OSHA servicing of multi-piece and single-piece rim wheels (29 CFR 1910.177 + charts)

• Source / publisher: US Department of Labor, Occupational Safety and Health Administration (osha.gov)
• Type: regulation explainer + guide (safety procedures, official wall charts)
• Topics: rim-wheel servicing hazards, training requirements, restraint devices (cages), deflate-before-demount rule, multi-piece rim matching, tube-type vs tubeless mounting procedures
• Vehicle scope: truck | trailer | bus | off-road machines (explicitly excludes car/LT sizes)
• Region: United States (universally cited as rim-safety best practice)
• Language: en (charts also issued in Spanish)
• Link: standard text: osha.gov ; chart booklet (3 charts incl. rim matching): osha.gov ; marine-terminals fact sheet OSHA3654: osha.gov
• License/access: public (US government publication)
• Notes: the canonical "why you cage a wheel" teaching source. Pair with employer-side industry guidance (e.g. tyre-association wheel-servicing bulletins) for a fuller module; AU/UK equivalents exist (state WHS rim safety codes) if regional variants are needed later.