Electro-Voice EVI-AC handleiding
Handleiding
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EVA Expandable Vertical Array Rigging-strength ratings and safety factors | en 31
Electro-Voice
Installation manual
2023-01 | 04 | F01U196199
8 Rigging-strength ratings and safety factors
8.1 Working-load limit and safety factor definitions
The structural ratings for all of the EVA rigging components and complete loudspeaker
systems are based on test results in which parts were stressed to failure. Manufacturers
typically present the structural-strength ratings of mechanical components or systems as
either the working-load limit (WLL) or the ultimate-break strength. Electro-Voice chooses to
present the structural-load ratings of the EVA loudspeaker systems as the working-load limit.
The working-load limit rating represents the maximum load that should ever be applied to a
mechanical component or system.
!
Warning!
Never apply a load that exceeds the working-load limits of any of the rigging components or
complete loudspeaker systems described in this manual.
The working-load limits for the EVA rigging components and complete loudspeaker systems
described in this manual are based on a minimum 8:1 safety factor. The safety factor is
defined as the ratio of the ultimate-break strength divided by the working-load limit, where the
ultimate-break strength represents the force at which a part will structurally fail. For example,
if a part has a working-load limit of 1,000lb (454kg), it would not structurally fail until a force
of at least 8,000lb (3,629kg) is applied, based on an 8:1 safety factor. However, the user
should never apply a load to that part that exceeds 1,000lb (454kg). The safety factor
provides a margin of safety above the working-load limit to accommodate normal dynamic
loading and normal wear.
!
Caution!
Never exceed the working-load limits defined by the manufacturer of any rigging component.
Electro-Voice bases the working-load limits of its EVA products on a minimum of an 8:1 safety
factor. Other manufacturers of rigging components may base their working-load limits on
safety factors other than 8:1. For example, 5:1 safety factors are fairly common amongst
rigging manufacturers because many regulatory agencies call for a minimum safety factor of
5:1.
!
Caution!
If local regulations only require a safety factor of 5:1, Electro-Voice insists that the working-
load limits of the EVA rigging never be exceeded and that an 8:1 safety factor be maintained
for the EVA loudspeakers.
!
Caution!
Some local regulations may require safety factors higher than 8:1. In that circumstance,
Electro-Voice insists that the user maintains the higher safety factor as required by the local
regulations throughout the entire EVA installation. It is the responsibility of the user to make
sure that any EVA installation meets all applicable local, state or federal safety regulations.
8.2 Structural-rating overview
Designing a safe structural array is ordinarily a very complex process best left to experienced
professionals.
Two independent strength considerations give a complete description of the overall structural
capabilities of any loudspeaker system:
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Productinformatie
| Merk | Electro-Voice |
| Model | EVI-AC |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 3734 MB |
