A rigger is a specialist operative who plans and executes the controlled movement of heavy loads — machinery, structural elements, industrial plant, and oversized equipment.
He does that using mechanical lifting systems. In an industrial context, riggers work on manufacturing sites, construction projects, and plant relocation programmes where loads exceed what conventional forklifts or manual handling can safely manage.
The role is technical, physically demanding, and regulated. A rigger is not a general labourer who happens to operate a crane. It is a trained discipline with specific certification requirements, engineering knowledge, and safety responsibilities that are distinct from any other trade on an industrial site.
Providing industrial rigging services is mandatory for industrial relocation.
What Does a Rigger Do?
The core function of a rigger is to connect a load to a lifting device safely and move it to its intended position without incident. In practice, this involves several interdependent tasks:
Load assessment. Before any lift, the rigger must determine or verify the weight and centre of gravity of the load. For industrial machinery, this means checking manufacturer documentation, engineering drawings, or calculating from material specifications. An incorrect weight or centre of gravity assumption is one of the primary causes of rigging failures.
Rigging hardware selection. Based on the load weight, geometry, and available lift points, the rigger selects the appropriate sling type — wire rope, chain, or synthetic webbing — along with shackles, hooks, lifting beams, and spreader bars where required. Every component must have a rated working load limit that exceeds the forces it will experience during the lift, accounting for sling angles.
Lift point verification. Most industrial machinery has designated lifting points specified by the manufacturer. The rigger identifies these points, verifies their condition, and attaches the rigging hardware accordingly. Improvised lift points — rigging from structural members, frames, or attachments not intended for lifting — are a leading cause of equipment damage during machinery moves.
Directing the lift. During the operation, the rigger coordinates with the crane operator or gantry operator, directing load movement through agreed hand signals or radio communication. On a multi-person team, one rigger acts as the designated signaller. No other person gives instructions to the crane operator while a lift is in progress.
Load positioning. At the destination, the rigger guides the load into its final position — often to millimetre tolerances for precision industrial equipment — and supervises the controlled lowering and de-rigging.
Rigger Certifications and Training
In most jurisdictions, operatives conducting crane signalling, load attachment, or rigging supervision on industrial sites are required to hold recognised certifications. The specific requirements vary by country, but the standard expectations in professional industrial environments include:
LEEA-accredited training. The Lifting Equipment Engineers Association sets the global benchmark for rigging and lifting competency. Riggers working for LEEA member companies are trained and assessed against these standards, and their competency is subject to periodic review.
National occupational certifications. In the UK, this includes CPCS (Construction Plant Competence Scheme) cards for crane-related work. In the EU, equivalent national schemes apply. These certifications are typically renewed on a cycle of three to five years and require both theoretical and practical assessment.
Site-specific inductions. On industrial manufacturing sites, riggers are typically required to complete a site induction covering the specific hazards, permit-to-work systems, and emergency procedures applicable to that facility before work begins.
Certifications are not a formality. They are the verifiable evidence that a rigger has been assessed against a defined standard of competency. Requesting certification documentation before a rigger begins work on your site is standard practice — not an unusual demand.
Rigger vs. Millwright: The Practical Difference
These two roles are frequently confused, and on smaller projects they are sometimes performed by the same person. They are distinct disciplines.
A rigger moves the machine. Their expertise is in lifting systems, load dynamics, and the safe translation of heavy equipment from one position to another.
A millwright installs the machine. Their expertise is in mechanical assembly, precision alignment, shaft coupling, and the commissioning of industrial machinery to operational specification.
On a production line relocation, both roles are typically required in sequence — riggers position the equipment, millwrights align and commission it. The quality of the rigging work directly affects the millwright’s task: a machine that has been positioned accurately by the rigging team requires less corrective alignment work and recommissions faster.
Why Industrial Projects Need Qualified Riggers
The consequences of inadequate rigging on an industrial site are not limited to equipment damage. A load that shifts unexpectedly, a sling that parts under tension, or a crane that operates beyond its rated capacity at a given radius can cause structural damage to the facility, secondary damage to surrounding equipment, and serious injury to personnel in the vicinity.
Professional riggers eliminate these risks through engineering rather than caution. The lift plan, the hardware selection, the load calculation, the exclusion zone — each element is designed to make the operation deterministic. There are no surprises in a well-engineered lift.
For plant managers and operations directors commissioning rigging work, the practical implication is straightforward: verify certifications, require lift plans, and treat an unusually low quote as a signal to ask more questions, not less.
FAQ
What is a rigger in construction and industry?
A rigger is a certified specialist who attaches loads to lifting equipment — cranes, gantries, hoists — and coordinates their safe movement. In industrial and manufacturing environments, riggers work on machinery installations, equipment relocations, and plant maintenance projects where loads require engineered lifting solutions rather than standard forklifts or manual handling.
What qualifications does a rigger need?
Riggers working in professional industrial environments hold nationally recognised lifting certifications and, in many cases, LEEA-accredited training credentials. Specific requirements vary by jurisdiction. All rigging hardware they use — slings, shackles, hooks — must have current thorough examination certificates confirming it has been inspected within the required interval.
What is the difference between a rigger and a crane operator?
A crane operator controls the crane — its movement, speed, and load handling. A rigger attaches the load to the crane hook, directs the crane operator during the lift, and is responsible for the rigging configuration. On most industrial lifts, the rigger and crane operator are different people. The rigger has primary responsibility for the safety of the rigging arrangement; the crane operator has primary responsibility for the machine they operate.
Do riggers need to be on site for the full duration of an equipment relocation?
Riggers are required whenever loads are being lifted, moved by mechanical means, or lowered. On a phased production line relocation, this typically means riggers are on site throughout the active move period. For installation work where the machinery has already been delivered and positioned, millwrights take over for alignment and commissioning — rigging involvement at that stage is limited to any supplementary lifts required during the assembly process.
Understanding the role is one thing — applying it correctly in a real project is another.
If you’re planning a lift, relocation, or installation, our team can help you determine exactly what’s required and how to approach it safely.