01 July 1997
Table 3-6. Advantages and underhung leaders.
Lighter and generally less expensive than
Cannot be used for side-to-side
extended type leader.
Requires only 2-drum crane.
Length of pile limited by boom length,
as this type of leader cannot extend
above the boom point.
Accurate in locating leader in vertical or
When long leaders require a long
fore and aft batter positions.
boom, working radius of crane is
reduced, which reduces the effective
capacity of the crane.
Rigid control of leader during positioning
Relatively short rigging time in setting up
and breaking down.
Utilize sheave lead in crane boom.