25
1 - M
OTORIZED
U
NIT
Setup and confi gurations
Multiple units confi guration with mast ties – progressive installation
(requires the use of two bearing bridge adapters – sold separately)
1-
Prepare the 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 motorized unit
Installation of bridges and accessories
2-
With the motorized unit at base level, install as many bridges as is required and
allowed. For instructions on how to install a bridge, refer to p. 43 of the
Bridges
section.
Refer to the
Load Capacities
section on p. 80 for the maximum number of bridges
allowed in a setup. It is important to note that
loads cannot be applied on bridges
during
pre-installation
.
3-
If required and allowed, install the hoist. It is important to note that during
pre-installation, the hoist 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.
Single unit confi guration with mast ties – pre-installation
The following installation steps can be used for a
standard confi guration
. The
following steps also apply to
a
non-standard confi guration equipped with
accessories but not requiring additional equipment
. 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.
B
WARNING
During pre-installation, only mast sections can be loaded on the motorized
unit. It is important to note that no loads are allowed on the bridges until the
pre-installation process is complete.
A
Installation of mast sections and tie levels (cont'd)
10-
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.
11-
Install as many mast sections as the plan layout requires and as is allowed. A setup
with mast ties should not be raised above 250' (76 m). Make sure throughout the
process that each mast remains plumb on both its front and side axis and that tie levels
are installed when required.
12-
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.
To access the work platform by climbing up the mast once the setup has been
raised over 10' (3 m) above base level, it is recommended to use the access
ladder on the walkway. It is also suggested to install a retractable rest platform
when the setup is at a height over 30' (9 m) above base level or beyond the
maximum allowable height prescribed by local regulations for mast climbing
without a rest platform.
