There are many different types of decking that can be used for a trailer, and the best type to use will depend on the specific application. For example, if the trailer will be used for hauling heavy machinery or equipment, then a stronger and more durable decking material such as steel or aluminum would be ideal. However, if the trailer will be used for lighter applications such as carrying recreational vehicles or boats, then a lighter weight decking material such as wood or composite would be a better choice. Ultimately, it is important to consider the intended use of the trailer when deciding what type of decking to use.