What Qualifies as Unsafe Design Under Louisiana Law
Louisiana governs product liability claims through the Louisiana Products Liability Act (LPLA), found at La. R.S. 9:2800.51 through 9:2800.59. The LPLA is the exclusive remedy for injuries caused by defective products in Louisiana. It replaces general negligence theories that other states may allow.
Under the LPLA, a product has an unreasonably dangerous design when a feasible alternative design existed at the time of manufacture. The alternative design must have been capable of preventing the claimant’s damage. Louisiana does not use the consumer expectation test that some other states apply to design defect claims. Instead, the LPLA requires a risk utility analysis defined by statute.
A design defect claim targets the product itself, not a single flawed unit. Every unit produced according to the design carries the same risk. This makes design defect cases distinct from claims about isolated errors during production. If the design is unreasonably dangerous, every product built to that specification is defective.
Elements of a Design Defect Claim
La. R.S. 9:2800.56 sets out three factors that a court must weigh to determine whether a product’s design is unreasonably dangerous. All three factors apply in every design defect case filed in Louisiana.
First, the claimant must show that an alternative design existed at the time of manufacture. The alternative must have been capable of preventing the damage that occurred. General assertions that the product could have been safer are not enough. The claimant must identify a specific, practical alternative.
Second, the court weighs the likelihood that the product’s design would cause the type of damage the claimant suffered. This includes the severity of that damage. A product that presents a small risk of minor injury receives different treatment than one that creates a foreseeable risk of serious harm or death.
Third, the court considers the burden on the manufacturer of adopting the alternative design. This includes whether the alternative would have an adverse effect on the product’s utility. A redesign that eliminates a hazard but also eliminates the product’s core function does not satisfy this analysis.
Expert testimony is critical in design defect litigation. Louisiana courts routinely require qualified engineers, product designers, or industry specialists to explain how the alternative design would have worked and why it would have prevented the injury. Without expert support, most design defect claims do not survive summary judgment.
Design Defect vs. Manufacturing Defect
The LPLA treats design defects and manufacturing defects as separate categories with different proof requirements. Understanding the distinction matters because it determines how the case is built and what evidence is needed.
A manufacturing defect occurs when a single product deviates from the manufacturer’s own specifications. The design is acceptable. The problem is that one unit was not made correctly. A cracked weld on a single ladder, a missing bolt in one car’s steering assembly, or contamination in one batch of medication are manufacturing defect examples. The product’s own blueprints serve as the standard.
A design defect exists when the product was manufactured exactly as intended, but the design itself creates an unreasonable risk of harm. Every unit shares the same flaw because the flaw is in the plan, not the execution. A vehicle roof that collapses on impact because it lacks adequate reinforcement is a design defect, even if every unit was built precisely to specification.
The practical difference affects trial strategy. Manufacturing defect cases compare the actual product to the manufacturer’s design documents. Design defect cases require the claimant to propose and prove a feasible alternative that the manufacturer did not adopt. This requirement under La. R.S. 9:2800.56 makes design defect cases more complex and more dependent on expert analysis.
Common Unsafe Design Cases
Certain categories of products generate design defect litigation more frequently than others. These cases share a common pattern: the manufacturer chose a design that prioritized cost, aesthetics, or production speed over user safety when a practical alternative existed.
Vehicle design defects include roofs that crush during rollovers, fuel systems positioned where rear impacts cause fires, seat structures that collapse rearward onto child passengers, and electronic stability systems that fail to activate. Automakers possess extensive crash test data during the design phase. When internal data shows a known risk and the manufacturer proceeds without redesign, that evidence becomes central to a design defect claim.
Industrial and construction equipment cases involve machinery without adequate guarding, emergency shutoff failures, and hydraulic systems that lack pressure relief mechanisms. Workers in Shreveport and across Caddo Parish operate heavy machinery in oil and gas, timber, and manufacturing settings. Equipment that reaches the market without basic safety guards may be unreasonably dangerous under the LPLA.
Consumer products with design defects include children’s furniture that tips over without anchoring provisions, power tools without blade guards, and medical devices that fail under normal physiological conditions. Household appliances with electrical designs that create fire hazards also fall into this category. In each case, the question under Louisiana law is whether a feasible alternative design would have prevented the harm.
Filing Deadlines and Comparative Fault
The LPLA has its own prescriptive period. La. R.S. 9:2800.58 sets a one year deadline from the date of injury to file a design defect claim. This is shorter than the general personal injury prescriptive period that now applies to certain other tort claims. Missing this deadline extinguishes the claim entirely. Louisiana courts enforce prescriptive periods strictly and do not grant extensions based on the severity of the injury.
Louisiana also imposes a peremptive period on LPLA claims. La. R.S. 9:2800.56 includes a requirement that the alternative design must have existed at the time of manufacture. Additionally, no LPLA claim may be brought more than one year after the date of injury regardless of when the defect is discovered, absent specific exceptions for long latency injuries.
Comparative fault applies to LPLA claims. For injuries occurring on or after January 1, 2026, Louisiana’s modified comparative fault system bars recovery if the claimant is 51 percent or more at fault. This means a manufacturer defending a design defect claim will argue that the injured person misused the product or ignored warnings. If the jury assigns 51 percent or more fault to the claimant, the claimant recovers nothing. For injuries before that date, Louisiana’s pure comparative fault system applied, reducing damages by the claimant’s percentage of fault without a complete bar.
Multiple parties may share liability in a design defect case. The manufacturer, distributor, and retailer can all be named as defendants under the LPLA. Louisiana law allows the injured person to bring claims against any party in the chain of commerce who placed the product into the stream of trade. Each defendant’s percentage of fault is determined separately by the fact finder.