent the sling or load from being damaged, sometimes metal mesh slings are coated with rubber or plastic.
Use the additional resources and links below to learn more about this topic:
- Occupational Safety & Health Administration (OSHA) – www.osha.gov
- OSHA eTools - https://www.osha.gov/SLTC/etools/steelerection/cranes.html
- OSHA Publications - https://www.osha.gov/Publications/osha3072.html
- ASME – American Society of Mechanical Engineers - https://www.asme.org/products/codes-standards/b30-9---2003-slings