21
1 - M
OTORIZED
U
NIT
Setup and confi gurations
Installation of a multiple units confi guration – freestanding
(requires the use of two bearing bridge adapters – sold separately)
Positioning the second motorized unit (cont’d)
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). Make sure that the base outriggers
on
the
back
of the motorized unit are completely extended and the base outriggers
on
the
front
of the unit are extended to the appropriate distance, as described in step
4 of the general guidelines and in fi g. 1.25, p. 19. Make sure all base outriggers
are properly locked in place.
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
.
7-
Before authorizing workers to use the motorized units, perform every step in the daily
inspection checklist. If required, fi ll out the handover sheet to complete the installation.
Refer to p. 120 of the
Transport, Storage and Maintenance
section for more information
about the daily inspection checklist and to p. 124 for information about the handover
sheet.
Installation of the bearing bridge structure and the cantilever bridges
4-
Proceed with the installation of the bearing bridge structure and the cantilever bridges.
Refer to p. 46 of the
Bridges
section for more information on the installation of a
bearing bridge. It is
mandatory
to install any additional cantilever bridge
after
the
bearing bridge structure has been installed to avoid throwing the structure off balance.
5-
Adjust the outriggers and install planks, as required and allowed (see p. 95 of the
Accessories
section for more information).
Installation of outriggers and planking
WARNING
On freestanding installations, with the front base outriggers completely
extended, the
maximum width
of planking allowed in
front
of the unit is a
three-plank
wide confi guration.
Installation of mast sections
8-
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.
9-
Proceed with the installation of mast sections. Refer to p. 69 of the
Masts and Mast
Ties
section for instructions on how to install mast sections.
10-
Install as many mast sections as required on each motorized unit until the setup
has reached the desired height, equal or inferior to the maximum allowable height for
a freestanding installation, making sure throughout the process that each mast remains
plumb on both its front and side axis. It is important to install mast sections alternately
– on the fi rst motorized unit, then on the second, to ensure good balance. Refer to
p. 21 of the
Masts and Mast Ties
section for more details on the maximum allowable
height for a freestanding installation.
11-
It is important to make sure to verify the mast bolts on each mast when lowering the
platform to make sure they are tightened to the proper torque and are in good
condition, especially on
brand
-
new mast sections
, as the galvanized coating
may have compressed. In all cases, mast bolts must be tightened to a torque of
120 lb-ft (163 N-m). Failure to tighten bolts properly may lead to serious injury or
death.
