What term describes the ratio of the tensile strength of the webbing material to the tensile strength of the finished web sling?

• A. Derating
• B. Fabrication efficiency
• C. L/H ratio
• D. Safety factor

Answer: (B)

Fabrication efficiency is about how much of the webbing’s raw tensile strength actually remains in the finished sling after it’s sewn, attached to hardware, and given any protective features. It describes how effectively the fabrication process preserves material strength, so a sling isn’t weaker than the webbing itself beyond what the design and stitching introduce. In practice, you compare the material’s rated tensile strength to the finished sling’s strength to see what fraction is retained. A higher fabrication efficiency means the finishing steps cause less loss of strength, which is important for meeting the required load rating. This concept is different from a safety factor, which compares failure load to working load limit, and from derating or unrelated terms like L/H ratio, which don’t describe the strength retention through fabrication.