Nexo LS18 - Manual (Page 28)

Page 28/103 GEO S12 HARDWARE SETUP PROCEDURE
 When deploying a GEO S12 & LS18 system always wear protective headwear, footwear
and eye protection.
 Do not allow inexperienced persons to handle a GEO S12 & LS18 system. Installation
personnel should be trained in loudspeaker flying techniques and should be fully
conversant with this manual.
 Ensure that motor hoists, hoist control systems and ancillary rigging components are
currently certified as safe and that they pass a visual inspection prior to use.
 Ensure that public and personnel are not allowed to pass beneath the system during the
installation process. The work area should be isolated from public access.
 Never leave the system unattended during the installation process.
 Do not place any object, no matter how small or light, on top of the system during the
installation procedure. The object may fall when the system is flown and is likely to
cause injury.
 Secondary safety steels must be installed once the system has been flown to the
operating height. Secondary steels must be fitted irrespective of requirements of the
local safety standards applicable to the territory.
 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 GEO S12 & LS18 Rigging System are based on a 1/1.2 factor for hoist or motor
acceleration).
 NEVER attach any item to the GEO S12 & LS18 system other than the GEO S12 &
LS18 accessories.
 When flying outdoor systems ensure that the system is not exposed to excessive wind
or snow loads and is protected from rainfall.
 The GEO S12 & LS18 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 GEO S12 & LS18 components carefully to prevent damage
in transit.
8.1.2 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.