Which sling types are explicitly included in the ASME B30.9 design factor requirement?

• A. Synthetic Web
• B. Synthetic Rope
• C. Synthetic Round
• D. All of the above

Answer: (D)

ASME B30.9 uses a safety margin, called the design factor, to determine safe working loads for slings. That requirement applies to all common sling materials and configurations, including synthetic web slings, synthetic rope slings, and synthetic round slings. The working load limit you use in the field comes from dividing the sling’s strength (minimum breaking strength) by the design factor, ensuring the load stays well below what the sling can withstand even under dynamic or rough conditions. Because the standard explicitly covers these three synthetic sling types, every one of them must meet the same design-factor rule. So all of the listed sling types are included.