- Part of the structure, fitting, or attachment on a vehicle or cargo to which a tiedown is attached.
- A rail along the side of a vehicle that protects the side of the vehicle from impacts.
- A vertical barrier across the front of the deck of a vehicle to prevent forward movement of cargo.
- The load carrying area of a truck, trailer, or intermodal container.
Quote From Page 1 Of The CDL Manual:
Anchor point:
Part of the structure, fitting, or attachment on a vehicle or cargo to which a tiedown is attached.
- None of these vehicles need to pass a safety inspection
- Vehicles with a gross weight of 8,000 pounds or less.
- Vehicles owned or operated by the federal government, which display proof of ownership.
- Farm tractors, machinery and other implements.
Quote From Page 12 Of The CDL Manual:
Garages or service stations licensed by the Department of Transportation may make safety inspections. Second division vehicles not required to pass safety inspections include:
- Vehicles with a gross weight of 8,000 pounds or less.
- Farm tractors, machinery and other implements.
- Vehicles owned or operated by the city of Chicago, which display proof of ownership.
- Vehicles owned or operated by the federal government, which display proof of ownership.
- Vehicles registered as recreational vehicles, which display proper plates.
- Properly licensed antique vehicles.
- Specialized vehicles as defined by statute.
- Vehicles properly registered in another state.
- 6 inches apart - 250 pounds per hole
10 inches apart - 500 pounds per hole - 6 inches apart - 350 pounds per hole
8 inches apart - 550 pounds per hole - 4 inches apart - 250 pounds per hole
6 inches apart - 400 pounds per hole - 4 inches apart - 450 pounds per hole
6 inches apart - 200 pounds per hole
Quote From Page 0 Of The CDL Manual:
TruckingTruth's Advice:
- 2
- 3
- As many as possible.
- 1
Quote From Page 3 Of The CDL Manual:
Step #2 and #3: Prevent the Coil from Forward and rearward Movement

At least one direct tiedown is required through its eye, restricting forward motion.
At least one direct tiedown is required through its eye, restricting rearward motion.
- The air compressor pumps air into the air storage tanks
- The air compressor is connected to the engine through gears or a V-belt
- Air compressors are always air cooled
- Air compressors may have their own oil supply or be lubricated by engine oil
Quote From Page 62 Of The CDL Manual:
The air compressor pumps air into the air storage tanks (reservoirs). The air compressor is connected to the engine through gears or a V-belt. The compressor may be air cooled or may be cooled by the engine cooling system. It may have its own oil supply or be lubricated by engine oil. If the compressor has its own oil supply, check the oil level before driving.
- Drive wheel jackknife and trailer wheel jackknife
- Front jackknife and rear jackknife
- Tractor jackknife and trailer jackknife
- Steer jackknife and drive jackknife
Quote From Page 71 Of The CDL Manual:
Tractor Jackknife: Rear tractor wheels locked up or spinning.
Trailer Jackknife: Trailer wheels locked and sliding
- Controls the parking brake on the tractor
- Activates the air compressor located on the trailer
- Supplies the trailer with air from the tractor
- Supplies the tractor with air from the trailer
Quote From Page 73 Of The CDL Manual:
The trailer air supply control on newer vehicles is a red 8-sided knob used to control the tractor protection valve. Push it in to supply the trailer with air, and pull it out to shut the air off and put on the trailer emergency brakes. The valve will pop out, thus closing the tractor protection valve, when the air pressure drops into the range 20 to 45 psi. Tractor protection valve controls or "emergency" valves on older vehicles may not operate automatically. There may be a lever rather than a knob. The "normal" position is used for pulling a trailer. The "emergency" position is used to shut the air off and put on the trailer emergency brakes.
- 11,300 lbs
- None of these
- 5,130 lbs
- 9,200 lbs
Quote From Page 14 Of The CDL Manual:
Size (in diameter):
- 7 mm (1/4 in):
- 8 mm (5/16 in):
- 10 mm (3/8 in):
- 11 mm (7/16 in):
- 13 mm (1/2 in):
- 16 mm (5/8 in):
- Chain Marks -
- Example 1:
- Example 2:
- Example 3:
Grade 70 Transport:
- 1430 kg (3150 lb)
- 2130 kg (4700 lb)
- 2990 kg (6600 lb)
- 3970 kg (8750 lb)
- 5130 kg (11300 lb)
- 7170 kg (15800 lb)
- Chain Marks -
- 7
- 70
- 700
- The left lane
- Whichever lane has fewer waiting vehicles
- Either lane
- The right lane
Quote From Page 32 Of The CDL Manual:
Left turns: Make sure you have reached the center of the intersection before you start the left turn. If you turn too soon, the left side of your vehicle may hit another vehicle because of off-tracking. If there are two turning lanes, always take the right-hand turn lane. Do not start in the inside lane because you may have to swing right to make the turn. Drivers on your left can be more readily seen.
drive axles: 34,100 pounds
Weight transfer: 500 pounds per hole
- steer axle: 11,800 pounds
drive axles: 33,100 pounds - steer axle: 11,300 pounds
drive axles: 33,600 pounds - steer axle: 10,300 pounds
drive axles: 34,600 pounds - steer axle: 9,800 pounds
drive axles: 35,100 pounds
Quote From Page 0 Of The CDL Manual:
TruckingTruth's Advice:
2 holes x 500 pounds per hole = 1000 pounds of weight transfer from the drive axles to the steer axle.
10,800 + 1000 = 11,800 pounds on the steer axle after transfer
34,100 - 1000 = 33,100 pounds on the drive axles after transfer