41
fi
g. 1.53
fi
g. 1.54
A
B
D
D
C
C
B
A
1 - M
ਮਲ਼ਮਨਹਤਣ
U
ਭਨਲ਼
Dismantling a multiple units installation with mast ties
Setup and Confi gurations
5-
Bring the motorized units to the top of the work, verifying mast bolts and mast ties on the
way up. Make sure that all mast bolts are properly tightened, that all anchor bolts are in
place and in good condition and that mast ties are properly tied to the face of the work.
6-
Lower the motorized units to base level, removing mast sections and mast ties on the
way down,
leaving two tie levels in place on each motorized unit
. Refer to p. 85
of the
Mast and Mast Ties
section for instructions on how to remove and transport
mast sections. Refer to p. 91 of the
Mast and Mast Ties
section for instructions on
how to remove mast ties.
No loads allowed in
this area
Only
one
5' (1,5 m) cantilever
at this end
Only
one
5' (1,5 m) cantilever
at this end
7- Mast sections must be stored and evenly distributed on each side of the mast
to ensure good balance
. There can be up to a
maximum of four mast sections on
each side of the mast at a time
.
A ninth mast section can be loaded on the link bridge of the motorized unit, as shown
in fi g. 1.54. It is recommended to install an optional deck extension on one of the fi rst
cantilevers attached to the unit to facilitate the handling of mast sections with the jib
arm. The deck extension must be installed on the side
opposite
to the jib arm, as
shown in fi g. 1.54. For information about the use and installation of an optional deck
extension, refer to p. 55 of the
Bridges
section.
1
2
th
D
A
Four mast sections on fi rst cantilever attached
to unit
C
Optional deck extension installed on the opposite
side of the jib arm
B
Four mast sections on fi rst bridge of the bearing
bridge structure
D
Jib arm installed on the opposite side of the
deck extension
Bearing bridge structure
No loads allowed in
area shown in red
If required, use a crane to remove mast sections from the two 5’ (1,5 m) bridges attached
to the unit to avoid any overloads. Refer to the
Load Capacities
section on p. 94 of
for more information about loads allowed on an installation.
WARNING
During dismantling, only mast sections can be loaded on the two 5' (1,5 m)
cantilevers attached to the unit and on the fi rst bridge of the bearing bridge
structure at each end, as shown in fi g. 1.54. It is important to note that no other
loads are allowed on the bridges until the dismantling process is complete.
WARNING
It is
mandatory
to make sure that
all tension (or compression) is released
from each mast tie before attempting to unpin it from the wall tie.
