Triple Main Hoist System
The triple main hoist system consists of three independent lower blocks on the main hoist position. This allows the Operator to upend heavy offshore structures such as monopoles and jackets with two hooks connected to one side, and one hook connected to the other side. The advantage is that once upended, two thirds of the crane’s capacity remains available to lift the upended structure, instead of half, commonly seen with the double main hoist system.
In addition, the triple main hoist system can be used to install large and voluminous structures, such as substations and platforms, very efficiently, since a set-up with three main hook blocks allows for less rigging to be used, simplifying operations and reducing required hook height for slings and lifting gear.