Workplace safety law does not work the way people assume, and the gap between assumption and reality is where workers get hurt and employers get cited. This article explains what the statute actually requires, why the general duty clause reaches hazards no standard covers, and how a complaint becomes an inspection and an inspection becomes a citation. It walks through the classification scheme that determines penalty exposure, the abatement obligation that outlasts the fine, and the short contest window that most employers miss. Separate sections cover the anti-retaliation protection with its unusually short deadline, the narrow circumstances in which a worker may lawfully refuse dangerous work, and the multi-employer worksite rules that reach contractors who do not employ the exposed worker. Practical sections explain what to document before an incident, what to do during an inspection, and the five hazards that generate most serious injuries. Worked examples run throughout and every authority is linked to its text.