50
fi
g. 3.1
fi
g. 3.2
fi
g. 3.3
fi
g. 3.4
3 - B
ਨਣਦਤਲ
Standard bridge
Guardrail
Tapered bushing
Pairs of bushings in middle of
bridge
Top outrigger
Bolt for assembly
Bottom outrigger pockets
Guardrail
Top outrigger
Required
for bridge
assembly
Required
for bridge
assembly
Required
for bridge
assembly
Location of bolt
assemblies (6)
Outrigger
Required
for bridge
assembly
Installation of a bridge
fi
g 3 4
1-
Align the bridge with the motorized unit or another bridge using the tapered bushings
(large white arrows, fi g. 3.1).
2-
Assemble both structures together using
six
bolt assemblies: one 5/8" x 5 1/2" (
GR8
)
hex bolt, one 5/8" (
GR8
) lock washer and one 5/8" (
GR8
) nut in each of the four corner
tapered bushings and in
one
of the pairs of bushings in the middle of the bridge (using
top and bottom bushings on either side – left
or
right, fi g. 3.4). Tighten all bolt assemblies
to a torque of 120 lb-ft (163 N-m).
3-
Set up bridges alternately on each side of the mast in such a sequence as to warrant
the balance of the structure.
1-
Inspect the structure of the bridge, including the inside of the open-end tubes, for any
sign of damage or distortion. Clean the bridge and its components thoroughly to limit
the eff ects of any corrosive agent.
2-
Bridges must not be stored directly on the ground. Make sure to place suffi cient cribbing
under the bottom chords to prevent damages to the bottom of the structure.
3-
Avoid storing the bridge in a location with direct exposure to aggressive or corrosive
materials in the surroundings.
Storage of a bridge
