When you’re running a fleet, keeping every load safe isn’t just important—it’s your responsibility. You can’t afford any mistakes when it comes to cargo securement. Damaged loads, injury risks, and potential fines land right on your desk, not the driver’s. That’s why you need to know what’s considered ‘unsecured cargo’ in a semi-truck and how it can put your team and your bottom line at risk.
Let’s look at the specific ways cargo becomes “unsecured” and what that actually means for your trucks.
Not Using Enough Tiedowns
The most common reason for unsecured cargo is simply not using enough restraints. Federal regulations are strict about this. You need a certain number of tiedowns based on the length and weight of the article being transported. If a driver uses two straps when the law requires three based on the load’s weight, that cargo is technically unsecured.
So how do you determine the number of restraints needed? The rules are as follows:
- For articles 5 feet or shorter and weighing 1,100 pounds or less, you need one tiedown.
- For articles longer than 5 feet but 10 feet or shorter, you need two tiedowns.
- For articles longer than 10 feet, you need two tiedowns for the first 10 feet and one additional tiedown for every 10 feet (or fraction thereof) beyond that.
Damaged or Worn Equipment
You have your freight secured with the right number of restraints, including a strap, chain, and a load bar. But that means nothing if, say, the load bar has wear and tear that makes it unreliable.
A strap with a cut, a chain with a stretched link, or a load bar with a broken ratchet mechanism all count as unsecured cargo. Inspectors look for these defects specifically. If a piece of equipment fails under stress because it was already weakened, the cargo becomes a projectile.
Improper Blocking and Bracing
Sometimes, the issue isn’t the strap over the top, but what’s happening underneath or alongside the freight. Cargo needs to be immobilized so it can’t shift forward, backward, or sideways, which is achieved through blocking and bracing. Blocking and bracing are securement techniques where lumber or metal bars are fixed to the floor or walls to create a physical barrier (blocking) and reinforce the cargo’s position (bracing) to prevent movement during transit.
If a driver loads pallets but leaves a six-inch gap between the cargo and the headboard without filling that void, the cargo can shift during a hard brake. That movement creates momentum, which can snap restraints. If the load can slide or tip, it’s unsecured, plain and simple.
Ignoring the “20% Rule” for Friction
Friction is a huge help when it comes to keeping cargo in place in a semi-truck, but you can’t rely on it alone. Unsecured cargo often happens when a driver assumes a heavy object won’t move just because it’s heavy.
The standard rule is that your securement system must withstand 0.8 g of deceleration in the forward direction. Generally, it’s assumed that friction provides about 0.2 g (or 20%) of that resistance, leaving the remaining 0.6 g to be handled by your tie-downs— so you’ll need to calculate the appropriate number and strength of tie-downs to account for that remaining force, or the cargo may shift or fall.
Keeping Your Fleet Compliant
Now that you know exactly what’s considered ‘unsecured cargo’ in a semi-truck, you can spot these issues during your next walk-around. It’s important to look beyond just “strapped down” and check the condition and method used. Taking a few extra minutes to double-check these details prevents expensive claims and keeps everyone on the road safer.
