traybody

From tray +‎ body.

traybody (plural traybodies)

1. (Australia, automotive) The flat bed of a truck on which goods are loaded.
   • 2000, Bob Foster, Birdum or Bust!, Henley Beach, SA: Seaview Press, page 47:

     They were re-engined and modified as required, then had either turntables attached for semis or else traybodies fitted and some trailers tacked on.