The present invention provides a truck bed system with a plurality of powered actuators which can raise a raisable platform above the truck bed floor to create a second platform in addition to the truck bed floor surface. The additional or second truck bed platform allows the truck user to use the upper platform for carrying tools and other goods or materials, with the space between the truck bed floor and platform for storing or moving large flat items like lumber and plywood or drywall sheets without displacing or disturbing the contents stowed on the upper platform. The present invention also allows the upper platform to be used for stowing large items like lumber and plywood or drywall sheets, with the space between the truck bed floor and upper platform for carrying tools and other goods or materials. The present invention allows the space between the truck bed floor and the upper platform, when in a raised position, to be used as secure storage when the tailgate is locked. The plurality of actuators can be attached to the truck bed floor, the truck bed walls or integrated into the space within the truck bed side walls.

A structure for a substructure includes a body, and an openable roof. The roof is displaceable at its edges along two longitudinal beams of the body. In a closed state, the roof closes a roof opening between the two longitudinal beams. In an opened state, the roof predominantly exposes the roof opening between the two longitudinal beams. Each longitudinal beam is supported in a height-adjustable manner relative to the substructure via at least one lifting assembly. The body is adjustable at least in height relative to the substructure depending on a height adjustment of the lifting assembly. At least one lifting drive is provided which displaces the body together with the roof in height relative to the substructure. The lifting drive applies a force in the substructure for compressing a load protruding beyond the substructure by lowering the body with the closed roof onto the substructure against the protruding load.