Two-stage swing-away lattice extension 3.6 Description of rigging work
• Lower the lattice extension with the retaining mandrel out of the holder on the main boom.
• Swing the lattice extension until it is no longer above the run-up rail. • Carefully lower the lattice extension from the control unit on the foot of the 12.5 m (41 ft) section until it starts to swing out. If a helper is holding the guide rope, he can now swing the lattice extension in front of the main boom head. If you are alone and have attached the guide rope to the crane when securing, the lattice extension now swings only until the guide rope is tight. You can now swing the lattice extension with the guide rope in front of the main boom head.
Swinging the 9 m (30 ft) section in front of the 12.5 m (41 ft) section
The swinging procedure during rigging is described below. Proceed in the opposite order for unrigging.
Before you swing the 9 m (30 ft) section in front of the 12.5 m (41 ft) section to rig the 22 m (72 ft) two-stage swing-away lattice extension, the 12.5 m p. 3 - 53. (41 ft) section must be locked in front of the main boom head;
à
• Disconnect the connection between the 9 m (30 ft) section and the 12.5 m (41 ft) section;
à Connections in the middle area, p. 3 - 46.
• Swing the 9 m (30 ft) section on the guide rope in front of the head of the 12.5 m (41 ft) section.
04.08.2004
• Proceed in the opposite order for unrigging.
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Operating instructions lattice extension GMK 5200/6220-L
