Nexo RS - Manual (Page 25)

RS18 R IGGING I NSTRUCTIONS Page 25/54
• Ensure that the system is secure and prevented from pivoting around the motor hoist.
• Avoid any form of excessive dynamic loading to the assembly (structural computations on RS18
Rigging System are based on a 1/1.2 factor for hoist or motor acceleration).
• NEVER attach any item to the RS18 system other than the RS18 accessories.
• When flying outdoor systems ensure that the system is not exposed to excessive wind or snow loads
and is protected from rainfall.
• The RS18 Rigging System requires regular inspection and testing by a competent test centre. NEXO
recommend that the system is load tested and certified annually or more frequently if local regulations
require.
• When de-rigging the system ensure that the same duty of care is given to the procedure as for the
installation. Pack RS18 components carefully to prevent damage in transit.
5.1.2 Ground Stacking Safety
Statistically, many more injuries occur due to unstable ground stacked PA systems than those
associated with flown systems. There are several reasons for this fact, however the message is clear:
• Always survey the supporting structure upon which a ground stack is to be built. Always look beneath
PA wings to inspect the deck support and if necessary ask for the stage scrims and dressings be
removed to allow access.
• If the stage surface slopes, as it does in some theatres, ensure that the system is prevented from
sliding forwards due to vibration. This may require the fitting of timber battens to the stage floor.
• For outdoor systems ensure that that the system is protected from wind forces which might cause the
ground stack to become unstable. Wind forces can be huge, especially upon large systems, and
should never be underestimated. Observe meteorological forecasts, calculate the “worst case” effect
upon the system prior to erection and ensure that the system is secured appropriately.
• Take care when stacking cabinets. Always employ safe lifting procedures and never attempt to build
stacks without sufficient personnel and equipment.
• Never allow anyone, whether operators, artists or members of the public to climb onto a ground
stacked PA system. Anyone who needs to climb over 2m (6 ft) high should be fitted with suitable
safely equipment including a clip-on harness. Please refer to local Health and Safety legislation in
your territory. Your dealer can help with advice on access to this information.
• Apply the same attention to all safety matters when de-stacking systems.
• Be aware that safety procedures are as important in the truck and in the warehouse as they are at the
venue.