Industry is a very difficult to categorize and generalize as there are many very specialized processes that have their own needs. Industrial trench drains are used to capture fluids used to cool machinery, capture wash water from washing equipment and products, capture wash water, capture and treat chemicals used in various processes, contain spills, run wires and pipes to machinery, and any number of other uses.
Most industry these days is tightly regulated and it is no longer allowed to dump waste down the drain. Manufacturers are therefore looking to capture any fluids that are used and recycle the fluid. Often times some sort of filtration and/or separation is required.
Trench drains are also advantageous because it allows for flatter floors. This allows materials to be stacked higher, equipment to sit level, and makes for a less dangerous work environment.
Trench drains in industrial/manufacturing environments can see heavy loads or none at all, harsh chemicals or only water, large quantities of debris or none at all, abrasive materials, flammable materials, and many other damaging conditions. All these conditions need to be carefully weighed to determine what type is best for an application. These applications are good places to call in an expert to carefully evaluate the situation and give their best recommendation.