The frame provides the main structure and support for the entire trolley. It is commonly made of materials such as steel. The frame includes vertical and horizontal beams that enhance stability and durability.
*Manufacturing process: The main axes of the frame are made from square steel tubes. These tubes are processed using automated pipe-cutting machines to achieve the desired sizes. They are then shaped using CNC tube bending machines. Additionally, horizontal bars are made from thick flat steel bars and connected to the main axes using bolts.

The grid deck is a component located beneath the trolley and serves as a platform for storing goods. It is securely attached to the frame.
*Manufacturing process: Grid panels are cut and shaped according to the required dimensions. They are then welded to the square steel tubes of the frame using robotic welding.