Electro-Voice EVA Series User Manual
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6.0 Rigging-Strength Ratings and Safety Factors (cont’)
6.3 Simplified Structural-rating Guidelines
The simplified structural-rating guidelines for EVA loudspeakers are charted in section 6.5. These guide-
lines were determined based on the:
1.
Vertical elevation possible with EVA-SG2, EVA-EG2 and EVA-CG grids.
2.
Total weight of all enclosures in the array plus accessories, cabling and rigging.
3.
Angled forces acting on rigging components and enclosures.
WHEN APPLyING THE STRUCTURAL RATING GUIDELINES TO ANy EVA LOUDSPEAKER
SySTEM SUSPENDED OVERHEAD, THE USER MUST OBEy THE FOLLOWING RULES:
1.
Never exceed
720 lb (327 kg)
total column weight of suspended EVA-1151D and EVA-
2082S loudspeakers, accessories and cabling. (Typically any combination of eight EVA-
2082S and/or EVA-1151D modules.) When flown in the same column with full-range
modules from an EVA-SG2 or EVA-EG2 grid, subwoofers must always be at the TOP of the
array with NO SPLAy BETWEEN MODULES.
2.
If a second grid is used at the bottom of the array, the angle between the suspension lines
must never be allowed to exceed 60° as shown in Figure 19.
Do not use EVA-CG, EVA-
EG or EVA-EG2 grids in this application!
3.
The suspended column must be perpendicular (plumb) to within ±5 degrees as shown in
Figure 21.
4.
If a spreader bar or grid is suspended from two points, the angle between those two sus-
pension lines must not exceed 60° (maximum 30° from plumb each) as shown in Figures 22
and 23.
5.
Never exceed
760 lb (345 kg)
total column weight when using the EVA-CG coupler grid.
When flying EVA-1151D modules behind EVA-2082S full-range modules on the EVA-CG
coupler grid, the maximum number of EVA-2082S full-range modules at the front of the grid
is FIVE and the maximum number of EVA-1151D subwoofer modules at the rear of the grid
is THREE. A bottom pull-up is not allowed when using the EVA-CG. Flying a single col-
umn from the EVA-CG is not allowed.
