Production Rigging
Event Rigging Intro
Welcome to Event Rigging 101 – This is a basic outline of some of the equipment regularly used by Frost Productions. Rigging is the practice of SAFELY suspending objects wherever needed to fulfill the requirements of the event. This regularly includes suspending objects over people and/or in some instances near priceless works of art and therefore, the utmost care must be taken to ensure the safety of everyone involved, start to finish.
Common Terminology
Here are some common terms and markings that you will need to know and recognize.
SWL/WLL
Safe Working Load/Working Load Limit--these are interchangeable terms for the same thing: the maximum allowable load for a given piece of equipment. Although the manufacturer has built in a safety factor ranging from 20-100% of the breaking strength, the SWL/WLL must NEVER be exceeded under any circumstance.
Safety Factor
Refers to the “cushion” given for the loading information. Take care when dealing with multiple parties/persons who might also provide a safety factor, resulting in a severely diminished number.
Lateral force
AKA Side loading. This is any force that acts perpendicular to gravity. Gravity is our friend but must be treated with respect.
Dynamic force
Refers to any load subject to movement. This is an important definition and must be taken into account when figuring loads and lifting capacities. Most manufacturers provide charts for static loading only as this is the simplest, and there are innumerable variables to contend with in the real world.
Equipment
Below is a list of equipment that is used every day, with information on how to use and care for it properly.
Round Slings
Round slings aka "SpanSets" come in various lengths, and there are two main types: Nylon and GAC. Both consist of a strong core surrounded by a woven jacket with a label outlining SWLs and a viewing slit for internal inspection.
Nylon
Lightweight and pliable with a synthetic core but vulnerable to high temperatures.
Galvanized Aircraft Cable (GAC)
Strong and flexible with a core of wire strands surrounded by nylon. Can tolerate higher temperatures and is thus preferred by most venues, particularly if open-flame candles or pyrotechnics are in use.
Care and Use
As shown, a simple knot in a single sling is the easiest way to transport them to and from events. It will also prevent a “pile of spaghetti” in the case and helps when counting for inventory. Slings should always be examined for any fraying, cuts, or other damage before use. Slings should never be exposed to harsh solvents or chemicals.
There are many ways to sling a truss, some reduce the capacity while others enhance it. Check the tag on the sling for these figures, and find the right one for your particular application.