The final step is is to weld the tabletop and the undershelf to the frame. You can grind down any welds that are protruding from the frame that will interfere with the top. Since the tabletop is slightly smaller that the width of the frame, there is a small valley that makes for easy welding. The expanded metal undershelf requires a small notch to be cut out from one corner to make room for the vertical support. The shelf, is tack welded to the frame every few inches (approximately every 7cm). If you are going to store welding gas or shielding gas on the shelf, you will need to weld on some extra pieces to ensure that the tank is properly stabilized. We welded an extra sheet of expanded metal to further support our gas tank. We also welded some extra pieces of square tube on top of the shelf to locate the bottom of the tank. In conjunction with a chain, the tank is very secure.