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Electro-Voice® EVA Series User Manual 31
7.0 Rigging Inspections and Precautions
Electro-Voice EVA Loudspeaker Systems: Prior to each use, inspect the enclosures for any cracks,
deformations or missing or damaged components that could reduce enclosure strength. Inspect the tie
plates between enclosures for cracks, corrosion or other deformations that could reduce their strength
and integrity. Check to be sure there are no missing screws and that all M10 rigging bolts are securely
tightened. Hardware that is bent or showing signs of more than cosmetic surface corrosion should be
replaced immediately.
Electro-Voice EVA Grids: Prior to each use, inspect the grid side bars and spreader bars for any
cracks, corrosion, missing or damaged parts or any other deformation that could reduce their strength and
integrity. Make sure there are no missing bolts and be sure all M10 rigging bolts are tightened securely.
Hardware that is bent or showing signs of more than cosmetic surface corrosion should be replaced im-
mediately.
Lifting Hoists: Prior to each use, inspect the lifting hoist(s) and associated hardware (including motor(s),
if applicable) for any cracks, deformation, broken welds, corrosion, missing or damaged components that
could reduce the hoist strength. Replace any damaged hoists. Never exceed the limitations or maximum
recommended load specified by the hoist manufacturer. Always follow manufacturers’ recommendations
for operation, inspection, and certification. Always raise and lower the load slowly and evenly, avoiding any
rapid changes in speed or shifting loads that could result in a sudden jolt to the suspended system or the
structure from which it is suspended.
Building, Tower or Scaffold Supports: Prior to each use, the strength and load-bearing capabilities
of the building, tower or scaffold structural supports should be evaluated and certified by a professional
engineer as being adequate for supporting the intended rigging system (including the loudspeakers, grids,
chain hoists and all associated hardware). Prior to each use, inspect the building, tower or scaffold struc-
tural supports for any cracks, deformation, broken welds, corrosion, missing or damaged components that
could reduce the structural strength. Damaged structural supports should be replaced or repaired and
recertified by a professional engineer. Never exceed the limitations or maximum recommended load for the
supports.
Miscellaneous Mechanical Components: Prior to each use, inspect all mechanical components
(chain, wire ropes, slings, shackles, hooks, fittings, ratchet straps, etc.) for any cracks, deformation, broken
welds, slipping crimps, fraying, abrasion, knots, corrosion, chemical damage, loose screws, missing or
damaged components that could reduce the maximum strength specified by the component manufacturer.
Replace any damaged mechanical components immediately. Never exceed the limitations or maximum
recommended load for the mechanical components.