9.3 Metal-Mesh Slings: Selection, Contact and Removal
Key Takeaways
Do not concentrate demand into a few mesh elements or distort a handle.
Coated mesh can have a lower permitted temperature range than uncoated mesh.
New and repaired mesh assemblies require the specified controlled proof test.
Recognize fabric and handles
A metal-mesh sling uses linked or woven metallic elements forming a flexible fabric attached to handles. Its width spreads contact over a larger area than a narrow rope, and its metallic construction can suit particular abrasive or cutting environments. It remains a rated sling with specific bend, handle, temperature and use limitations.
The fabric and handles form one assembly. A handle must transfer force into the fabric and seat properly in the hoist connection. Substituting an improvised handle or connector can change both strength and geometry. Identification must state the rated capacity for the relevant vertical, basket or choker use as required by the applicable standard.
Metal mesh is not interchangeable with chain, wire rope or textile merely because it is flexible. Its surface may mark a finished load, and a coating can change temperature and chemical limits. Select it for the actual material and contact conditions, using the manufacturer’s instructions.
Support the load across the fabric
Arrange the sling so the load is supported appropriately across its width. Avoid concentrating the entire demand on a few strands, cross rods or an edge of the handle. A wide nominal fabric does not provide its full rated behavior if folded, bunched or loaded unevenly.
In a basket hitch, balance and retention still matter. Two fabric portions supply support, but the actual angle, bend and load geometry determine the permitted rating. In a choker hitch, the designed handle arrangement must pass and tighten as instructed without distortion. Do not improvise a choke with an ordinary ring that bends the handle or pinches the fabric.
| Selection question | Application consequence |
|---|---|
| Is the fabric width supported appropriately? | Prevents localized concentration |
| Do handles seat without binding? | Preserves the intended force path |
| Is the hitch approved? | Establishes applicable capacity |
| Is the surface suitable? | Controls slipping and load damage |
| Is the coating compatible? | Avoids applying bare-metal limits to a coated product |
Understand temperature distinctions
OSHA 1910.184 provides an operating range for uncoated metal-mesh slings of −20°F through 550°F without reducing WLL. It gives a different range for slings impregnated with polyvinyl chloride or neoprene: 0°F through 200°F. For service outside those ranges or other impregnation materials, follow manufacturer recommendations.
These provisions do not approve every complete assembly for every exposure within the numbers. Apply any stricter manufacturer conditions and evaluate the load’s surface, fittings and coating. The distinction is particularly important when a protective covering makes a metal sling appear suitable for hot work despite having a lower permitted range.
Inspect fabric and handles
Under OSHA 1910.184, removal criteria include broken welds or brazed joints along a sling edge; specified wire-diameter reduction from abrasion or corrosion; lack of fabric flexibility; specified handle distortion; and cracked or distorted handles. The regulation distinguishes 25% wire reduction from abrasion and 15% from corrosion. Do not use a generic wire-rope broken-wire count for mesh fabric.
The handle’s openings and cross-sectional dimensions also have stated criteria. Identify the original dimensions and applicable rules before evaluating wear. Any cracked handle or distorted attachment requires removal under the applicable condition, even if the fabric still looks broad and intact.
A loss of flexibility can indicate damage or contamination that changes how the sling distributes force. Do not force stiff fabric into position with a hammer. Remove suspect equipment for authorized assessment. Field welding of broken mesh is not a repair method.
Testing and repair
OSHA requires new and repaired metal-mesh slings, including handles, to be proof tested by the manufacturer or equivalent entity at a minimum of 1.5 times rated capacity before use. Elastomer-impregnated slings are proof tested before coating. This is a controlled requirement with identification and records, not permission to overload a sling during an ordinary pick.
Repairs must be performed by the manufacturer or an equivalent entity under the regulation. The repair information and proof-test record establish traceability. A rigger discovering a broken edge weld should remove the assembly from service rather than reduce its capacity by an invented percentage.
Selection example
A supplied mesh sling is rated 8,000 lb in the applicable basket arrangement. The proposed load is 7,000 lb, but its narrow raised ridge concentrates contact into a small part of the fabric. The arithmetic comparison alone is insufficient. Obtain an approved contact arrangement or a different suitable sling. The same issue would remain if a wider fabric were selected without ensuring actual distributed support.
After the lift, release the sling only when the load is stable. Do not drag mesh from beneath a fully weighted object, allow a handle to drop uncontrolled, or fold it sharply for storage. Store it in the approved way so the fabric remains flexible, the handles undamaged and identification readable.
Sources: OSHA metal-mesh sling provisions, CCO reference manual.
Who may carry out the required proof test of a new or repaired metal-mesh sling under OSHA 1910.184?
Any operator during the first production lift
The rigger by adding arbitrary ballast
The manufacturer or an equivalent entity
No one; mesh never requires testing
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