- A rail along the side of a vehicle that protects the side of the vehicle from impacts.
- A vertical barrier placed directly behind the cab of a tractor to protect the cab in the event cargo should shift forward.
- A strip of material that may be used to unitize articles and is tensioned and clamped or crimped back upon itself. (same as "Strapping")
- A structure, device, or another substantial article placed against an article to prevent it from tipping that may also prevent it from shifting.
From The CDL Manual
Bracing:
A structure, device, or another substantial article placed against an article to prevent it from tipping that may also prevent it from shifting.
- receive a stake or peg, and may also be used as an anchor point.
- prevent it from tipping that may also prevent it from shifting.
- Attach to a tiedown.
- provide greater friction than exists naturally between these surfaces.
From The CDL Manual
Friction mat:
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.
- 18,250 lbs
- 10,000 lbs
- 36,500 lbs
- 4,500 lbs
From The CDL Manual
The working load limit of all components used to block cargo from forward movement must be 50% (or more) of the weight of the article being blocked.
- A structure, device, or another substantial article placed against or around an article to prevent horizontal movement of the article.
- The load carrying area of a truck, trailer, or intermodal container.
- A rail along the side of a vehicle that protects the side of the vehicle from impacts.
- Part of the structure, fitting, or attachment on a vehicle or cargo to which a tiedown is attached.
From The CDL Manual
Rub Rail:
A rail along the side of a vehicle that protects the side of the vehicle from impacts.
- 50% of cargo weight.
- 100% of cargo weight.
- 20% of cargo weight.
- 10,000 lbs.
From The CDL Manual
Note: Friction mats provide a resistance to horizontal movement equal to 50% of the cargo weight that is resting on the mat.
- 8,000 lbs.
- 10,000 lbs.
- 4,000 lbs.
- 4,500 lbs.
From The CDL Manual
The manufacturer’s working load limit is reduced by 50% for tiedowns which are directly attached from the vehicle to the article, and tiedowns attached to the vehicle that go around, through or over the article and are reattached to the same side of the vehicle.
- 30 degrees.
- 90 degrees.
- 100 degrees.
- 45 degrees.
From The CDL Manual

A direct tiedown is considered effective against forward and rearward forces if it makes an angle less than 45 degrees when viewed from the side of the vehicle.

A direct tiedown is considered effective against side-to-side forces if it makes an angle less than 45 degrees with the horizontal when viewed from the front or rear of the vehicle.
- Void filler.
- Dunnage bag.
- Tarp.
- Edge protector.
From The CDL Manual
Tarp:
A waterproof sheet used to cover cargo.
- The load carrying area of a truck, trailer, or intermodal container.
- A vehicle especially built and fitted with locking devices for the transport of intermodal containers.
- A reusable, transportable enclosure that is especially designed with integral locking devices that secure it to a container chassis trailer to facilitate the efficient and bulk shipping and transfer of goods by, or between various modes of transport, such as highway, rail, sea, and air.
- A specialized container, primarily used to contain and transport materials in the waste, recycling, construction/demolition, and scrap industries, which are used in conjunction with specialized vehicles, in which the container isloaded and unloaded onto a tilt frame body by an articulating hook-arm.
From The CDL Manual
Container Chassis Vehicle:
A vehicle especially built and fitted with locking devices for the transport of intermodal containers.
- Chock
- Pallet
- Rub Rail
- Wedge
From The CDL Manual
Pallet:
A platform or tray on which cargo is placed so that it can be handled as an article. (Same as "Skid")