DOT Cargo Securement Requirements 3

Question 1

Under 49 CFR Part 393, what is the required deceleration resistance for cargo securement systems?

Accepted Answer

0.8 g

Answer

Cargo securement systems must resist 0.8 g of deceleration in the forward direction per FMCSA standards.

Question 2

Which type of load is exempt from standard tiedown requirements and may instead use a friction mat alone?

Accepted Answer

Cargo in an enclosed trailer with full contact floor

Answer

Cargo contained within a fully enclosed trailer may rely on the trailer walls and floor friction without additional tiedowns in some configurations.

Question 3

What is the minimum angle a tiedown must form with the horizontal surface to be counted toward the WLL calculation?

Accepted Answer

30 degrees

Answer

Tiedowns must form an angle of at least 30 degrees with the horizontal to provide effective vertical force on the cargo.

Question 4

When inspecting a vehicle carrying heavy machinery, what must the inspector verify regarding blocking and bracing?

Accepted Answer

Blocking must be capable of withstanding the forces applied by the secured cargo

Answer

Blocking and bracing must be strong enough to bear the forces generated by the cargo during transport.

Question 5

What regulation governs the securement of large boulders on flatbed trailers?

Accepted Answer

FMCSA has specific rules for naturally formed stone

Answer

49 CFR Part 393 subpart I includes specific securement requirements for naturally formed stone products including boulders.

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