For effective cargo securement, what is the minimum aggregate working load limit (WLL) for tie-downs required for a load that weighs 10,000 kg and relies solely on tie-downs for securement without blocking or bracing?

Question: For effective cargo securement, what is the minimum aggregate working load limit (WLL) for tie-downs required for a load that weighs 10,000 kg and relies solely on tie-downs for securement without blocking or bracing?

Answer options:

• 2,500 kg
• 5,000 kg ✅ 8,000 kg
• 10,000 kg

Correct answer: 8,000 kg

Explanation: The general rule for cargo securement states that the aggregate working load limit of the tie-downs must be at least 50% of the weight of the article being secured. However, for a load requiring securement against forward movement, the securement must withstand 0.8g (80%) of forward acceleration. Therefore, the minimum aggregate WLL must be 8,000 kg (80% of 10,000 kg). (National Safety Code Standard 10, Cargo Securement)