Dry vans are the most common type of freight trailers hauled by commercial trucking companies. Van carriers move freight that is loaded into a semi trailer. Semi trailers are typically between 26 and 53 feet. A van can also refer to a box-shaped trailer or semi-trailer used to carry goods. Keruing or Apitong hardwoods are the most popular in dry van floors or interiors due to its hardness, low cost, and built in weatherproofing.