Where exposure to machinery and equipment hazards cannot be eliminated or substituted for machinery and equipment of improved design, risk controls must be applied to the hazards to prevent or reduce the risk (chance) of injury or harm.
• Guarding may also serve to mute noise emissions through application of sound absorbing materials. Other emissions, such as lasers, ultraviolet light, bright light or welding flash, can also be safely screened to prevent potential harmful exposure.
People providing cleaning services could: • work alone • access machinery and equipment from the rear or sides, or in unexpected ways • climb on machinery and equipment • enter confined spaces, or larger machinery and equipment • become trapped by the mechanism of the machinery and equipment through poor isolation of energy sources or stored energy, such as spring-loaded or counter-balance mechanisms, compressed air or fluids, or parts held in position by hydraulics or pneumatic (air) rams • work with chemicals • operate electrical equipment in wet areas.
Interlock guarding is generally achieved via mechanical or electrical means, but may also include hydraulic or pneumatic control systems. The energy stored in moving parts (momentum) can cause the mechanism of the machinery or equipment to run on for some time after the source of driving energy has been removed.
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