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Zorluk: ZorCargo Securement: Blocking and Bracing

Under federal cargo securement regulations (FMCSA § 393.110), an 8-foot-long piece of machinery weighing 4,000 pounds requires at least two tiedowns if it is not blocked against forward movement, but requires only one tiedown if it is properly blocked against forward movement, provided aggregate Working Load Limit (WLL) requirements are satisfied.

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True
The statement is correct because FMCSA 49 CFR § 393.110 explicitly establishes two distinct tiedown schedules: unblocked items between 5 and 10 feet require two tiedowns, whereas items blocked against forward movement by approved blocking or bulkheads require only one tiedown per 10 feet of length (or fraction thereof). An 8-foot item qualifies for the single tiedown rule when properly blocked, provided the tiedown meets the 50% aggregate Working Load Limit.

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1
Evaluate unblocked cargo tiedown requirements under FMCSA § 393.110(b)(1)
Articles longer than 5 feet up to 10 feet in length require at least two tiedowns when not blocked against forward movement.
Unblocked cargo relies entirely on tiedown friction and tension to resist the 0.8 g forward deceleration force during heavy braking.
2
Evaluate blocked cargo tiedown requirements under FMCSA § 393.110(b)(2)
Articles blocked, braced, or immobilized against forward movement require one tiedown for every 10 feet of length or fraction thereof.
Because the 8-foot article is 10 feet or less, exactly one tiedown satisfies the minimum count rule when forward movement is mechanically prevented by blocking.
3
Verify aggregate Working Load Limit (WLL) compliance
The tiedown system must provide an aggregate WLL of at least 2,000 pounds (50% of the 4,000-pound cargo weight).
Meeting the minimum tiedown count is only compliant if the total strength criteria of 49 CFR § 393.106 are also satisfied.
4
Synthesize the conditions and verify the truth value of the stem
The statement accurately reflects both unblocked and blocked regulatory rules.
The regulatory distinction between unblocked (2 tiedowns) and blocked (1 tiedown) for an 8-foot item is correctly stated.

Anahtar Kavram

FMCSA Tiedown Count Reduction Rules for Forward-Blocked Cargo
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Konular

Cargo Securement: Blocking and Bracing

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