Keruing is the common name for the hardwood coming from the Apitong tree (Dipterocarpus), it is considered the most popular hardwood for trailer decking applications in the transportation industry, used in vehicle decks on semi-trailer trucks, rail cars, flatbed trucks, and many others. Its popularity comes from its durability light weight, and low cost. Keruing is almost twice as hard as oak in the Janka hardness test.