This STD provides clarification for 29 CFR 1910.219 - Mechanical power-transmission apparatus; Clarification of terms as it applies to power transmission belts, and guarding by location. Old STD number: STD 1-12.14 - Clarification of the Terms "Enclosed" and "Fully Enclosed", as applying to Power Transmission Belts. 

Additional resources and information can be found on the safety and health topic page for Machine Guarding.

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