| General-purpose lifting |
Compact, balanced loads with suitable lifting points and a clearly defined center of gravity.
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Alloy steel chain sling, wire rope sling, or synthetic web sling selected according to the load and environment.
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Two-leg or four-leg sling assembly connected to rated shackles and the crane hook.
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Confirm the working load limit (WLL), sling angle, load weight, center of gravity, and connection-point capacity.
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Do not exceed the marked WLL. Angled loading can substantially increase leg tension compared with a vertical lift.
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Check identification tags, broken wires, stretched links, cuts, chemical damage, deformed fittings, and latch operation.
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| Sharp-edged or abrasive loads |
Steel plates, fabricated sections, machinery bases, or other loads with edges that can cut or wear the sling.
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Wire rope sling or chain sling; use edge protection when a textile sling is selected.
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Basket hitch or choker hitch with protective sleeves, corner protectors, or softeners at contact points.
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Match the sling type to the edge condition, protect the sling from cutting, and prevent the sling from sliding.
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A synthetic sling can be damaged quickly by an unprotected edge, even when the load weight is within its rated capacity.
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Look for broken or pulled fibers, melted areas, cuts, crushed sections, damaged wire strands, and exposed core material.
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| Hot materials or elevated temperatures |
Molten-metal containers, recently welded fabrications, heat-treated parts, or loads with hot contact surfaces.
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Alloy steel chain sling or a heat-rated wire rope sling, selected for the actual temperature and exposure time.
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Choker or vertical arrangement with heat-resistant connections and adequate clearance from hot surfaces.
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Verify the sling’s allowable temperature range, exposure duration, load stability, and protection from radiant heat.
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Synthetic web and round slings can lose strength or melt when exposed to excessive heat; never rely on appearance alone.
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Inspect for heat discoloration, fused fibers, scale damage, cracked links, deformation, and loss of tag information.
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| Chemical or corrosive environment |
Loads handled near acids, alkalis, solvents, plating baths, chemical process areas, or contaminated surfaces.
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Select chain, wire rope, or synthetic equipment only after confirming chemical compatibility with the specific substance.
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Use compatible shackles, hooks, and protective sleeves; keep the sling clear of chemical pools and residue where possible.
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Identify the chemical, concentration, temperature, contact time, and cleaning method before selecting the sling material.
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Some chemicals attack synthetic fibers, wire rope cores, coatings, or alloy steel. Corrosion may be hidden beneath coatings.
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Check for corrosion, pitting, discoloration, swelling, brittle fibers, coating deterioration, and illegible identification tags.
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| Delicate or finished surfaces |
Painted equipment, polished components, glass-lined vessels, coated structures, or loads vulnerable to dents and scratches.
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Synthetic web sling or round sling with suitable protective sleeves and non-marking contact surfaces.
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Basket hitch with broad load contact, balanced lifting points, and padding at corners and edges.
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Select adequate sling width, protect the sling from edges, prevent point loading, and control load movement.
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Soft slings can be cut or crushed by small-radius edges; surface protection does not increase the sling’s WLL unless specifically rated.
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Inspect the sling body, stitching, protective cover, eyes, fittings, and any areas exposed to crushing or abrasion.
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| Long, flexible, or bending loads |
Beams, pipes, panels, structural members, or loads that may deflect, rotate, or become unstable during lifting.
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Spreader beam or lifting beam with appropriately rated slings, shackles, and connection points.
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Multi-point lift with the beam supporting the load at planned locations to control bending and sling angle.
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Check beam capacity, load distribution, pick-point spacing, headroom, deflection, and the center of gravity.
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A direct multi-leg sling arrangement may pull the load inward, causing bending, crushing, or uncontrolled rotation.
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Verify beam identification, welds, pins, lifting lugs, end connections, locking devices, and evidence of distortion.
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| Low-headroom lifting |
Loads lifted inside buildings, under pipe racks, beneath bridges, or in areas with limited vertical clearance.
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Short-leg chain or wire rope slings, compact shackles, lifting points, or a low-headroom spreader arrangement.
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Keep sling legs as short as practical while maintaining a safe angle and sufficient clearance from the load.
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Calculate total lifting height, include hook and fitting dimensions, and confirm that the crane has adequate capacity at the radius.
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Shortening slings with knots, makeshift devices, or unsuitable hardware is unsafe and can damage the sling.
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Check shortening devices, connectors, hooks, pins, latches, and evidence that the assembly has been altered or overloaded.
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| Uneven or offset center of gravity |
Asymmetrical machinery, vessels with internal components, dies, molds, or loads with unequal weight distribution.
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Adjustable lifting beam, spreader beam, multi-point sling system, or engineered lifting fixture.
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Position lifting points around the calculated center of gravity and use adjustable connections where permitted.
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Determine the center of gravity, verify individual point loads, control tilt, and perform a low-height trial lift.
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An incorrectly positioned sling can cause sudden tilting, sliding, shock loading, or excessive load on one leg.
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Inspect lifting lugs, bolted connections, beam adjustments, shackles, and signs of uneven loading or deformation.
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| Submerged or wet lifting |
Loads lifted from water, tanks, wet processing areas, or locations where equipment may retain liquid.
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Corrosion-resistant or suitably protected rigging selected for the water, salt, chemical, and drainage conditions.
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Use drainage-conscious connections and avoid trapped water or materials that can shift as the load leaves the liquid.
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Account for buoyancy changes, retained liquid, corrosion exposure, suction, and the possibility of sudden load transfer.
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Wet or contaminated slings may have reduced service life; a load can become heavier as water drains during the lift.
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Check corrosion, trapped debris, damaged coatings, stretched fibers, rust scale, and proper drying or cleaning after use.
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| Precision positioning or controlled rotation |
Loads requiring accurate placement, vertical alignment, turning, or controlled orientation during installation.
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Lifting beam, swivel-rated hardware where appropriate, tag lines, spreader arrangement, or an engineered turning device.
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Use multiple controlled attachment points and maintain clear communication between the crane operator and signal person.
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Confirm rotational forces, hardware suitability, sling angles, clearance, and whether the equipment is rated for side loading.
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Standard hooks and shackles are not automatically suitable for uncontrolled side loading, rolling, or twisting operations.
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Inspect swivels, hooks, shackles, pins, welds, tag lines, and any component exposed to torsion or side loading.
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| Outdoor lifting in wind |
Large panels, vessels, duct sections, tanks, or other loads with a substantial projected surface area.
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Spreader beam or lifting beam with tag lines and rigging sized for the load, wind exposure, and planned lift path.
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Use multiple attachment points to improve control and keep personnel outside the suspended-load and swing areas.
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Follow the lift plan and site wind limits; consider sail effect, crane capacity, load control, and nearby obstructions.
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Wind can cause rapid rotation, side loading, loss of control, or contact with structures even when the load is relatively light.
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Check tag lines, connection points, sling protection, hardware security, and weather conditions immediately before lifting.
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| Heavy industrial machinery |
Dense loads with high weight, concentrated contact points, uneven geometry, or uncertain internal components.
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Engineered lifting beam or spreader beam with rated shackles, lifting lugs, and appropriately selected slings.
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Four-point or multi-point lift designed to distribute the load and maintain a stable, nearly level orientation.
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Verify the actual weight, center of gravity, lifting-point rating, crane capacity, floor capacity, and travel path.
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Machinery may contain fluids or movable parts that shift the center of gravity; never assume the transport position is stable.
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Inspect lifting lugs, mounting bolts, shackles, beam welds, sling tags, and evidence of previous shock loading.
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