An operator has loaded a 15-tonne excavator onto a gooseneck float. They have used four chain assemblies to secure the machine to the trailer deck. What is the most important factor to consider regarding the Working Load Limit (WLL) of these chains and binders relative to the excavator's weight?

Question: An operator has loaded a 15-tonne excavator onto a gooseneck float. They have used four chain assemblies to secure the machine to the trailer deck. What is the most important factor to consider regarding the Working Load Limit (WLL) of these chains and binders relative to the excavator's weight?

Answer options: ✅ The aggregate WLL of all tiedowns must be equal to or greater than 50% of the equipment's weight.

• Each individual tiedown must have a WLL equal to or greater than the equipment's total weight.
• The aggregate WLL of all tiedowns must be equal to or greater than 100% of the equipment's weight.
• The aggregate WLL of all tiedowns must exceed the equipment's weight by at least 25%.

Correct answer: The aggregate WLL of all tiedowns must be equal to or greater than 50% of the equipment's weight.

Explanation: According to Canadian regulations (e.g., National Safety Code Standard 10), the aggregate working load limit (WLL) of all tiedowns used to secure an article of cargo must be at least 50% of the weight of the article. This ensures sufficient securement without over-engineering.