Lifting exclusion zones: load routes, pedestrians and stop conditions
30-second summary
A lifting exclusion zone is more than a circle around the crane. Review the route from pick-up to landing, possible rotation or swing, and gaps where a person could be crushed. Match the field boundary to the planned route and establish how to stop when communication is lost or a person enters.
- Material on the floor: check its starting position and the space available around it before lifting.
- Landing supports: check where the supports are placed and compare their position with the lifting plan.
- Exclusion boundary: Before lifting, cordon off the entire load travel path and confirm the access limits for authorized personnel.
- Pedestrian detour: the route is immediately beside the work area, with no barrier between them. If the load passes close to the route, check whether a boundary on that side or a stop to pedestrian traffic is needed.
Preparation: assess pick-up, travel and landing
At pick-up, identify what remains connected to the object. Pulling an item free from bolts or pipes with a crane is different from lifting a free load. Establish weight, shape, separation status and personnel positions before rigging. If the item sits on a pedestrian route, consider access from the preparation stage.
Do not select the route by straight-line distance alone. Examine structures, power lines, adjacent operations and turning space, including work or passage on lower levels. Put foreseeable restrictions into the plan rather than improvising a route to avoid an obstruction. Reassess when a change becomes necessary.
Prepare supports and the approach sequence at the destination. Check that rigging can be released after landing and that the next handling stage is ready. Holding a suspended load while waiting for supports prolongs exposure and restrictions. Check the receiving vehicle or crew before starting.
Closing a passage requires an alternative route. Someone arriving at the barrier without a way around may attempt to enter. Inform passage users and delivery vehicles, and make the diversion clear at the control point. Correct any layout that obstructs emergency access first.
Figure 3 highlights the checks described here.
Before lifting, check the bearing capacity of the ground where the equipment will be set up.
Receiving a long or asymmetric object
For long material entering an opening, assess ground control and the elevated receiving point separately. Below, falling material and equipment movement are hazards; above, a person may be between the load and the opening edge. Look for any unspoken expectation that a worker will lean out to catch the material. Access control does not replace fall protection at the opening.
Changing rigging or forcing orientation while a load hangs because it will not fit creates a different task. Assess geometry, entry direction, attachment points and receiving space beforehand. If the actual conditions do not fit the plan, stabilise and reassess the method. Do not make manual correction of a suspended object's position the default solution.
Check whether landing supports provide stability rather than supporting only part of the object and causing tilt. Consider accessory-release sequence and hand positions. Releasing tension before stability is achieved can change movement. Define who can approach at each condition, treating crane movement and receiving work as one operation.
For transfer to a vehicle, coordinate the sequence so vehicle and lifting-equipment movements do not overlap. A small repositioning can change a gap occupied by ground workers. Check vehicles outside the marked line against the turning path too. Prepare the landing location to avoid people pushing a load into position outside the driver's view.
Planning needs the basis for the weight as well as the weight itself. Contents or attached parts can make an external estimate unreliable. A machine's rated load is not the object's actual mass. Verify load, working radius and other operating conditions against equipment information; a controller's vigilance cannot replace missing data.
Revise the field boundary when work changes. If the destination or approach direction changes, check whether the boundary still encloses the new route. Passing once while nobody was present does not remove the need to control that section. Consider the next load and other teams' planned access, and maintain responsibility through completion.
The danger area changes as the load moves
Hook position does not describe the whole suspended object. A long item can sweep into another area as it rotates, and the gap to fixed equipment narrows during landing. Slow movement does not protect a person standing in that gap. Include length, shape and projections when setting the boundary.
As the load leaves the ground it may tilt according to its centre of gravity and rigging. If movement differs from the plan, follow the stop-and-reassess procedure rather than trying to correct it by hand. Accessories and securing methods must suit the actual item. A larger exclusion zone cannot compensate for unsuitable rigging.
The danger continues at the destination. A load can overturn or shift before it is stable on its supports, and hands can be trapped during release. A plan that clears the space below the load but leaves the receiving worker between it and a fixed object remains hazardous. Provide room for landing and for people to withdraw.
Consider the equipment's own movement separately. Position, ground and neighbouring structures affect stability and contact hazards. Controlling the load route may still leave rear equipment movement or approaching vehicles unaddressed. Draw equipment, load and people movements separately, then examine their intersections.
Figure 2 highlights the checks described here.
- Define the pick-up zone to check whether people are close to the load.
- Set the exclusion boundary along the travel path to prevent access beneath the load.
- Check the landing area separately and prepare space and supports.
- Mark a pedestrian detour so people travel outside the load path.
Execution: sections with interrupted visibility or signals
Check whether the signaller can observe the hazards the operator needs to know about. The load may be visible while a person at landing or on a lower route is hidden. Select an observation position for the planned route rather than accepting blind spots at a convenient position.
Conflicting movement instructions create uncertainty for the operator. Agree the signalling system and emergency stop communication before work. With radios, verify calling and reception and define stopping on communication failure rather than continuing from an assumed instruction.
If a person enters or the load behaves unexpectedly, stop safely and restore conditions before deciding to proceed. Examine why the person entered, not merely whether they left. If another crew's passage intersects the zone, reconsider timing or the diversion rather than relying only on closer watching.
Do not release the zone before the load is stable and accessories have been safely removed. Coordinate the approach of follow-on handling equipment to avoid overlapping movement. Even a final small movement can change a gap between a person and a fixed object.
Field practitioner note
Planning, signalling and access requirements
Article 38 of the Korean Rules addresses advance investigation and planning for handling heavy loads and communication of the plan to affected workers. Article 39 requires a person to direct the relevant planned work. If the destination or location changes, check whether the plan still covers the conditions.
Article 40 requires an agreed signalling method for lifting operations and compliance with it. Article 146 requires advance access control so a suspended load does not pass over workers' heads. It also addresses movement when the load is not visible and the exception for work under signalling. A blind section needs a signalling arrangement rather than reliance on the operator's guess.
Also consider rated-load markings under Article 133, overload restrictions under Article 135, and accessory safety factors and markings under Article 163. Suitable equipment and exclusion of people are both needed; one does not replace the other. No arbitrary radius is offered as applicable to every lift.
Questions to match the boundary to the plan
Use the table to examine control conditions through pick-up, travel, landing and release. It does not replace equipment-position assessment or accessory selection. Complex lifts need suitably knowledgeable and experienced people to evaluate equipment, load and environment together.
| Stage | Object | Condition |
|---|---|---|
| Departure | Where the load leaves its support | Suspension and nearby contact |
| Travel | Swept and travel path | Entry and blind spots |
| Landing | Supports, hands and fixed objects | Prevent approach or release before stability |
Conditions before a distance number
Set distance from equipment, load, movement, surrounding work and structures. Set the exclusion zone against the equipment layout and actual travel path. HSE lifting guidance provides technical context; Korean provisions govern Korean legal duties.