| Load weight | 750 kg total lifted mass, including lifting accessories | Chain hoist, wire-rope hoist, or overhead crane | Choose equipment with a rated working load limit (WLL) greater than the total lifted mass. | Confirm the load weight from drawings, nameplates, shipping documents, or a verified weighing method. |
| Load shape and center of gravity | Uneven machine with an offset center of gravity | Adjustable lifting beam, spreader beam, or multi-leg sling arrangement | Use connection points that keep the load balanced and prevent rotation or tipping. | Perform a low-height trial lift and stop if the load tilts, shifts, or places unexpected tension on a sling leg. |
| Lift height and travel distance | Vertical lift of 4 m followed by a 12 m horizontal transfer | Overhead crane with suitable hoist and trolley travel | Allow sufficient headroom, hook travel, sling length, and clearance for the full route. | Check that the crane runway, supporting structure, and end stops are rated for the planned operation. |
| Manual or powered lifting | Load below 1,000 kg, limited access, occasional positioning | Lever hoist or manually operated chain hoist | Select a WLL above the lifted mass and a lifting height that covers the complete movement. | Verify that the anchor point can carry the load and that operators can maintain a stable pulling position. |
| Sling configuration | Two-leg sling with legs at 60° from the horizontal | Two-leg chain sling, wire-rope sling, or synthetic sling | Approximate tension in each leg is W ÷ (2 × sin 60°), or about 0.577 × W, before considering other effects. | Use the sling manufacturer's rated capacity for the actual angle, hitch type, and connection method. |
| Low sling angle | Two-leg sling with legs at 30° from the horizontal | Spreader beam or revised lifting arrangement | At 30°, each sling leg carries approximately the full load, W, before other factors are considered. | Avoid shallow sling angles where possible; never exceed the angle limits stated by the equipment manufacturer. |
| Sharp edges and contact surfaces | Steel frame with machined corners and painted surfaces | Wire-rope or chain sling with rated edge protection; synthetic sling only with suitable protection | Use corner protectors, sleeves, softeners, or a lifting beam to prevent cutting, crushing, and abrasion. | Do not allow slings to contact unprotected sharp edges or slide while under tension. |
| Load sensitivity | Fragile instrument cabinet requiring low surface pressure | Synthetic web sling with wide bearing surface and edge protection | Use a configuration that distributes pressure and prevents crushing, scratching, or deformation. | Protect the load from compression and confirm that the sling material is compatible with the load surface. |
| Temperature and chemicals | Outdoor process area with heat, oil, and chemical exposure | Chain or wire-rope equipment selected for the specific environment | Select materials and coatings compatible with the maximum temperature, chemicals, moisture, and corrosion risk. | Check the manufacturer's limitations; do not use synthetic slings where heat or chemicals can damage the fibers. |
| Outdoor ground conditions | Mobile crane operating on compacted soil near an excavation | Mobile crane with properly sized outrigger mats or cribbing | Verify ground bearing capacity and use mats to distribute outrigger reactions. | Keep the crane away from unsupported edges, underground voids, and unstable or waterlogged ground. |
| Headroom and obstructions | Low-clearance building with pipework above the load | Low-headroom hoist, lifting beam, or customized rigging arrangement | Account for hook height, sling angle, hardware dimensions, and the load's highest point. | Complete a route survey and maintain clearance from structures, services, and other equipment. |
| Connection hardware | Four lifting lugs requiring shackles | Rated screw-pin or bolt-type shackles with compatible sling connections | Match shackle WLL, pin diameter, bow size, and loading direction to the connection point. | Load shackles only in the permitted direction and ensure pins are fully engaged and secured. |
| Dynamic or shock loading | Precise lift with no expected impact or sudden stopping | Controlled-speed hoist and properly tensioned rigging | Use smooth acceleration, braking, and positioning; do not rely on WLL for shock loads. | Prevent sudden snatching, side loading, dragging, or dropping that can multiply forces. |
| Inspection and traceability | Equipment used in a routine lifting operation | Clearly identified, inspected, and documented rigging equipment | Each item should have legible identification, WLL, size, and inspection status where required. | Inspect before use and remove equipment showing cuts, broken wires, stretched links, deformation, corrosion, heat damage, or illegible markings. |
| Personnel and worksite controls | Lift performed in an active production area with nearby workers | Planned lift using a competent lift team, exclusion zone, and designated signal system | Use a lift plan covering load data, equipment ratings, route, communications, weather, and emergency actions. | Keep people clear of suspended loads and ensure operators, riggers, and signal persons are suitably trained and authorized. |