Abstract: A tub support kit which can be dismantled and completely removed from the cargo tub of a wheeled vehicle such as a utility trailer or a pickup truck. The kit includes a frame structure which is adapted to rest upright at the rear end of the tub near a drop down tailgate. U-shaped support members extend out over the side walls of the tub and have their rear legs separably connected to the frame structure. Two berth bases overlie the support members and are releasably connected to the U-shaped support members and the frame structure to hold the assemblage together.