30
1 - M
OTORIZED
U
NIT
Setup and confi gurations
Multiple units confi guration with mast ties – pre-installation
(requires the use of two bearing bridge adapters – sold separately)
The following installation steps can be used for a
non-standard confi guration
requiring additional equipment but no accessories other than a hoist
. Refer
to fi g. 1.27, fi g. 1.28 and fi g. 1.29 on p. 22, for details about the restrictions
and allowances for a confi guration. Refer also to p. 17 of this section for more
information about standard and non standard confi gurations.
C
Positioning the fi rst motorized unit
1-
Prepare
the
fi rst motorized unit and the area where the setup will be installed as
described in the general guidelines on p. 18 (steps 1 through 15). Make sure that all base
outriggers are completely closed.
Positioning the second motorized unit
2-
Determine the position of the second motorized unit while making sure that the ideal
distance is kept between the two motorized units. Refer to the installation instructions
for a bearing bridge structure, on p. 46 of the
Bridges
section.
3-
Prepare the second motorized unit and the area where it will be installed as described
in the general guidelines on p. 18 (steps 1 through 15).
It is important to note that cantilever bridges must not be installed until all tie
levels are in place.
Installation of the bearing bridge structure
4-
Proceed with the installation of the bearing bridge structure. Refer to steps 1 through
12
only
of the installation instructions for a bearing bridge structure on p. 46 of the
Bridges
section. Cantilever bridges
must not be installed at this point
. It is important
to note that
loads cannot be applied on bridges during pre-installation
.
Installation of the hoist
5-
If required and allowed, install the hoist(s). It is important to note that during
pre-installation, any hoist installed can be used
only
to handle mast sections and
cannot be used above the last tie level installed. For information on the installation
and use of the hoist, refer to p. 103 of the
Accessories
section.
Verifi cation of the setup
6-
Make
a
fi nal verifi cation of the setup before starting to install mast sections. Make
sure all the guardrails are in place and secure (see p. 91 of the
Accessories
section
for more information about guardrails). In all cases where workers are exposed to fall
hazards greater than specifi ed by local regulations, the installation of guardrails or
face guardrail supports is
mandatory
.
Installation of mast sections and mast ties
7-
Using a crane or a rough terrain forklift, load mast sections on the units.
Mast
sections should be stored horizontally and distributed equally on each motorized
unit to ensure good balance
. Refer to the
Load Capacities
section on p. 80 for
more information about loading the units.
8-
Install mast sections until a fi rst tie level is required. Refer to p. 69 of the
Mast and
Mast
Ties
section for instructions on how to install mast sections. It is important to
install mast sections alternately – on the fi rst motorized unit, then on the second, to
ensure good balance. For more information about the schedule of installation of tie
levels, refer to the
Mast Tie Schedule
table on p. 70 of the
Masts and Mast Ties
section. Refer to p. 70 of the
Masts and Mast Ties
section for instructions on how
to install mast ties.
