Abstract: An improved trailer chassis assembly primarily constructed from extruded components including an extruded chassis rail component, a cross member component and a connector component. The component has a wall surface defining an interior channel and an opening in the wall surface extending through the wall surface to the interior channel. The connector component has a first region adapted to engage with the interior space of the chassis rail component, and a second region adapted to engage with the cross member component. The interior space of the chassis rail component is adapted to capture movement of the first region of the connector component in vertical and horizontal planes, and yields movement in the axial plane.

Abstract: Certain aspects of the present disclosure provide a trailer, including: a chassis and a plurality of positioning assemblies, each positioning assembly including a positioning arm configured to move between a first position in which the chassis is in a lowered position and a second position in which chassis is in a raised position.