Because materials used in metal working are heavy and bulky, metal workers must be in good physical condition. They also need good agility, balance, eyesight, and depth perception to safely work at great heights on narrow beams and girders. Metal workers should not be afraid of heights or suffer from dizziness. Apprentices also study the care and safe use of tools and materials. On the job, apprentices work in all aspects of the trade, such as unloading and storing materials at the job site, rigging materials for movement by crane or derrick, connecting structural steel, and welding.
Some metal workers learn the trade informally on the job without completing an apprenticeship.
These workers generally do not receive classroom training, although some large contractors have extensive training programs. With experience, trainees perform more difficult tasks like cutting and fitting different parts. Learning through work experience alone may not provide training as complete as an apprenticeship program, however, and usually takes longer. Some experienced workers become supervisors. Others may go into the contracting business for themselves.