d&b audiotechnik Q Series 리깅 매뉴얼 - 페이지 12
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WARNING!
Fig. 27: 2-leg safety wire with shackles
Fig. 28: Secondary safety - Type 1
a)
b)
Fig. 29: Secondary safety - Type 2
Q-Series Rigging manual
4. Secondary safety
The secondary safety suspension must be independent of
the primary suspension points and capable of carrying the
total system weight including all dynamic forces in case of a
failure of the primary suspension.
The additional safety device must be mounted in a way that
the array is caught by the safety device without significant
drop and swing in the event that the primary suspension
fails. For this reason the safety wire should suspend the
array right above its centre of gravity.
4.1.
Secondary safety at Z5159 Q Flying frame
The secondary safety can be attached in different ways using a 2-leg
safety wire (Fig. 27) connected to the Q Flying frame.
Type 1 - single hoist set up only
Connect the shackles of the safety wire to the centre bar of the Q Flying
frame using hole positions as equally distanced from the pickup point as
possible (Fig. 28).
Type 2 - single or dual hoist set up
Connect the shackles of the safety wire to the outer bars of the Q Flying
frame using hole positions in line with the centre of gravity (pickup point -
Fig. 29a). The shackles may also be placed diagonally around the pickup
point - Fig. 29b.
(1.2EN)
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