Swing-away lattice 4.4 Description of rigging work

Connections in the Middle area

The connections in the Middle area consist of a locking bar with two pins. Depending on the position of the locking bar, different sections are connected with one another. There are three positions:

–Position Section1/section2

–Position Section2/main boom

–Position At section1

Position Section1/section2

This position must be established in the following circumstances:

–When rigging the 18 m (59 ft) swing-away lattice – before the swing-away lattice is swung in front of the main boom head

–When unrigging the 18 m (59 ft) swing-away lattice – after section2 has been swung towards section1.

–When unrigging the 11 m (36ft) swing-away lattice – if section2 is fitted to the main boom.

–When removing the 18 m (59 ft) swing-away lattice

• Fasten the locking bar (1) to section2 with the pin (2).

• Fasten the locking bar (1) to section2 with the pin (3).

• Secure the pins using the retaining pins.

Establishing the position of section2/ mainboom

This position must be established in the following circumstances:

–when unrigging the 11 m (36ft) swing-away lattice – if section2 is fitted.

–before removing – when only section1 is to be removed.

• Fasten the locking bar (1) to the main boom with the pin (2).

• Fasten the locking bar (1) to section2 with the pin (3).

• Secure the pins using the retaining pins.

Releasing the position of section2/ mainboom

This position must be released if only section2 is to be installed and removed.

• Sling section2;à p.3-6.

• (A) – Pull out the pin (2).

• (B) – Fold down the locking bar (1).

• Insert the pin (2) into the locking bar (1).

• Secure the pin (2) using the retaining pin.

Position at section1

This position must be established in the following circumstances:

–when rigging the 18 m (59 ft) swing-away lattice – before section2 is swung in front of section1.

• Fasten the locking bar (1) to section1 with the pins (2) and (3).

• Secure the pins using the retaining pins.