Fatalities and Liability in a Defective Trailer Underride Guard Lawsuit
Because the deck of a commercial semi-trailer sits significantly higher than the hood of a standard passenger car, rear-end collisions with trucks pose a unique and horrifying risk. Without structural protection, a smaller vehicle will slide entirely underneath the trailer—a catastrophic event known as an underride crash.
To prevent passenger compartment intrusion (PCI) and decapitations, federal law mandates the installation of heavy steel rear impact guards. When these structures fail upon impact, families of the victims can pursue a defective trailer underride guard lawsuit to hold the trucking company and the trailer manufacturer accountable.
The Federal Motor Carrier Safety Regulations (FMCSR) dictate strict dimensional and structural requirements for rear impact guards (often called DOT bumpers). The guard must sit no higher than 22 inches off the ground and be engineered to withstand immense kinetic force without shearing off or bending under the trailer.
Why Underride Guards Fail
Underride guards are designed to save lives, but they are frequently compromised by corporate neglect or poor engineering:
Trailers are exposed to harsh winter road salts. If a trucking company fails to inspect and replace a deeply rusted underride guard, the weakened metal will instantly shear off the chassis during a collision.
Drivers frequently back into loading docks too hard, bending the vertical supports of the guard. A guard that has already been structurally compromised will provide zero resistance in a subsequent highway crash.
Some older trailers have guards with weak attachment points that meet outdated federal minimums but fail modern crash tests. Your attorney may file a product liability claim directly against the trailer manufacturer for failing to utilize safer, reinforced designs.
Preserving the Wreckage
Time is critical in an underride case. The trucking company will attempt to scrap the trailer or repair the broken guard immediately. Your legal team must file a temporary restraining order (TRO) to preserve the trailer so metallurgical experts can analyze the sheared bolts and rusted welds, proving the company's fatal negligence.