HK Audio CDR 210 F - Manual (Page 31)

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Figure 18: Mounting the bottom rigging frame
Figure 19: Attaching the lashing strap between the top
and bottom rigging frames
Figure 20: Hoisting the fully assembled COHEDRA®
mid/high array
9 Attaching the Bottom
Rigging Frame and Raising
the Mid/high Array
Once all COHEDRA ® mid/high enclosures have
been assembled in the desired array, you must
attach the bottom rigging frame to the lowest en-
closure. To do this, remove all three pins from the
lowest enclosure. First attach the front of the bottom
rigging frame and secure it using the pins, and then
insert the rear pin.
Now the enclosures are mounted, speaker cables
are all connected, and the pins are inserted in the
required configuration.
If you want to use the lashing strap to curve the
COHEDRA
® mid/high array, connect its hooks to
the bottom rigging frame and, using a shackle, to
the top rigging frame (see Figure 20). Tighten the
strap until it exerts enough force to curve the array
as desired.
The pin that determines the curving angle (the top
pin on the mid/high unit) is merely a predefined
stop for the flexible connector component when
the entire COHEDRA
® mid/high array is pulled
together accordion-style and thereby adjusted using
a lashing strap, chain hoist or motor attached at
the back. If no force is exerted, the entire mid/high
array is suspended at a 0° angle, meaning that the
pin is easily repositioned!
Do not use powerful chain hoists with low gear
ratios (that is, a powerful force action and a long
lashing strap)! A chain hoist that exerts too much
force relieves the load on the rigging system’s
rear pick-point, which means the pick-point’s
force action is distributed unfavorably across the
full length of the rigging frame. This can perma-
nently warp the rigging frame, thereby voiding the
operating permit.
Important notes on safety when curving the array
with lashing straps and chain hoists: When tigh-
tening the lashing strap or using a chain hoist,
ensure that just enough force is exerted to curve
the array to the desired extent along the rear of
the housings. Use a chain hoist with a maximum
load of 250 kg (8 m in length). This also suffices
for configurations with up to 24 Mid / High
units. If possible, choose a pick-point for the
chain hoist shackle near the top rigging frame’s
rear connector.
Never place or use motors between the rigging
frames for this purpose! This will overload the top
flight frame and impair operating safety!
Rigging and Curving COHEDRA ® System