The invention relates to a system for erecting a building structure, the system comprising a foundation for receiving the building structure, and a plurality of inner and outer walls, roof and floor panels, the panels being adapted to engage each other for defining at least one story of the building structure, wherein the foundation comprises a first section and a second section, the first section being adapted to bear the load of the building structure and the second section being adapted to provide access to the interiors of the building structure.

The invention relates to a system for erecting a building structure, the system comprising a foundation for receiving the building structure, and a plurality of inner and outer walls, roof and floor panels, the panels being adapted to engage each other for defining at least one story of the building structure, wherein the foundation comprises a first section and a second section, the first section being adapted to bear the load of the building structure and the second section being adapted to provide access to the interiors of the building structure.

The present disclosure relates to a precast base. The precast base comprises a precast concrete body, a plurality of corrugated steel pipes, and a lifting part. The precast concrete body comprises a top surface, a bottom surface opposite to the top surface, and a plurality of mounting holes, each of which penetrates from the top surface to the bottom surface of the precast concrete body. The plurality of corrugated steel pipes are respectively embedded in the plurality of mounting holes. The lifting part is embedded in the top surface of the precast concrete body and is close to the center of the top surface.