Heavy load lattice extension
6.3 Operation with the heavy load lattice extension
Lattice extension operating instructions 3 112 441 en 6 - 17
GMK 4100/4100-L/5095
11.01.2008
6.3 Operation with the heavy load lattice extension
H
When operating the lattice extension, the maximum speed for the different
power units is limited to 70%,
à Operating instructions of the truck crane.
The hoisting, lowering, slewing, derricking and telescoping movements are
carried out in the same way as when operating with the main boom. This
section only contains information that you will need for a rigged or folded
heavy load lattice extension.
6.3.1 Setting the SLI
Components that must be additionally entered on the SLI are the length and
the angle of the heavy load lattice extension
.
Setting the SLI à Entering the SLI code, p. 3 - 88.
The loads specified in the lifting capacity tables are reduced during opera-
tion with the heavy load lattice extension if:
– a hook block is reeved in on the main boom, or
– the swing-away lattice is folded to the side on the main boom.
The values which must be deducted from the load capacities depend on the
length of the swing-away lattice and the weight of the hook block. You will
find a table with the values in the
lifting capacity tables in the section Informa-
tion on working with the swing-away lattice extension
. The SLI switches off cor-
respondingly earlier.
6.3.2 Derricking the main boom
If the following prerequisites are met, raising and setting down the main
boom with a rigged heavy load lattice extension at a slewing range of 360°
is permitted and is monitored by the SLI.
s
G
Risk of accidents if the SLI is overridden
Do not override the SLI when lowering the boom into a horizontal position.
If the SLI is overridden, the crane operations will not be monitored and the
truck crane will overturn if you leave the permissible working range.
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