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45
fi g. 3.8
fi g. 3.9
fi g. 3.10
3 - B
RIDGES
C = Cantilever setting
Link plate cantilever
setting
Cantilever Bridge
Bridge Setups
Installation (cont’d)
WARNING
In a cantilever confi guration, it is important to install each bridge alternately
on one side, then on the other side of the motorized unit to avoid throwing
the structure out of balance. The number of bridges should be equal on both
sides of a cantilever installation.
2-
Raise the motorized unit by two mast rungs above base level. Refer to p. 65 of the
Power
Pack and Operating Components
section for instructions on how to raise a motorized
unit.
3-
Using a rough terrain forklift or a crane, lift the bridge by the forklift tubes (fi g. 1.4,
p. 9) and align the top and bottom parts with the bridge or the motorized unit it must be
attached to, according to the layout. For the installation of 10' (3 m) and 5' (1,5 m)
modular bridges, make sure that the dedicated wall side (with outrigger pockets) is
turned towards the face of the work (fi g. 3.1, p. 43).
4-
Assemble the top part of the bridge to the other bridge or to the motorized unit using
four 1" x 2" long (
GR5
) bolt and nut assemblies through the
four
outer assembly
sockets
(fi g. 3.6, p. 44) in the front and back.
Do not tighten the bolt and nut assemblies
yet
.
5-
Attach the bottom part of the bridge to the other bridge or to the motorized unit using
link plates and pins sets (4) at the cantilever setting ("C" on fi g. 3.8).
6-
Tighten the nut and bolt assemblies
(4) at the top of the bridge to 100 lb-ft (136 N-m)
of torque and install the appropriate guardrails. Refer to p. 91 of the
Accessories
section for more information on the installation and use of guardrails.
7-
Repeat steps 3 to 6 to attach a second bridge assembly on the other side of the
motorized
unit.
8-
Install as many additional bridges as required and allowed. It is important to install
each
bridge
alternately
on one side, then on the other side of the unit, to avoid throwing
the structure out of balance. The number of bridges should be
equal on both sides
of a cantilever installation. Refer to the
Load Capacities
section on p. 80 for information
on the number of bridges allowed in a cantilever bridge confi guration.
9-
If required, install optional cantilever outrigger supports. For more information about
the installation and use of a cantilever outrigger support, refer to p. 100 of the
Accessories
section.