Ground Stacking Safety - Nexo GEO M1210 System Manual

GEO M12 HARDWARE SETUP PROCEDURE Page 25/90
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 M12 &
MSUB18 Rigging System are based on a 1/1.2 factor for hoist or motor acceleration).
NEVER attach any item to the GEO M12 & MSUB18 system other than the GEO M12 & MSUB18
accessories.
When flying outdoor systems ensure that the system is not exposed to excessive wind or snow loads and
is protected from rainfall.
In case of wind greater than 8 on Beaufort scale (72km/h – 45mph), a touring system has to be landed or
an additional securing has to be implanted.
For fixed installations, wind loading has to be taken into account in accordance to the national standards.
The GEO M12 & MSUB18 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 M12 & MSUB18 components carefully to prevent damage in transit.

6.1.2 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.