Aerial devices are among the most important pieces of equipment in a utility company’s fleet. They are another tool in the utility’s toolbox and – like any other tool – must be properly used and maintained.
While it's the responsibility of the employer to ensure that each individual operator is correctly trained and qualified to operate an aerial device, it takes the whole crew to contribute to safe and efficient operations. Following are three important steps crews should take before work starts on any project that requires use of an aerial device, plus real-world tips from Garry Christopherson, director of safety and security for Dairyland Power Cooperative in La Crosse, Wis.
Step 1: Conduct a site survey.
- Identify potential hazards, such as buildings, ditches, drop-offs, holes, debris, sewers, overhead obstructions, electrical conductors and underground utilities.
- Evaluate the ground conditions. The ground must be firm enough to bear the pressure produced by the bucket truck – including the maximum platform and jib loads – during operation. You may need to use pads under the outriggers to distribute the weight over a greater surface area. If your bucket truck does not have outriggers, or if it is equipped with only one set, make sure all the tires and axle suspension springs are equally loaded. If the ground is slippery, snowy or icy, consider how to prevent the vehicle from sliding.
- Consider the terrain. If the vehicle must be parked on a slope, keep the boom on the uphill side, chock the wheels and work off the rear of the truck. Per ANSI A92.2, bucket trucks are stability-tested on firm, flat surfaces up to a 5-degree slope. Never work on a slope greater than what is allowed by the manufacturer. Use your bucket truck’s chassis level indicator to make sure the truck is always set within the manufacturer’s operational limits. Most aerial truck manufacturers, including Terex, equip their vehicles with an inclinometer that is used to determine if the truck is set up within the allowable limits. Follow the instructions for your vehicle, and recognize that some trucks must be leveled before raising the booms.