Abstract: The invention generally concerns a semi-trailer to be trailed by a tractor. The semi-trailer comprises a wheeled deck having two lateral sides, proximate and distal longitudinal end sides. The semi-trailer also comprises two wall structures so pivotably mounted to the deck along a respective lateral side thereof as to be movable between an upright position, where the semi-trailer is in a dry-box configuration, and a lay down position wherein the semi-trailer is in a flatbed configuration. The two pivotable wall structures allow the semi-trailer to be moved between the dry-box configuration and the flatbed configuration.

Abstract: The invention generally concerns a semi-trailer to be trailed by a tractor. The semi-trailer comprises a wheeled deck having two lateral sides, proximate and distal longitudinal end sides. The semi-trailer also comprises two wall structures so pivotably mounted to the deck along a respective lateral side thereof as to be movable between an upright position, where the semi-trailer is in a dry-box configuration, and a lay down position wherein the semi-trailer is in a flatbed configuration. The two pivotable wall structures allow the semi-trailer to be moved between the dry-box configuration and the flatbed configuration.