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Edge protection must be used if a tie-down could be cut or torn when touching an article of cargo. The edge protection itself must also resist crushing, cutting, and abrasion.
Left: Use of edge protection Right: Edge protector
The material used for blocking or bracing and as chocks and cradles must be strong enough to withstand being split or crushed by the cargo or tie-downs.
This requirement also applies to any material used for dunnage.
If wood is used:
The grain should run lengthwise when using wood for blocking or bracing.
To correctly contain, immobilize, or secure cargo, you need to know about:
Note: These requirements cover many types of cargo except commodities in bulk that lack structure or fixed shape (for example, liquids, gases, grain, sand, gravel, aggregate, liquid concrete). Commodities that are transported in the structure of a commercial motor vehicle such as a tank, hopper, or box.
Note: The Standard sets forth specific securement requirements for certain loads. When transporting these commodities, you must use the specific requirements for that commodity.
All types of cargo must meet one of three conditions:
Cargo cannot shift or tip
Cargo is restrained against horizontal movement by vehicle structure or by other cargo. Horizontal movement includes forward, rearward, and side to side.
Note: If the cargo is contained in a sided vehicle, the vehicle structure MUST be strong enough to withstand the forces described earlier.
Cargo is immobilized by structures adequate strength or a combination of structure, blocking, and bracing to prevent shifting or tipping.
A device placed between the deck of a vehicle and car or between articles of cargo, intended to provide greater friction than exists naturally between these surfaces.
Material used to fill a void between articles of cargo and the structure of the vehicle that has sufficient strength to prevent movement of the articles of cargo.
The summation of the working load limits or restraining capacity of all devices used to secure an article on a vehicle.
If the cargo is fully contained in a sided vehicle, what is the minimum requirement for withstanding sideways force?
Note: If the cargo is contained in a sided vehicle, the vehicle structure MUST be strong enough to withstand the forces described earlier.
A device placed between the deck of a vehicle and car or between articles of cargo, intended to provide greater friction than exists naturally between these surfaces is:
A device placed between the deck of a vehicle and car or between articles of cargo, intended to provide greater friction than exists naturally between these surfaces.
Aggregate Working Load Limit is defined as:
The summation of the working load limits or restraining capacity of all devices used to secure an article on a vehicle.
Which of the following is not a requirement of wood used as blocking or bracing?
If wood is used:
A sided vehicle containing cargo weighing 35,980 lbs must be able to withstand a rearward force of at least:
Note: If the cargo is contained in a sided vehicle, the vehicle structure MUST be strong enough to withstand the forces described earlier.
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