The present invention relates to a chassis (10) for a vehicle comprising a plurality of sandwich plate elements (100) and a plurality of connection elements (200, 200′, 200a-c) for connecting said plurality of sandwich plate elements (100). Each connection element (200, 200′, 200a-c) comprises two or more recesses (210, 220) configured to receive an edge portion (160) of one of the plurality of sandwich plate elements (100). The plurality of connection elements (200, 200′, 200a-c) comprises at least one connection element (200′, 200a-c) which has at least one external surface (202a-e) provided with a connection configuration (250a-e) for a mortise and tenon type joint. A method (20) for forming a chassis (10) for a vehicle is also provided.