34
1 - M
OTORIZED
U
NIT
Dismantling a single unit installation with mast ties
Dismantling a standard multiple units installation – with mast ties
Setup and confi gurations
Dismantling an installation
A
B
6-
Lower the motorized unit to base level, removing all mast sections and mast ties on
the way down. Refer to p. 75 of the
Masts and Mast Ties
section for instructions on how
to remove and transport mast sections. Refer to p. 75 of the
Masts and Mast Ties
section for instructions on how to remove mast ties.
Mast sections should be stored
horizontally and distributed equally on the motorized unit to ensure good
balance
.
7-
Make sure to avoid overloading the motorized unit. On higher installations, it may be required
to use a crane to remove mast sections from the motorized unit to avoid any overloads.
Refer to the
Load Capacities
section on p. 80 of for more information about loads allowed
on a motorized unit.
8-
Once at base level, remove any installed accessory such as hoist, monorail and weather
protection
structure.
9-
Remove all loads from the platform and make all workers step down.
10-
Remove all planking, push in all outriggers and secure in place. Remove and store all
guardrails. For instructions on the removal and storage of guardrails, refer to p. 118
of
the
Transport, Storage and Maintenance
section.
11-
Remove all installed cantilever bridges on each side of the motorized unit.
12-
If the unit is to be stored for any signifi cant length of time, refer to p. 118 of the
Transport,
Storage and Maintenance
section for instructions on how to properly store an M2 Series
motorized
unit.
The following dismantling steps can be used for a
standard confi guration
. The
following steps also apply to
a
non-standard confi guration equipped with
accessories but no 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.
A
B
1-
Prepare the installation as described in the safety guidelines for dismantling an
M2 Series installation, on p. 32.
2-
If the installation is equipped with weather protection, remove all tarps and shields
before the start of dismantling operations.
3-
It is important to note that any installed
monorail must not be used
during dismantling
operations.
4-
It is important to consider that any installed hoist can
only
be used to unload mast
sections
and
cannot be used above the last tie level installed.
5-
Bring the motorized units to the top of the work, verifying mast bolts and mast ties on
each mast on the way up. Make sure that all mast bolts are tightened at the appropriate
torque and that all mast ties are properly tied to the face of the work.
6-
Lower the motorized units linked by a bearing bridge until the units are two rungs
(20" or 50 cm) above base level, removing mast sections and mast ties on the way down.
To make sure that the installation remains stable, remove mast sections alternately – one
on one motorized unit, then one on the other. Refer to p. 75 of the
Masts and Mast Ties
section for instructions on how to remove and transport mast sections. Refer to p. 75
of
the
Masts and Mast Ties
section for instructions on how to remove mast ties.
Mast
sections should be stored horizontally and distributed equally on the motorized
units to ensure good balance
.
WARNING
It is
mandatory
to make sure that
all tension (or compression) is released
from the mast tie before attempting to unpin it from the wall tie
