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The Operator must have both hands on the chainsaw, one on the controls and the other on the chainsaw hold bar that may also have an emergency stop control installed. The chainsaw operator must be aware of others around and not use the chainsaw if the area is not clear of other employees and the hands and limbs of other workers. When fueling a chainsaw the chainsaw must be shut down and cooled off before fueling. Ear protection might be required if the saw does not have an effective muffler device 5.1.16 Erecting Temporary Structure or Working from Aerial Lift Follow CB&I procedure CMS-710-02-PR-00700. Observe the following practices and procedures when erecting temporary structure or working from aerial lift: • Wear leather gloves while attaching support members to protect against pinching injuries. • While working from elevated levels greater than six feet, ensure that all employees have 100% fall protection with full body harnesses and guardrails. • Do not stand under loads that are being raised or lowered with cranes or aerial lifts. • Conduct pre-operational inspection of aerial lifts using CMS-710-02-FM-00701, including: - Check tire air pressure,hydraulic fuel level,and pressure. - Make sure pivot pins are secured. - Check hoses for worn areas. - Check for cracks or deviations in welded parts. - Check that the safety limit switch works freely. - Check the security of the guardrail system on the platform. - Check both ground and platform control functions. Raise and lower each boom system separately, listen for any unusual noises,vibrations, or uneven operations. • Maintain appropriate distance from overhead utilities: - Maintain at least 10 feet from overhead power lines, up to 50 kV. - For voltages over 50 kV, add 0.4 inches per kV to obtain the safe distance between equipment and power lines. - If voltage is unknown,remain at least 20 feet from overhead power lines. • Conduct site evaluation to determine proper positioning for the unit. Make sure surface is level. Cordon off holes,drop-offs, bumps or weak ground surfaces. • Never climb a raised platform or stand on the mid-rail or top-rail. • Tools should always be hung or put into a belt whenever possible. • Specific training must be obtained on the aerial lift to be used. 5.1.17 Confined Spaces Observe CMS-710-02-PR-01700:hi addition, observe the following confined spaces procedures and practices: 5-11