background image

12

en | Rigging strength ratings and safety factors

EVC Variable-Intensity Loudspeakers

2019-10 | 04 | F.01U.378.116

Installation manual

Electro-Voice

5

Rigging strength ratings and safety factors

Working load limit and safety-factor definitions

The structural ratings for all EVC rigging components and 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 loudspeaker systems as the WLL. The WLL rating represents the maximum load
that should ever be applied to a mechanical component or system.

!

Warning!

Never exceed the limitations or maximum recommended working load for Electro-Voice
loudspeakers.
Disregarding this warning could result in serious injury or death.

The WLL for the rigging components and loudspeaker systems described in this manual is
calculated with a 10:1 safety factor, which exceeds the minimum 8:1 safety factor normally
specified by Electro-Voice. The safety factor is defined as the ratio of the ultimate-break
strength divided by the WLL, where the ultimate-break strength represents the force at which
a part will structurally fail. For example, if a part has a WLL of 100 lb (45.4 kg), it would not
structurally fail until a force of at least 1,000 lb (453.6 kg) was applied, based on a 10:1 safety
factor. However, the user should never apply a load to that part that exceeds 100 lb (45.4 kg).
The safety factor provides a margin of safety above the WLL to accommodate normal dynamic
loading and normal wear.

Cautions for working load limits and safety factors

The WLL defined by the manufacturer of any rigging component should never be exceeded.
Other manufacturers of rigging components may base their WLL on safety factors other than
10:1. For example, 5:1 safety factors are fairly common among rigging manufacturers because
many regulatory agencies call for a minimum safety factor of 5:1.
When an EV loudspeaker system is installed where local regulations only require a safety
factor of 5:1, Electro-Voice insists that the WLL of the loudspeaker rigging never be exceeded
and that an 10:1 safety factor be maintained.
The user is cautioned that some local regulations may require safety factors higher than 10:1.
In those circumstances, Electro-Voice insists that the user maintain the higher safety factor as
required by the local regulations throughout the entire loudspeaker installation. It is the
responsibility of the user to make sure that any loudspeaker installation meets all applicable
local, state or federal safety regulations.

Recommended practice for eyebolts

Eyebolts can be used to suspend individual loudspeakers when attached through the integral
M10 attachment points. It is a good idea to orient the suspending cable so that it hangs within
30° of the straight-up position in the plane of pull (left illustration), and within 15° against the
plane of pull (right illustration).

Содержание EVC-1122-VIBTEN54

Страница 1: ...EVC Variable Intensity Loudspeakers EVC 1122 VIBTEN54 EVC 1122 VIWTEN54 en Installation manual...

Страница 2: ......

Страница 3: ...4 2 Preparing the EVC loudspeakers for installation 8 4 2 1 Unpacking and inspection 8 4 2 2 Scope of delivery 8 4 2 3 Recommended pre installation procedures 8 4 3 Working with mounting accessories 9...

Страница 4: ...voided this will result in an electrical shock serious bodily injury or death Warning Medium risk Indicates a potentially hazardous situation If not avoided this may result in minor or moderate injury...

Страница 5: ...uality installed sound reinforcement systems While many implementations deliver excellent performance one key drawback is that SPL can vary significantly over the audience area from front to back and...

Страница 6: ...ve also eliminated the cost of a properly designed two box system which needs to include another power amplifier channel for proper power control and impedance matching Labor savings in the box Varia...

Страница 7: ...ottom rear of the loudspeaker The horizontal coverage pattern will maintain a width that is approximately twice as wide as the mounting height measurement the vertical throw will be about three times...

Страница 8: ...e you are the only person who can claim damages in transit Keep the cardboard box and all packaging materials for inspection by the transport company Keeping the cardboard box including all packing ma...

Страница 9: ...suspend a loudspeaker not provided by Electro Voice is the responsibility of others Electro Voice assumes no liability for any damage or personal injury resulting from improper use installation or ope...

Страница 10: ...ebolt accessory kits EVC loudspeakers do not ship with eyebolts To suspend the speaker it is necessary to order one of the accessory eyebolt kits sold separately EBK M10 3PACK optional eyebolt kit con...

Страница 11: ...enclosure Never install the eyebolt without the washer included with the eyebolt kit 3 Finger tighten the eyebolt until the correct alignment position is obtained A maximum of one complete turn 4 Inst...

Страница 12: ...453 6 kg was applied based on a 10 1 safety factor However the user should never apply a load to that part that exceeds 100 lb 45 4 kg The safety factor provides a margin of safety above the WLL to a...

Страница 13: ...ngle limits for individual eyebolts page 13 for specific eyebolt angle and weight limitations when using eyebolt suspension These limits are not to be exceeded under any circumstances If a safety fact...

Страница 14: ...e limit 60 MAX 60 MAX Figure 5 2 All eyebolt suspension line angle limit independent left or bridled right suspension lines Left to right all eyebolt suspension angles The suspended all eyebolt cluste...

Страница 15: ...t the internal crossover equalizer network sends low frequencies to the woofer and high frequencies to the compression driver waveguide combination In addition the network tailors the frequency respon...

Страница 16: ...ALL UNUSED CONNECTOR SCREWS WARNING EYEBOLTS MUST BE FULLY SEATED AND ORIENTED IN THE PLANE OF PULL AS SHOWN ALWAYS USE WASHERS TO DISTRIBUTE SUS PENSION LOADS INCORRECT CORRECT WARNING READ AND FULLY...

Страница 17: ...typically be used to adjust the in room frequency response In addition the DSP should be used to provide the high pass filters recommended to protect the EVC 1122 VITEN54 from overdrive at frequencie...

Страница 18: ...adding incremental filtering only to the extent required by the current level in the loudspeaker Notice Each group of four terminals is electrically connected in parallel to the group of four termina...

Страница 19: ...er handling2 150 W Continuous 600 W Peak LF transducer EVS 12M HF transducer DH 3 Connectors Dual four pin 10 AWG Phoenix Euro Block screw terminals Enclosure 15 mm plywood with EVCoat Grille 18 GA po...

Страница 20: ...ical data EVC Variable Intensity Loudspeakers 2019 10 04 F 01U 378 116 Installation manual Electro Voice Dimensions 69 63 276 6 mm 10 89 in 411 0 mm 16 18 in 527 8 mm 20 78 in 647 6 mm 25 50 in 202 0...

Страница 21: ...erage Vertical coverage Hz dB SPL Degrees Degrees 500 68 140 185 630 69 5 800 67 5 1000 69 110 140 1250 67 1600 64 5 2000 63 105 145 2500 63 5 3150 66 5 4000 61 5 85 100 Tab 9 5 Reproducibility and co...

Страница 22: ...nual Electro Voice 100 V Transformer coupled 150 W 65 75 W 130 Notice The specifications data was measured in an anechoic chamber according to EN 54 24 See drawing for reference plane reference axis a...

Страница 23: ...16 0905 Bosch Security Systems Inc 130 Perinton Pkwy Fairport NY 14450 USA 19 0905 CPR 192014 01 EN 54 24 2008 Loudspeaker for voice alarm systems for fire detection and fire alarm systems for buildin...

Страница 24: ...24 EN54 24 technical information EVC Variable Intensity Loudspeakers 2019 10 04 F 01U 378 116 Installation manual Electro Voice...

Страница 25: ......

Страница 26: ...obert Bosch Ring 5 85630 Grasbrunn Germany www boschsecurity com Bosch Sicherheitssysteme GmbH 2019 Bosch Security Systems Inc 12000 Portland Avenue South Burnsville MN 55337 USA www electrovoice com...

Отзывы: