Figure 12-48.-In-line approach with dragline.
6. Salvage pieces of hoist wire rope for use as the
dump rope.
PILE-DRIVING OPERATIONS
Pile driving in the NCF is done with crawler- or
truck-mounted cranes rigged with pile-driving
attachments, as shown in figure 12-49. The pile-driving
hammer is categorized under the 36-00000 USN
number registration series.
NOTE: The combined weight of all the
pile-driving attachments reduces the capacity of the
crane. Additionally, the crane capacity must be able to
support the combined weight of all of the pile-driving
attachments.
LEADS
Pile-driving leads serve as tracks along which the
pile-driving hammer runs and as guides for positioning
and steadying the pile during driving operations. The
leads come in 10-, 15-, and 20-foot sections bolted
together to form various lengths, as shown in figure
12-50.
NOTE: Because of the vibrations created during
pile-driving operations, you must check all the lead
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