- 1). Set the 3-foot square piece of steel on a flat surface on the ground. Then, line up the four 2-by-3 sections of steel along the edges of the 3-foot piece, with one section along each edge of the 3-foot piece.
- 2). Weld the edges of the steel sections to the edges of the square piece to form an open square box that is 2 feet deep and 3 feet wide and tall. Allow the welding to cool for several hours.
- 3). Drill two holes on the bottom of the left and right sides of the steel box to make holes for the wheels. Run the handheld drill at the slowest speed to avoid dulling the bit or overheating the drill.
- 4). Bolt the wheels into the outside of the box using the steel bolt, washer and nut and the holes you drilled in Step 3.
- 5). Hold each of the cylindrical pieces of steel against one of the sides of the metal box you made in previous steps, parallel to wheels. The cylindrical pieces should be about halfway up the height of the box's steel sides. They should also be placed halfway along the length of the box's steel sides, so that 1 foot of each cylindrical piece sticks out beyond the box's length (that way, the cylindrical pieces can be held as handles).
- 6). Weld the handles into place in the position in which you placed them in Step 5. Allow the welding to cool for several hours.
Source...