Rigging work can look routine right up until a load shifts, a connection fails, or someone steps into the wrong place. Pipes, precast structures, structural steel, equipment, vault sections, and bundled materials can all create serious struck-by and caught-between hazards when they are lifted or moved.
A safe lift depends on more than choosing a sling that appears strong enough. The crew needs to understand the load, confirm the condition and capacity of the rigging, control the area around the lift, and communicate clearly from the first pick through final placement. This construction rigging safety guide provides a practical way to plan those steps.
Why rigging incidents happen
Most lifting incidents involve a combination of problems rather than a single mistake. The load may be heavier or less balanced than expected. The rigging angle may reduce sling capacity. A damaged shackle, hook, or sling may go unnoticed. Ground conditions may affect crane or equipment stability. Workers may also be exposed to a suspended load because the landing area, travel path, or communication plan was not fully established.
OSHA requires rigging equipment used for material handling to be inspected before use on each shift and as necessary during use to ensure it is safe. OSHA also requires defective rigging equipment to be removed from service. These are baseline requirements, not a substitute for lift planning, manufacturer instructions, or site-specific procedures.
The goal is simple: identify the ways a lift can fail or affect nearby people before the load leaves the ground.
Before You Start: the pre-lift planning conversation
For a routine, straightforward lift, this may be a short conversation led by the competent or designated person. Complex, critical, or unusual lifts often need a more detailed engineered or company-specific lift plan. The level of planning should match the risk, not the pressure to get moving.
Before rigging begins, the lift team should be able to answer these questions:
- What is being lifted, and what is its verified or reasonably established weight?
- Where is the center of gravity, and could the load rotate, roll, slide, or shift when tension is applied?
- What approved lifting points, lugs, inserts, or attachment locations are available?
- What rigging will be used, and what is its working load limit in the planned configuration?
- What sling angles will result once the load is connected?
- What equipment will make the lift, and is it suitable for the required radius, configuration, and ground conditions?
- Where will workers stand during the lift, and how will the area be kept clear?
- Where will the load land, and is the landing surface level, stable, and ready?
- Who is directing the lift, and what communication method will the team use?
- Are wind, rain, poor visibility, overhead obstructions, or nearby operations changing the risk?
If the team does not know the load weight or has doubts about the intended attachment point, stop and get reliable information. A guess is not a lift plan.
Know the load and the lifting points
Do not assume the weight
Load weight may be available on shipping papers, drawings, manufacturer information, equipment data plates, or markings on the material. But those records should be checked against the actual item being picked. Added attachments, trapped water, debris, coatings, product inside a vessel, or a bundled configuration can make the actual lift heavier than expected.
For fabricated or irregular loads, weight alone is not enough. The center of gravity affects how the load behaves. A load can rotate suddenly when it clears the ground if the hook is not positioned over its center of gravity or if the pick points are uneven.
Use designated attachment points when available
Use manufacturer-designated lifting lugs, eyes, inserts, and pick points as intended. Do not improvise by attaching to handrails, guards, piping, conduit, forks, or other features that were not designed for lifting. If approved lifting points are missing, damaged, inaccessible, or questionable, involve the appropriate qualified personnel before proceeding.
Workers should stay clear while the load is initially tensioned. A controlled test lift just clear of the support surface can reveal imbalance, shifting, interference, or a problem with the connection before the load is fully raised.
Inspect rigging before the lift
Inspection is not a quick look from a distance. The person inspecting needs enough access and light to see the equipment condition, identification markings, and connection points.
What to inspect
Check the sling, hitch hardware, and lifting accessories for the conditions that apply to their type and manufacturer guidance. Common red flags include:
- Missing, unreadable, or altered identification tags and capacity information.
- Cuts, tears, broken stitching, melted areas, chemical damage, excessive wear, knots, or damaged fittings on synthetic web slings.
- Kinks, birdcaging, broken wires, crushing, corrosion, heat damage, or damaged end attachments on wire rope slings.
- Stretched links, twisted chain, cracks, gouges, nicks, excessive wear, unauthorized repairs, or damaged hooks on chain slings and hardware.
- Hook throat opening, twisting, latch damage, or other deformation.
- Shackle pin damage, body distortion, missing components, or thread problems.
- Evidence that a sling or attachment has been overloaded, shock loaded, or exposed to conditions outside its intended use.
Remove questionable equipment from service according to the employer’s process. Do not try to make damaged rigging acceptable with tape, makeshift repairs, or a decision to “use it for one more pick.”
Match the rigging to the work
Use rigging that is compatible with the load shape, load surface, edge conditions, temperature, and planned hitch. Sharp edges can cut or weaken slings. Use protection that is suitable for the sling and the edge; cardboard, rags, or scrap materials may not provide adequate protection.
Also consider whether the load needs a spreader beam, lifting beam, engineered lifting device, or purpose-built clamp to keep sling angles acceptable and reduce damage to the load. These decisions should be made by people with the necessary training and authority, following the equipment manufacturer’s instructions.
