- 1). Draw the dimensions of the sheet metal box on your sheet metal using a ruler and permanent marker. The size will vary depending on the intended purpose of the box. Typically you will want six panels in total, with two of them longer, to create a rectangular box.
- 2). Place your steel sheet on top of two sawhorses. Cut along each line with your cutting torch then smooth the edges with an electric grinder. Now you should have six separate pieces.
- 3). Put two pieces together at a time using a square measure to ensure they are perpendicular. Using a clamp to hold them in place, weld them together on both sides of the edge. Repeat for each piece of metal except for the lid. Allow 30 minutes to cool.
- 4). Drill four small holes in one edge of the lid and attach the hinges. Attach the hinges to one side of the box. Drill two more holes in the side of the box and opposite edge of the lid and install a latch.
- 5). Test the strength of your box and re-weld any sides that need it. You can use it to store anything you like.
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