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Manual Voice-Acoustic PA-Tower - 2019-02 EN
Intended use
The Voice-Acoustic PA-Tower is a tower construction made of aluminium trusses by HOF-Alute (system HOF-
Kon 290-4) to accommodate loudspeakers with a total weight of max. 300 kg Outdoor (Indoor 400 kg) and a
wind contact area of max. 1.5 m² with a maximum lifting height of 4.7 m to the upper edge of the loudspea-
kers.
The wind load of the tower is limited to wind forces up to 15 m/sec!
When using your own truss elements, the overall height of 5 m must not be exceeded, otherwise a constructi-
on book is required.
Not intended use
Do not use the Voice-Acoustic PA Tower:
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Outdoor with higher loads than 300 kg, Indoor max. 400 kg
■
With wind attack areas of the loudspeakers of more than max. 1.5 m².
■
At wind speeds above 15 m/sec
■
For person transport
■
For the transport of equipment that is not intended for use, such as scenery, flags, etc.
■
The assembly and disassembly may only be carried out by qualified personnel or instructed persons!
■
Observe the instructions in the manual when assembling and disassembling!
■
Before each installation of the load, carry out a visual inspection for proper installation!
■
Only use material supplied by the manufacturer or at least equivalent material!
■
The state and trade association regulations must be observed!
Connection
The individual components of the PA tower are connected with cone connectors which are fastened with co-
nical bolts in the ends of the belt tubes. The result is a completely non-positive connection with power trans-
mission in the axes of the main belts.
Non-positive connections require a normal force on the surfaces to be connected. Their mutual displacement
is prevented as long as the counter-force caused by the static friction is not exceeded.
The advantages of the conical connection include quick and easy assembly, backlash-free connection and the
compensation of wear in the bores by the conical bolts.
Floor loading
Before installing the PA tower on a level surface, the load-bearing capacity of the floor must be ensured.
The construction on solid ground such as stone, concrete, asphalt is unproblematic, when building on green
areas, sand or gravel / gravel it must be ensured that none of the spindle feet can sink in.
If the contact surface of the spindle feet must be increased due to a „soft“ floor in order to prevent them from
sinking in, this may only be done by means of suitable measures, e.g. multiplex underlays or equivalent, not
less than 30 mm thick!
If only steel plates are available for underlaying, the mast must be additionally secured against slipping.
Introduction
