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Electro-Voice EVF/EVH User Manual52
7.0 Rigging Inspections and Precautions
Electro-Voice EVF and EVH 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 rigging plates, tie plates and stabilizer bars between enclosures for cracks, corrosion or other defor-
mations that could reduce their strength and integrity. Check to be sure there are no missing screws and
that all M5 connector bolts and M10 rigging bolts are securely tightened. Hardware that is bent or show-
ing signs of more than cosmetic surface corrosion should be replaced immediately.
Lifting Hoists: Prior to each use, inspect the lifting hoist(s) and associated hardware (including motors, if
applicable) for any cracks, deformation, broken welds, corrosion or 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 or 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 or 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.