d&b J-Series - Manual (Page 15)

3.6. Secondary safety
WARNING! The secondary safety suspension must be independent of
the primary suspension points and capable of carrying
the total system weight.
The additional safety device must be mounted in a way
that the array is caught by the safety device without any
drop and swing in the event that the primary suspension
fails.
3.6.1. Secondary safety at the Z5300 J Flying frame
The Z5300 J Flying frame is equipped with four safety points [1.2]. Two
are located at the front bar and two at the cross bar of the frame. The
latter being the default suspension for the secondary safety are fitted
with two 3.25 t shackles.
We recommend the use of the Z5303 J Safety chain set which is
supplied with the J Flying frame.
Assembly
Fig. 22: Ring cotter to secure
the 3.25 t shackle [S].
1. Before attaching the safety device ensure the two 3.25 t shackles
are properly fitted to the frame and secured against loosening with
a locked ring cotter - Fig. 22.
2. When attaching the Safety chain set ensure the chains are not
twisted and the hooks [H] are in the right direction as shown in in the
graphic below - Fig. 23.
Fig. 23: Secondary safety at the Flying frame
J-Series Rigging manual (1.3 EN) Page 15 of 34