1. Steel Fabrication Business: Ironworkers can start their own steel fabrication business, offering services such as welding, cutting, and assembly of steel components.

2. Architectural Metalwork Business: Ironworkers can offer services such as designing and constructing ornamental metalwork for buildings, including the fabrication and installation of staircases, balustrades, handrails, columns, and other structures.

3.Structural Steelwork Business: Ironworkers can offer structural steelwork services for large-scale projects such as bridges and commercial buildings, as well as smaller projects such as residential decks.

4. Pipefitting and Plumbing Business: With the expertise in working with metal pipes, an ironworker can start a pipefitting and plumbing business, offering services such as installing, maintaining, and repairing water pipes, gas lines, and other piping systems.

5. Ornamental Ironwork Business: Ironworkers can offer ornamental ironwork services such as constructing, repairing, and installing metal gates, fences, and other decorative pieces.