Sling angle changes capacity
As sling legs move farther away from vertical, tension in each leg increases. This is one of the most common rigging safety issues because a sling arrangement can look stable while creating much higher forces than expected.
For example, widening the angle between sling legs increases the force carried by each leg. A rigger should use the sling manufacturer’s angle chart, rated-capacity information, and the planned hitch configuration rather than assuming that two legs automatically carry half the load each.
Keep sling legs as close to vertical as practical, use the correct rigging arrangement, and do not exceed the rated capacity of any part of the system. That includes the sling, hook, shackle, lifting device, attachment point, and the lifting equipment itself.
Control the area, not just the load
A suspended load creates a temporary danger zone. Even a properly rigged load can swing, rotate, or shift due to equipment movement, wind, uneven travel, or a change in center of gravity. The safest place for workers is outside the load path and outside the potential swing or fall zone.
Set an exclusion zone
Before the lift, establish a clear route from the pick point to the landing area. Keep nonessential personnel out of that route. Barricades, cones, flagging, spotters, or other controls may be useful, but the control must fit the active jobsite and be understood by everyone working nearby.
Do not allow anyone under a suspended load. Workers should also avoid standing between the load and a fixed object, truck, wall, trench box, material stack, or other pinch point. If the load moves unexpectedly, there may be no safe way to step clear.
Use tag lines carefully
Tag lines can help a trained worker control load rotation or movement when used under an established plan. They do not make it safe to stand in a line-of-fire position. The person handling a tag line needs a clear escape path and should stay away from pinch points, edges, openings, and moving equipment.
A tag line is not always the right control. It can snag on materials, pull a worker toward the load, or create electrical risk near energized overhead lines. Assess the work area before deciding how the load will be controlled.
Communication must be clear and deliberate
Confusion between the operator, signal person, rigger, and ground crew can turn a manageable lift into a serious event. Identify who is authorized to give signals before the lift begins. Everyone on the crew should know how to give an emergency stop signal.
Use standard signals where they apply and confirm that the operator can see or reliably communicate with the signal person. Radios can be helpful when visibility is limited, but they should be tested before the lift. Keep instructions short and avoid competing directions from multiple people.
If communication is lost, the operator should stop movement until communication is restored. Stopping is not a delay when the alternative is moving a load without reliable direction.
Common rigging mistakes to avoid
- Picking a load with unknown weight: Verify weight and account for attachments, contents, and site conditions.
- Using untagged or damaged rigging: If its capacity or condition cannot be confirmed, do not use it.
- Ignoring sling angles: Use the applicable capacity information for the actual hitch and angle.
- Side loading hooks or shackles: Connect components as intended by their manufacturer.
- Using makeshift lifting points: Lift only from approved, suitable attachment locations.
- Rushing the landing: Confirm dunnage, clearance, and worker positions before lowering the load.
- Putting hands under or between the load: Use tools, planned placement, and clear communication to avoid pinch points.
- Letting production pressure override the plan: Reassess when the load, conditions, crew, or equipment changes.
A field-ready rigging safety checklist
- Confirm the load identity, weight, dimensions, and center of gravity.
- Verify suitable lifting points and the planned connection method.
- Review lifting equipment capacity for the planned configuration and operating conditions.
- Select properly identified rigging with adequate capacity for the hitch and sling angle.
- Inspect slings, hooks, shackles, and accessories before use.
- Protect slings from sharp edges and damaging surfaces.
- Prepare a stable landing area with suitable dunnage or support.
- Establish the travel path and restrict access to the danger zone.
- Identify the signal person, communication method, and emergency stop signal.
- Make a controlled test lift when appropriate, then stop if the load shifts or conditions change.
When to stop the lift
Workers and supervisors should stop and reassess when the load does not behave as expected, the rigging is damaged or difficult to inspect, the load weight is uncertain, the travel path is obstructed, communication is unclear, or weather and ground conditions affect safe operation. A changed condition deserves a new conversation, even if the crew has completed similar lifts before.
Applicable OSHA requirements, employer procedures, equipment manuals, and site conditions may require additional measures. Use a competent safety professional and qualified lifting personnel when the work is complex, high consequence, or outside the crew’s normal scope.
Useful references for lift planning
For current regulatory information, review OSHA’s construction rigging equipment requirements and its cranes and derricks construction resources. The National Institute for Occupational Safety and Health also provides practical information on crane and lifting safety in construction. These resources should be used alongside the manufacturer’s instructions and the project’s safety plan.
Plan the lift before the load leaves the ground
Strong construction safety practices make lifting work more predictable: verify the load, inspect the rigging, account for angles and attachment points, control the area, and keep communication simple. Those actions help protect both the crew making the lift and everyone working around it.
For projects involving excavation, underground structures, or uncertain subsurface conditions, contact Visionary Subsurface Solutions to discuss how early field information can support safer project planning.
