Web sling inspection

Inspection

If any of the identification items are missing or any of the listed damage criteria are met the sling must be destroyed.

Identification

Synthetic fibre web slings must be permanently identified with the

  1. Manufacturer's name or mark,
  2. Manufacturer's code or stock number,
  3. Working load limits for the types of latches permitted, and
  4. Type of synthetic web material.

Damage

A synthetic fibre web sling must be removed from service when any of the following circumstances occurs:

  1. The length of an edge cut exceeds the web thickness
  2. The penetration of abrasion exceeds 15% of the webbing thickness taken as a proportion of all plies
  3. Abrasion occurs on both sides of the webbing and the sum of the abrasion on both sides exceeds 15% of the webbing thickness taken as a proportion of all plies
  4. Warp thread damage up to 50% of the sling thickness extends to within 1/4 of the sling width of the edge or exceeds 1/4 the width of the sling
  5. Warp thread damage to the full depth of the sling thickness extends to within 1/4 of the sling width of the edge or the width of damage exceeds 1/8 the width of the sling
  6. Weft thread damage allows warp thread separation exceeding 1/4 the width of the sling and extends in length more than twice the sling width
  7. Any part of the sling is melted or charred, or is damaged by acid or caustic
  8. Stitches in load bearing splices are broken or worn
  9. End fittings are excessively pitted or corroded, cracked, distorted or broken
  10. A combination of the above types of damage of approximately equal total effect are present.