Search for OSHA racking regulations and most results imply there is a rule written specifically for pallet rack. There is not. When a rack system gets cited, it happens under 29 CFR 1910.176(b), which requires stored material to be stacked and secured against collapse, or under 1910.176(a), which requires safe clearance in aisles and passageways where mechanical handling equipment operates. Both live inside Subpart N, the materials handling and storage section, and neither one mentions uprights, beams, or anchors by name.
That gap gets filled two ways. Inspectors apply the General Duty Clause when a hazard is obvious but no specific standard covers it, and they lean on the engineering standards the industry already uses, primarily ANSI MH16.1 for rack design and the International Building Code for structural and seismic requirements.
Practical OSHA warehouse installation requirements therefore come from a stack of documents rather than a single rulebook, which is why so much online compliance content gets the details wrong. Installers who work across jurisdictions learn quickly that local permitting offices and fire marshals often apply those standards more aggressively than OSHA does.