Metal mesh slings must be removed from service if a reduction in wire diameter due to abrasion reaches what percentage?

Metal mesh slings must be removed from service if a reduction in wire diameter due to abrasion reaches what percentage?

• A. 10%
• B. 25%
• C. 15%
• D. 30%

Answer: (B)

Wear from abrasion thins the wires in a metal mesh sling, which lowers its strength. The safety rule uses a 25 percent reduction in wire diameter as the point to retire the sling. At a quarter thinner, the cross‑sectional area left to carry the load drops significantly, increasing the risk of unexpected failure and a dropped load. Because of that substantial loss of capacity, a sling with 25% or more wear must be removed from service and replaced. If wear is under 25% and there’s no other damage, it may still be used with continued inspection, but any additional wear should trigger retirement.

Wear from abrasion thins the wires in a metal mesh sling, which lowers its strength. The safety rule uses a 25 percent reduction in wire diameter as the point to retire the sling. At a quarter thinner, the cross‑sectional area left to carry the load drops significantly, increasing the risk of unexpected failure and a dropped load. Because of that substantial loss of capacity, a sling with 25% or more wear must be removed from service and replaced. If wear is under 25% and there’s no other damage, it may still be used with continued inspection, but any additional wear should trigger retirement.