Free CDL Permit Classes-Transporting Cargo

CDL Course: Transporting Cargo

This section teaches you about hauling cargo safely. You must understand basic cargo safety rules to get a CDL. If you load cargo wrong or do not secure it, it can be a danger to yourself and others. Loose cargo that falls off a vehicle can cause traffic problems and others could be hurt or killed.

Transporting Cargo Quiz

Quiz

Take the 100 Question MEGA Quiz when you're through with the lessons.

Transporting Cargo Safely

As part of your pre-trip inspection, make sure the truck is not overloaded and the cargo is balanced and secured properly. After starting, inspect the cargo and its securing devices again within the first 50 miles after beginning the trip. Make any adjustments needed.

Recheck. Recheck the cargo and securing devices as often as necessary during a trip to keep the load secure. A good habit is to inspect again after you have driven for 3 hours or 150 miles and after every break you take during driving. Federal, state, and local regulations for commercial vehicle weight, securing cargo, covering loads, and where you can drive large vehicles vary from place to place. Know the rules where you will be driving. You are responsible for not being overloaded.

The following are some definitions of weight you should know. Definitions you should know.

Gross vehicle weight, GVW. The total weight of a single vehicle plus its load.

Gross combination weight, GC. The total weight of a powered unit plus trailers plus the cargo.

Gross vehicle weight rating, GVWR. The maximum GVWs specified by the manufacturer for a single vehicle plus its load.

Gross combination weight rating, GCWR. The maximum GCWs specified by the manufacture for a specific combination of vehicles plus its load.

Axle weight. The weight transmitted to the ground by one axle or one set of axles.

Tire load. The maximum safe weight a tire can carry at a specified pressure. This rating is stated on the side of each tire.

Suspension systems. Suspension systems have a manufactured weight capacity rating.

Coupling device capacity. Coupling devices are rated for the maximum weight they can pull and/or carry.

Legal weight limits. You must keep weights within legal limits. States have maximums for GVWs, GCWs, and axle weights. Often, maximum axle weights are set by a bridge formula. A bridge formula permits less maximum axle weight for axles that are closer together. This is to prevent overloading bridges and roadways. Overloading can have bad effects on steering, braking, and speed control. Overloaded trucks have to go very slowly on upgrades. Worse than making too much speed on downgrades, stopping distance increases, brakes can fail when forced to work too hard. During bad weather or in mountains, it may not be safe to operate at legal maximum weights.

Take this into account before driving. Don't be top-heavy. The height of the vehicle's center of gravity is very important for safe handling. A high center of gravity, cargo piled up high or heavy cargo on top, means you are more likely to tip over. It is most dangerous in curves or if you have to swerve to avoid a hazard. It is very important to distribute the cargo so it is as low as possible. Put the heaviest parts of the cargo under the lightest parts.

Balance the weight. Poor weight balance can make vehicle handling unsafe. Too much weight on the steering axle can cause hard steering. It can damage the steering axle and the tires. Underloaded front axles caused by shifting weight too far to the rear can make the steering axle weight too light to steer safely. Too little weight on the driving axles can cause poor traction. The drive wheels may spin easily. During bad weather, the truck may not be able to keep going. Weight that is loaded so there is a high center of gravity causes greater chance of rollover. On flatbed vehicles, there is also a greater chance that the load will shift to the side or fall off.

Blocking and braking. Blocking is used in the front, back, and/or sides of a piece of cargo to keep it from sliding. Blocking is shaped to fit snugly against cargo. It is secured to the cargo deck to prevent cargo movement. Bracing is also used to prevent movement of cargo. Bracing goes from the upper part of the cargo to the floor and/or walls of the cargo compartment.

Cargo tie down. On flatbed trailers or trailers without sides, cargo must be secured to keep it from shifting or falling off. In closed vans, tie downs can also be important to prevent cargo shifting that may affect the handling of the vehicle. Tie downs must be of the proper type and proper strength. The combined strength of all cargo tie downs must be strong enough to lift one-and-one-half times the weight of the piece of the cargo tied down. Proper tie down equipment must be used, including ropes, straps, chains, and tensioning devices, wrenches, ratchets, clenching components. Tie downs must be attached to the vehicle correctly. Hooks, bolts, rails, rings. See Figure 3.2.

Cargo should have at least one tie down for each 10 feet of cargo. Make sure you have enough tie downs to meet this need. No matter how small the cargo, it should have at least two tie downs. There are special requirements for securing various heavy pieces of metal. Find out what they are if you are to carry such loads.

Header boards. Front end header boards, headache racks, protect you from your cargo in case of a crash or emergency stop. Make sure the front end structure is in good condition. The front end structure should block the forward movement of any cargo you carry.

Covering cargo. There are two basic reasons for covering cargo, to protect people from spilled cargo and to protect the cargo from weather. Spill protection is a safety requirement in many states. Be familiar with the laws in the states you drive in. You should look at your cargo covers in the mirrors from time to time while driving. A flapping cover can tear loose, uncovering the cargo and possibly block your view or someone else's.

Sealed and containerized loads. Containerized loads generally are used when freight is carried partway by rail or ship. Delivery by truck occurs at the beginning and/or end of the journey. Some containers have their own tie down devices or locks that attach directly to a special frame. Others have to be loaded on the flatbed trailers. They must be properly secured, just like any other cargo. You cannot inspect sealed loads but you should check that you do not exceed gross weight and axle weight limits.

Dry bolt. Dry bolt tanks require special care because they have a high center of gravity and the load can shift. Be extremely cautious, slow and careful going around curves and making sharp turns.

Hanging meat. Hanging meat, suspended beef, pork, lamb in a refrigerated truck can be a very unstable load with a high center of gravity. Particular caution is needed on sharp curves such as off-ramps and on-ramps. Go slowly.

Livestock. Livestock can move around in a trailer causing unsafe handling. With less than a full load, use false bulkheads to keep livestock bunched together. Even when bunched, special care is necessary because livestock can lean on curves. This shifts the center of gravity and makes rollover more likely.

Oversized loads. Overlength, overwidth, and/or overweight loads require special transit permits. Driving is usually limited to certain times. Special equipment may be necessary such as wide load signs, flashing lights, flags, etc. Such loads may require a police escort or pilot vehicles bearing warning signs and/or flashing lights. These special loads require special driving care.