Riggers are integral to every lift. With their skills and safe operations below the hook, crane operators can do their job with confidence, knowing their load is safe.
The responsibilities of a rigger are numerous – from selecting the right hardware, to attaching the load to the crane hook. Riggers should be familiar with a variety of equipment and aware of the OSHA and ANSI/ASME standards that govern their particular work site.
Here are some of the types of cranes you may have to rig for:
Mobile Cranes
Called "mobile" since they can move around on the job site. There are two different subsets of crane, categorized by their boom type:
Mobile cranes can be further classified by the type of truck chassis, turntable and wheels they are fixed to.
Overhead Cranes
Overhead cranes are a type of fixed crane, operating on the same course/jobsite each day. Each crane is specifically tailored to a single place and purpose.
Pedestal Cranes
These are most often used off-shore, but can also be found in dockyards. They have the appearance of a lattice boom crane but are supported by a fixed pedestal.
Tower Cranes
The most visible of all cranes, their adjustable height gives them great reach as well as the flexibility to grow in size with the construction itself.
The riggers on any job have a large number of responsibilities. These include:
Selecting the right hardware for each lift is critical. Riggers need to understand the limitations and applications for each type of hardware they select.
Slings
Shackles
Hooks
Turnbuckles
Eyebolts
Connections
To properly execute a rigging job, it is essential to have a good grasp of several mathematical concepts:
At the end of 2021, ASME B30.5 was updated to include a requirement for qualified riggers.
The following four items are key:
Formerly, OSHA only required a qualified rigger under limited conditions. A rigger was considered qualified when they:
OR
OSHA does not require training for riggers, but ANSI/ASME B30.9 and B30.26 specify that users of all types of slings and rigging hardware shall be trained in “the selection, inspection, cautions to personnel, effects of environment and rigging practices”.
There are several levels to which riggers can be trained. While terms like ‘journeyman’ and ‘master’ rigger are used more often in Europe, in the USA, there are two different routes to follow.
The first is through the national certification authority, National Commission for the Certification of Crane Operators (NCCCO). In this case, the levels of training might look as follows:
However, as mentioned above, certification is not mandatory for riggers. It is possible, instead, to follow a different route of training, one which is customized to the particular industry or equipment the individual(s) work with on a daily basis. A training program could be based around the following steps:
See here for a comprehensive guide to choosing the right rigger training.
Regardless of the route you choose, any rigger training should include these fundamentals.
It is important that riggers and supervisors know that there are OSHA and ANSI/ASME standards and regulations that apply to operations below the hook.
In order to work well with your crane operators, it is also useful to be aware of the applicable crane standards:
All NCCCO rigging certifications are good for 5 years. CICB rigging certifications are typically valid for 2-3 years, depending on the program taken.
Fundamentally, a rigger is someone who connects and disconnects the load. The ANSI/ASME standards list 8 responsibilities of a rigger. The depth of expertise necessary in each of these responsibilities depends on the position held. Just as there is usually more than one rigger for each job, there is more than one type of lift that requires a rigger.
This is a term more frequently used in Europe than in the USA and designate4s an advanced rigger, usually an engineer. In the US, it has no regulatory or legal bearing, unlike in the EU.
For many, being a rigger is the starting point for a career in the lifting industry, often for those who would like to work their way up to being a crane operator. Rigging is frequently considered an additional duty rather than a specific job on the worksite, making it a useful additional skill set to have. For those who work on more complex and demanding lifts, being a rigger is a challenging but rewarding job with a lot of responsibility.
The misapplication of rigging is unnecessarily common. In particular, applying rigging to edges without softeners, or choking on attachment points.
Slings typically come in three materials:
Depending on the complexity of the pick, planning a crane lift could be a very involved process. At its simplest, a plan needs to include the following: