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Lifting Bars with 1/2-inch screw pin anchor Shackles join the top array element to the truss module.
Only load-rated forged carbon-steel shackles should be used for hanging an array. Screw pin anchor shackles
come in a 1/2-inch size, which refers to the diameter of the body with the screw pin being 1/8-inch wider in
diameter. The shackle's load rating of 2,000 pounds should be stamped on the body of the shackle. Never use
non-rated hardware for rigging. Never substitute bolts for shackle pins, as the pins are forged and are much
stronger than bolts. Screw pin shackles should be finger-tightened only.
If the shackle or pin is damaged, it is no longer safe and should be discarded. Shackles should always
carry their load from the pin to the opposite end, never from side to side.
After the top row of speakers has been connected to their Truss Modules, all hardware must be re-
inspected to see that it is securely in place. By lifting the first row of speakers a couple of inches off the ground,
the way the speaker(s) hang from the motor(s) can be examined for the first time.
Common industry practice dictates that,
when using hoists or chain motors to lift weight,
the motor operator should call out a loud warning
to all nearby crew that the structure is "about to
move" so that all hands and feet are clear of injury.
Whenever the array is in motion, it must be clear
underneath, with a well-defined safety zone.
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