KF760 Series Rigging Procedures PRELIMINARY DRAFT -- 21 Aug 01
KF760 Series Rigging Procedures PRELIMINARY DRAFT -- 21 Aug 01 Page 3 of 29
2. Secure the Fly-Bar to the top enclosure with four short connecting pins, one in each of the Fly-Bar s
four Hinge Tubes, attaching it through the hinges of the top enclosure.
1.4.4
Tail Bar:
Leave two long connecting pins in the Tail Bar for attaching it to the Spreader.
1.4.5
Pull-Back Bar:
No connecting pins stay with this part. If properly prepared for use (see section 1.4.1), there should be
two short connecting pins available in the bottom of any enclosure s Hinge Tubes for attaching the Pull-
Back Bar to the bottom enclosure of the array.
1.5
TO PULL-BACK OR NOT TO PULL-BACK
The KF760 Wizard will show where the Spreader Bar must be positioned for the correct down tilt angle for
the entire array. If this angle is beyond what is possible by positioning the Spreader Bar, the Wizard will
indicated a pull-back is needed. This requires an additional pick point and chain motor.
1.5.1
Two pull-back methods
:
1. Tail-Bar — This will pull the top rear of the array up to achieve the correct hang angle.
Advantages: The chain motors are all at essentially the same height. When running all three
motors, the lift distances will be about the same.
Disadvantages: The pull-back motor will have a much greater load on it than when using the Pull-
Back Bar. The number of degrees of pull-back is limited to
±
15 degrees.
2. Pull-Back Bar — This will pull up on the bottom rear of the array to achieve the correct hang angle
Advantages: The pull-back motor will have a much less load on it than when using the Tail-piece.
The number of degrees of pull-back is not limited.
Disadvantage: The pull-back motor rides near the bottom of the array. When running all three
motors, the pull-back motor will lag behind in lift distance.
2
RIGGING PROCEDURES
The following rigging procedure is the recommended method for assembling and disassembling a KF760
array. While it is possible to use other techniques than the ones shown, EAW recommends you use the
procedures detailed below.
While these rigging procedures may seem complex, in reality they are quite easy to perform. During the
photography session for the pictures contained herein, the array depicted in the procedures was loaded in
and loaded out several times. Each time, the complete load-in or load-out procedure took approximately
six minutes as performed by two, non-professional personnel.
The rigging sequences show the steps for load in and load out of an eight over two array. This means
eight KF760s are under hung with two KF761s. Depending on the number and types of enclosures in a
KF760 array, the sequence you need may differ. However, the specific details of the steps for rigging
KF760s or KF761s will be the same.
WARNING: During the rigging procedure, there will be considerable weight being moved and lifted
overhead. Depending on the array configuration, the array may tend to swing forward or
backwards as additional enclosures are added and as the array s weight is taken by the chain
motors. Personnel near the array must be aware that this can and will happen and should
position themselves appropriately to prevent injury or death.
