Abstract: A height adjustable shipping container usable as a building structure. The container having vertical corner columns and at least three side walls which may be transported at a reduced height as a shipping container and expanded at the receiving end. At least some of the vertical corner columns expand in length during expansion of the reduced height shipping container. The shipping container is able to transport therein structural components, such as wall, panel, roof and even fittings to build a building structure that is the equivalent in floor area to that of at least two shipping containers.

Abstract: A preformed formwork for forming concrete floor slab for a height adjustable shipping container building structure having spaced apart frame side beams, spaced apart end beams and fork lifting supports. Reinforcing is situated within the internal area of the frame and attached to the side and end beams. A wall receiving feature on the external surface of the side and end beams accommodates attaching a portion of wall panel to the end and side beams. Columns are supported at the corners of the frame. The preformed formwork is dimensioned to equal the floor area of a shipping container so the preformed formwork is able to be easily transported within a height adjustable shipping container containing building components and able to be readily and easily erected and assembled as ether a ground floor or upper level floor of a building structure prior to been formed in to a concrete slab.