Whether Trinity Sling’s outside sales representative comes out to customers’ location or customers bring in rigging, Trinity visually inspects rigging for any signs of damage or deformation. Trinity Sling checks products for visible damage, cracks, wear, and other similar degradation. Trinity inspects to make sure that problems do not follow customers into the field and protects all products from rust and other corrosion.

For safe operation, rigging MUST undergo periodic inspections! These important inspections help reduce rigging hazards and help determine when to replace a product.

Trinity makes inspection easy by keeping customer inspection records so that customers can pinpoint problems and ensure correct periodic inspection intervals. ALL LIFTING SLINGS MUST BE PROPERLY TESTED.

To learn more about Trinity Sling’s inspection process, please call 877.589.2404 or email


Certification Procedures

Before Trinity Sling sells its rigging, or when customers return rigging for inspection and recertification, Trinity subjects each piece to the testing and certification process as follows:

Trinity Sling visually inspects for any signs of damage or deformation.

Trinity Sling pull-tests the rigging and certifies that each item is rated to the required Work Load Limit (WLL).

Test Certificate
Trinity Sling supplies a test certificate for each item. The certificate shows the time tested against the load tested and certifies the rigging for continued service.

All certified rigging equipment is tagged to show it meets guidelines for the specified WLL. Note: Rigging missing tags cannot be retagged without first being certified.

To learn more about our pull testing and certification process, please call 877.589.2404 or email


Certificates for Passing Inspection and Test

All slings are fabricated, inspected, tested and certified according to, and rated capacities are based upon the following (as applicable):

  • Federal Specifications ASME B30.9
  • The Wire Rope Technical Board’s Wire Rope User’s Manual
  • Wire Rope Sling User’s Manual
  • The Web Sling & Tie-Down Association’s (WSTDA’s) Recommended Standard Specification for Synthetic Web Slings

Only slings passing the appropriate testing are certified.

As part of the certification process Trinity Sling uses industry terminology to describe the testing process and limits as follows:

  • RATED CAPACITY: The load that a new assembly may handle under given operating conditions and at an assumed DESIGN FACTOR.
  • PROOF TEST: A nondestructive tension test made by the assembly Manufacturer to verify the construction and workmanship of the individual assembly(ies).
  • NOMINAL STRENGTH: The published (catalog) strength calculated by a standard procedure that is accepted by the industry.

Trinity Sling Authority has no control over the use of any product. The usability and suitability of any product for use is the sole responsibility of the purchaser and/or end user. NEVER EXCEED THE RATED CAPACITIES.

To learn more about Trinity Sling’s test certificate process, please call 877.589.2404 or email