PREVIOUS | TABLE OF CONTENTS | NEXT

Wear Standard

(Extracted from CCG "Wear Standards for Cargo Gear")

13.1 With respect to general deterioration, and where doubt exists as to the remaining strength of webbing or rope slings, then one or more sample slings representing the quality of the slings in question shall be tested to destruction. Obviously, poor slings should be culled out.

13.2 Where the safety factor is found to be:

1. 4.5 or better; slings to remain in service without qualification.
2. 4.0 to 4.5; slings to be retired after current cargo operation is completed.
3. less than 4; slings to be removed from service.

With respect to damage occurring on slings and provided that the above safety factors are maintained, the limits of acceptable wear are as follows:

1. Edge Damage
2. • Maximum penetration of any actual cutting, not to exceed an amount equal to the thickness of the webbing.
     
     
2. Abrasion
3. • This may be extensive in areas covering the whole width of the webbing and may be of sufficient depth to sever the surface cordage, particularly in multiple webbing. In any case, the penetration of the abrasion is not to exceed an approximate 15% of the thickness of the webbing, taken as a proportion of all plys. The abrasion, where it approaches the above limit should occur on one side of the webbing only, or proportionate wear on both sides.
     
     
3. Local Damage
4. 1. Warp thread damage up to 50% of sling thickness but not extending to within 1/4 width of the edge, and damaged area not exceeding 1/4 width of the sling, or proportionately warp thread damage to full depth, but not extending to within 1/4 width of the edge, and damaged area not exceeding 1/8 width of the sling.
      
      
   2. Weft thread damage allowing warp thread separation up to 1/4 width of sling - and extending in length not more than twice the sling width.
      
      
4. Reasonable combinations of the above types of damage of approximate equal total effect are acceptable.
   
   
5. Areas of damage reasonably separated should be considered independently.

PREVIOUS | TABLE OF CONTENTS | NEXT