117
fi g. 7.109
fi g. 7.110
fi g. 7.111
7 - A
CCESSOIRES
Mast Base Plates
(optional)
Dismantling guidelines (cont’d)
11-
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.
Multiple Mast Handler
(optional)
The use of the multiple mast handler will allow the qualifi ed erector/dismantler to install
pre-assembled lengths of mast (also referred to as "sticks") and reduce the time required
to achieve the installation of the setup.
1-
Pre-assemble a length of mast sections on the ground. Mast sections must be laid
down horizontally on the ground. For instructions on the assembly of mast sections,
refer to p. 69 of the
Masts and Mast Ties
section. Tighten all bolts to 120 lb-ft (163 N-m).
The length of pre-assembled mast allowed will be equal to the authorized height in
feet (meters) between two tie levels for the confi guration, according to the selected
method of installation and the mast tie schedule specifi c to that method of installation.
For more information about methods of installation, refer to p. 18 of the
Motorized
Unit
section. Refer also to the
Mast Tie Schedule
on p. 70 for information about
distances between tie levels.
Installation
Highest step
of lowest
mast section
Maximum length equal to authorized height
between two tie levels
2-
Install the mast handler on the highest step of the lowest mast section of the
pre-assembled length of mast (fi g. 7.109).
It is important to consider the weight of the pre-assembled length of mast that must
be lifted and to make sure to select a sling, chain or cable that can lift that weight.
For example, a pre-assembled 30' (9,1 m) length of mast sections will weigh
1410 lb (640 kg).
3-
Insert the sling (or chain or cable) through the pre-assembled length of mast and
attach the hook to the shackle on the mast handler.
4-
Using a crane (or a forklift), carefully lift and lower the pre-assembled length of mast
on top of the last mast section installed.
5-
Still holding the length of mast, attach the bottom mast section to the top of the mast
section already installed. For instructions on the assembly of mast sections, refer to
p. 69 of the
Masts and Mast Ties
section. Tighten all bolts to 120 lb-ft (163 N-m).
6-
Remove the shackle from the mast handler to release the hook and sling.
7-
Remove the mast handler from the mast section.
8-
Raise the motorized unit on the newly added length of mast and install the next tie
level.
9-
Repeat steps 2 to 8 for each pre-assembled length of mast to install, as required and
allowed.
Sling
attached to
shackle on
mast handler
Mast handler shown in red for illustration purposes only
