Sling standards revised

By Brad Kelechava05 September 2018


Based in New York City, Brad Kelechava is a marketing product specialist for the American National Standards Institute (ANSI). ACT obtained permission from ANSI to print this article, that was originally published as a blog post on June 18, 2018 on the ANSI blog at

The sling, like many other technologies, has roots in warfare. Constructed in various forms since the dawn of civilization, slings were archaic missile launchers, firing projectiles with the energy that one could generate by swinging a rope.

Lead Photo

TNT Crane & Rigging rigged its two Liebherr LR 1350 crawlers with a complicated system of spreader bars, chain falls and slings to lift a 425,000-pound convection section of a crude heater at a refinery in Ponca City, OK.


(Photo Credit: TNT Crane & Rigging)

In the Modern Age, however, the quick and easy conversion of potential energy to kinetic energy by slings has increased the efficiency of numerous industrial practices needing to handle and transport heavy loads. However, if slings are faulty, injuries and even fatalities can result. Therefore, inspection and proper use of slings while considering their environmental conditions remain crucial.

Since 1971, slings have been specified in ASME B30.9. This is actually a “chapter” or “volume” of the overarching ASME B30 standard. Developed by the ASME B30 Standards Committee, this “Safety Standard for Cableways, Cranes, Derricks, Hoists, Hooks, Jacks, and Slings” contains a range of provisions for the construction, installation, operation, inspection, testing, maintenance, and use of cranes and other lifting and material-movement-related equipment.

ASME B30.9-2018: Slings, an American National Standard (ANS), is the latest edition of this volume of the industrial safety standard. Its provisions apply to the fabrication, attachment, use, inspection, testing and maintenance of slings used for load-handling purposes. For the most part, these slings are used in conjunction with equipment described in other volumes of ASME B30. Specifically, ASME B30.9-2018: Slings addresses slings fabricated from alloy steel chain, wire rope, metal mesh, synthetic fiber rope, synthetic webbing, and polyester and high-performance fiber yearns in a cover (or covers).

Standard revisions

ASME B30.9-2018: Slings revises and supersedes the 2014 edition of the same standard. This update contains the following changes

  • Added definitions for denier, high tenacity fiber, original language(s), shall, should, and tenacity.
  • New section on “Rigger Responsibilities.”
  • Section on “Original and Translated Technical and Safety-Related Information” revised entirely.
  • Clarified that a qualified person should, if necessary, determine additional steps that need to be taken after identifying a hazard during inspection.
  • Added guideline that slings in severe or special service should be inspected before each use.
  • Added guideline for maintaining a written record of the most recent periodic inception of slings.
  • Added guidelines for finishing fitting surfaces to remove edges in clause on wire rope, synthetic rope, synthetic webbing, metal mesh slings, and polyester roundslings.
  • Added new section on sling components that employ wire rope slings other than those listed in the standard.
  •  Added new section on methods of fabrication for wire rope slings.
  • Removed guideline prohibiting slings made with wire rope clips being used as a choker hitch.
  • Clarified that a polyester roundsling does not need to be removed due to knots in the roundsling when there are core yarn knots inside the cover installed by the manufacturer during the fabrication process.


ANSI webstore

“ASME B30.9-2018: Slings” is available on the ANSI webstore at It also can be acquired as part of these Standards Packages:

  • ASME B30. Construction Package
  • ASME B30.9 / ASME B30.10 – Slings and Hooks Package
  • ASME B30.5 / ASME B30.20/
  • ASME B30.9 – Mobile and Locomotive Cranes Package
  • ASME B30.2 / ASME B30.9 /ASME B30.10 / ASME B30.20 – Gantry Cranes and Slings Package
  • ASME B30.9 / ASME B30.16 / ASME B30.20 / ASME B30.26 – Slings Hoists and Hooks Package
  • ASME B30.9-2018: Slings is available on the ANSI Webstore at
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