31.E 07 Power saws.
- When used by a climber aloft, chainsaws weighing more than 15 lbs (6.8 kg) must be supported by a separate line crotched in the tree. Where there are no lateral branches on which to crotch a separate support line, a false crotch must be used.
Be sure chainsaws are energized when walking or climbing.
- Use of hydraulic or electric power saws is permissible. Corded electrical power saws or other corded electric tools must not be used in the vicinity of overhead power lines.
- The engine must be started and operated only when all co-workers are clear of the saw and then in accordance with the manufacturer's recommendations and instructions.
- The operator will shut off the saw when carrying it over slippery surfaces, through heavy brush, and when adjacent to personnel. The saw may be carried running (idle speed with the brake set) for short distances (less than 50 ft (15.2 m)) as long as it is carried to prevent contact with the chain or muffler.
- All saws must be equipped with a clutch, chain brake (gas only), throttle trigger latch, stop switch, rear hand guard, chain catcher, vibration damper, spark arrestor, and muffler.
- Chainsaw chains must be kept sharp and properly adjusted.
- Chainsaws must be operated per Section 13.F.
- Additional PPE for chainsaw use includes chaps, safety boots, and hearing protection. Hearing protection may not be needed on hydraulic saws.
- Gas-powered chainsaws must be equipped with a control that will return the saw to idling speed when released.
- A chainsaw must not be left running while a climber is ascending, descending or moving any considerable lateral distance in the tree.
Knowledge Check Choose the best answer for the question.
31-11. When used by a climber aloft, chainsaws weighing more than _____ must be supported by a separate line crotched in the tree.
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