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Difficulty: MediumCargo Securement: Tie-Down Rules and WLL

A flatbed motor carrier is transporting an unblocked crated industrial air handler measuring 9 feet9\text{ feet} in length and weighing 4,800 pounds4,800\text{ pounds}. Securing this cargo using a single indirect tie-down with a Working Load Limit (WLL) of 3,000 pounds3,000\text{ pounds} meets federal cargo securement standards because the tie-down's rating exceeds 50%50\% of the total cargo weight.

Answer: Answer

Answer

False
The statement is false because federal cargo securement regulations enforce two independent criteria: aggregate Working Load Limit (WLL) and minimum tie-down count. While a 3,000-pound3,000\text{-pound} WLL strap exceeds the required 50%50\% aggregate WLL (2,400 pounds2,400\text{ pounds}), the crated air handler is unblocked, longer than 5 feet5\text{ feet}, and exceeds 1,100 pounds1,100\text{ pounds}. These physical specifications mandate a minimum of two tie-downs regardless of the strength of a single strap.

Step-by-Step Solution

1
Calculate the required aggregate Working Load Limit (WLL) for the cargo.
Required aggregate WLL is at least 50%50\% of 4,800 pounds=2,400 pounds4,800\text{ pounds} = 2,400\text{ pounds}. The provided single strap has a WLL of 3,000 pounds3,000\text{ pounds}, which satisfies the weight threshold (3,000 pounds≥2,400 pounds3,000\text{ pounds} \geq 2,400\text{ pounds}).
Federal Motor Carrier Safety Administration (FMCSA) cargo securement standards require the aggregate WLL of all tie-downs to equal at least one-half (50%50\%) of the cargo weight.
2
Determine the minimum number of tie-downs required based on dimensions, weight, and blocking status.
Since the article is unblocked, weighs more than 1,100 pounds1,100\text{ pounds}, and is longer than 5 feet5\text{ feet} but not more than 10 feet10\text{ feet}, a minimum of 2 tie-downs2\text{ tie-downs} is legally required.
Under FMCSA securement rules, an unblocked article longer than 5 feet5\text{ feet} up to 10 feet10\text{ feet} (or an article 5 feet5\text{ feet} or less weighing over 1,100 pounds1,100\text{ pounds}) requires at least two tie-downs to prevent tipping and shifting.
3
Evaluate overall compliance by combining the WLL and tie-down count requirements.
The securement fails federal standards because only one tie-down is used when two are required.
Both the minimum tie-down count rule and the aggregate WLL rule must be satisfied simultaneously.

Key Concept

Dual securement mandate: Minimum tie-down count and aggregate WLL requirements
Estimated Time:1m 0s
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Topics

Cargo Securement: Tie-Down Rules and WLL

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