Introduction; About Suspending Loudspeakers; De-Rating Factors - Cerwin-Vega PROFESSIONAL CVA-28 Manual Del Usuario

MANUAL_CVFLY1A-A:MANUAL_CVFLY1A-A Originator R.Aramburu 215.9 x 279.4 12/12/2008 9:52 AM Page 1
Cerwin-Vega! CVA-28 Active Speaker System - Rigging Instructions
1.

INTRODUCTION

These instructions are to be used when suspending a single CVA-28 or when suspending multiple CVA-28s using
the CVFLY-1A Flyware Kit. Read and follow these instructions carefully!
2.

ABOUT SUSPENDING LOUDSPEAKERS

Suspending loudspeakers is serious business! Injury or death can occur if loudspeaker systems are not
suspended correctly! Never use handles for suspending loudspeakers. They are not rated or designed for this
purpose.
Speaker suspension must take place in accordance with instructions provided by Cerwin-Vega! and under the
supervision of a licensed, professional sound/rigging engineer or structural engineer. Only use attachments,
mounts, accessories, or brackets specified by Cerwin-Vega! or professionally specified products rated and
approved for overhead suspension. Refer all servicing to qualified personnel. Servicing is required when the
apparatus has been damaged in any way.
Warning! Before placing, installing, rigging, or suspending any speaker product, inspect all hardware,
suspension systems, cabinets, transducers, brackets, and associated equipment for damage. Any missing,
corroded, deformed or non-load rated component could significantly reduce the strength of the suspension,
placement, or array. Any such condition severely reduces the safety of the suspension and should be immediately
corrected. Use only hardware which is rated for the loading conditions of the suspension and any possible
short-term unexpected overloading. Never exceed the rating of the hardware or equipment. Consult a licensed,
professional engineer when any doubt or questions arise regarding a physical equipment installation.
Cerwin-Vega! is not responsible for damage or liability for improperly installed or maintained mounting and/or
rigging systems.
3.

DE-RATING FACTORS

Using any mounting point or hardware at an angle will de-rate the Working Load Limit (WLL) for that point.
Points mounted at an angle should be de-rated according to the following formula;
- WLL = cosine (mounting angle) X 150
- Mounting angle = degrees from vertical pull
- 150 = working load limit for each mounting point at vertical pull
Caution All hardware used for overhead suspension should be designed and used with a minimum 5:1
designed safety factor. This is the ratio between the structural failure point and the loading to be applied to the
component.
Periodically inspect and maintain all rigging points on the suspension system and all suspension hardware.
Danger Hardware found at your local hardware store should not be used as it may not be rated for this
application. Cerwin-Vega! is not responsible for damage caused by use of improper hardware.
1