Electro-Voice EVI-AC handleiding
Handleiding
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32 en | Rigging-strength ratings and safety factors EVA Expandable Vertical Array
2023-01 | 04 | F01U196199
Installation manual
Electro-Voice
1. The strength of each individual enclosure rigging point, which is the combined strength of
the internal rigging straps, external tie plates, bolts and enclosure.
2. The total strength of the overall array, which is a function of the combined forces from all
of the rigging points acting on the rigging components and the array as a whole.
Two independent strength considerations give a complete description of the overall structural
capabilities of the grid:
1. The strength of each individual grid rigging point, which is the combined strength of the
bolts, grid side arms and spreader bars.
2. The total strength of the overall grid, which is a function of the combined forces from all
of the rigging points acting on the rigging components and the grid as a whole.
In any system, the forces acting on each loudspeaker (on each individual rigging point and on
the overall enclosure) and the forces acting on each rigging accessory (grids and spreader
bars) will vary with each array configuration. Determining those forces throughout an array
requires complex mathematical calculations.
For a set of simplified structural-rating guidelines, refer to
Structural rating charts, page 34
.
These guidelines combine destructive testing and computer modeling, enabling a rigger to
determine immediately on site whether an array is safe.
To make EVA systems both safe and easy to use, Electro-Voice engineers have chosen to treat
EVA arrays as a single unified structure rather than individual components. All the complex
factors have been taken into account to design a rigging system strong enough to maintain a
minimum 8:1 safety factor up to a maximum suspended column weight of 720lb (327kg) at
any elevation (tilt) angle available on the EVA-SG2 or EVA-EG2 grid with any combination of
EVA-1151D (discontinued) and/or EVA-2082S modules. The maximum suspended column
weight for the EVA-CG coupler grid (discontinued) is 760lb (345kg). The EVA-2151D may only
be flown from the EVA-EG2 grid. The maximum single-point suspended column weight using
EVA-2151D subwoofers is 840lb (381kg). Refer to
Special rules when flying EVA-2151D
subwoofer modules, page 32
.
Refer to
– Structural rating charts, page 34
– Special rules when flying EVA-2151D subwoofer modules, page 32
8.3 Special rules when flying EVA-2151D subwoofer modules
EVA-2151D subwoofers may only be flown from an EVA-EG2 grid. Because the EVA-2151D
modules have six rigging points instead of four, the maximum load ratings are higher, but
require special conditions to achieve.
When flying EVA-2082S full-range modules below EVA-2151D subwoofer modules:
– Use up to two EVA-2151D modules and up to five EVA-2082S modules.
– Use a bottom pull-up point as long as the maximum angle on the grid does not exceed 45°
and the maximum pull angle between suspension lines does not exceed 60°.
– Do not exceed the maximum single-point column weight of 840lb (381kg) when using
EVA-2151D subwoofers.
When flying EVA-2151D subwoofer modules as a stand-alone subwoofer array using the center
attachment point on the spreader bar(s):
– Use up to four EVA-2151D modules, even if using two spreader bars.
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Productinformatie
| Merk | Electro-Voice |
| Model | EVI-AC |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3734 MB |
