Nexo Alpha System - Manual (Page 12)

α α α
P 12
USER MANUAL
VERSION :1.01
DATE : 06/10/10
• Correct training is fundamental to safe practise when working with loudspeakers flying systems. NEXO
recommend that users contact local industry associations for information on specialist course.
Information for UK and International training agencies can be obtained by contacting :
The Production Services Association (PSA),
School Passage,
Kingston-upon-Thames,
KT1 SDU Surrey,
ENGLAND
tel : +44 (0) 181 392 0180
2.2.2. G ROUND S TACKS S AFETY
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.
• X-BOW components can be used to stabilise ground stacks and to ensure that cabinets remain
securely registered to each other.
• 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 likely 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 must climb over 2m 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.