Figure 4-42 shows examples of a lifting strap and a chain. For a detailed explanation of uses, strengths, and various types of lifting straps and slings, refer back to chapter 3.
A snatch block (fig. 4-43) is a single sheave block made so that the shell opens on the side at the base of the hook to permit a rope or line to be slipped over a sheave without threading the end of it through the block. Snatch blocks ordinarily are used when it is necessary to change the direction of the pull on a line.
Handline While working on a power pole, every lineman should carry a handline. It can be used for lifting or lowering smaller objects and also for holding transformers and other equipment away from the pole as it is being raised. The handline is usually made of 1/2-inch manila rope, approximately 30 to 35 feet long, and has a manufactured or self-made metal hook attached to one end. The handline is personal equipment and can be configured to best suit the individual or the job to be accomplished.
The pulley line, as shown in figure 4-44, is another lifting tool and is used to replace the handline when large quantities of material must be lifted to the top of the pole. When the pulley line is used in this way, the lineman can continue working, while the materials are being supplied by the groundman.
Figure 4-42. - Lifting strap and chain.
Figure 4-43. - Top dead-end snatch block.
Another manual lifting device is the pole jack, as shown in figure 4-45. It is designed for easy attachment and removal from the pole and provides an unpowered mechanical lift that is used to straighten or remove power poles.
Figure 4-44. - Pulley line.Continue Reading