What is the difference between SWL and WLL?

• A. SWL stands for Safe Working Load; WLL stands for Working Load Limit.
• B. WLL is the capacity used in modern standards and includes safety factors.
• C. SWL stands for Safe Working Load; WLL stands for Working Load Limit; WLL is the capacity used in modern standards and includes safety factors.
• D. SWL and WLL are unrelated terms.

Answer: (C)

Understanding the difference comes down to what the ratings mean and how safety margins are built in. WLL, or Working Load Limit, is the rating used in modern standards and represents the maximum load that a lifting device is designed to handle safely, with the safety factor already built into that limit. SWL, or Safe Working Load, is an older term that can be used in some contexts, but it doesn’t align with current standard wording and may not clearly specify the safety margin applied. The best choice reflects both the terminology and the fact that modern practice uses WLL with the safety factor included.