Chain Sling and Hardware Riggings

A: Grade 100 lifting chain has a higher nominal strength than Grade 80 chain for the same nominal chain size, but allowable working load limits depend on the applicable chain standard and product specification. The two grades should not be treated as interchangeable without verifying the rated capacity of the complete assembly.

A: A screw pin shackle is commonly used where connections need to be assembled and removed frequently. A bolt-type shackle uses a bolt, nut and cotter pin to secure the connection and is generally preferred for applications where the pin must be more securely retained. The appropriate type depends on the lifting arrangement and operating conditions.

A: WLL is the maximum load a component or lifting assembly is rated to handle under its specified conditions of use. It is not the breaking load. The rated capacity must be interpreted according to the product marking, applicable standard and configuration.

A: Do not assume standard chain slings or rigging hardware are suitable for lifting people. Personnel lifting requires equipment specifically approved and rated for that purpose, together with compliance with applicable regulations and procedures.

A: Check the manufacturer or product identification, WLL, applicable grade or size marking, and any required standard or traceability information. Markings must be legible and consistent with the product documentation and intended use.

A: Angled lifting can reduce the effective capacity of a sling assembly and increase forces on its components. The permitted capacity depends on the sling configuration and angle; use the manufacturer’s rated capacity data for the specific arrangement.