Cutting container walls safely: tools, sequence and reinforcement

Cutting is the most powerful change you make to a container. Done well, it creates bright, usable openings. Done badly, it weakens the whole box.

Plan before you cut

Mark every opening on the steel and check it against the drawings. Confirm the position with the engineer if one is needed.

Tools

Plasma cutters and angle grinders with cutting discs are common. Use the right ventilation and eye protection, and keep a fire extinguisher nearby.

Sequence

1. Drill pilot holes at the corners of each opening.
2. Cut the openings, starting from the corners.
3. Remove the steel carefully, keeping the panel for reuse if possible.
4. Weld the reinforcement frame around each opening.

Safety

Ground the work, check for residues before you start, and work with a second person.

Read the guide to cutting openings for the design details, and check the layout in the UnedPod configurator first.