L-Acoustics ARCS II Quick start guide

ARCS II

rigging manual (EN)

ARCS®II SYSTEM

rigging manual

VERSION 1.1

ARCSII_RM_EN_1-1 w w w . l - a c o u s t i c s . c om 2

Document reference: ARCSII_RM_EN_1.1

Distribution date: March 21, 2017

No part of this publication may be reproduced or transmitted in any form

or by any means without the express written consent of the publisher.

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SAFETY INSTRUCTIONS

1. Read this manual

2. Heed all SAFETY INSTRUCTIONS as well as DANGER and OBLIGATION warnings

3. Never incorporate equipment or accessories not approved by L-ACOUSTICS®

4. Read all the related PRODUCT INFORMATION documents before exploiting the system

The product information document is included in the shipping carton of the related system component.

5. Work with qualified personnel for rigging the system

Installation should only be carried out by qualified personnel that are familiar with the rigging techniques and safety

recommendations outlined in this manual.

6. Ensure personnel health and safety

During installation and set-up personnel must wear protective headgear and footwear at all times. Under no

circumstances personnel is allowed to climb on a loudspeaker array.

7. Respect the Working Load Limit (WLL) of third party equipment

L-ACOUSTICS®is not responsible for any rigging equipment and accessories provided by third party

manufacturers. Verify that the Working Load Limit (WLL) of the suspension points, chain hoists and all additional

hardware rigging accessories is respected.

8. Respect the maximum configurations and the recommended safety level

For safety issue, respect the maximum configurations outlined in this manual. To check the conformity of any

configuration in regards with the safety level recommended by L-ACOUSTICS®, model the system in

SOUNDVISION and refer to the warnings in Mechanical Data section.

9. Be cautious when flying a loudspeaker array

Always verify that no one is standing underneath the loudspeaker array when it is being raised. As the array is

being raised, check each individual element to make sure that it is securely fastened to the adjacent element.

Never leave the array unattended during the installation process. As a general rule, L-ACOUSTICS®recommends

the use of safety slings at all times.

10. Be cautious when ground-stacking a loudspeaker array

Do not stack the loudspeaker array on unstable ground or surface. If the array is stacked on a structure, platform,

or stage, always check that the latter can support the total weight of the array. As a general rule, L-ACOUSTICS®

recommends the use of safety straps at all times.

11. Take into account the wind effects on dynamic load

When a loudspeaker assembly is deployed in an open air environment, wind can produce dynamic stress to the

rigging components and suspension points. If the wind force exceeds 6 bft (Beaufort scale), lower down and/or

secure the loudspeaker array.

ARCS®II SYSTEM

rigging manual

VERSION 1.1

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SYMBOLS

The following symbols are used in this document:

DANGER

This symbol indicates a potential risk of harm to an individual or damage to the product. It can also notify the

user about instructions that must be strictly followed to ensure safe installation or operation of the product.

OBLIGATION

This symbol notifies the user about instructions that must be strictly followed to ensure proper installation or

operation of the product.

INFORMATION

This symbol notifies the user about complementary information or optional instructions.

WELCOME TO L-ACOUSTICS®

Thank you for choosing the L-ACOUSTICS®ARCS®II SYSTEM.

This document contains essential information on rigging the system properly and safely. Carefully read this document in

order to become familiar with these procedures.

As part of a continuous evolution of techniques and standards, L-ACOUSTICS®reserves the right to

change the specifications of its products and the content of its document without prior notice.

Please check the L-ACOUSTICS®web site on a regular basis to download latest updates for documents and software:

www.l-acoustics.com.

CONTENTS

1RIGGING SYSTEM 5

1.1 Loudspeaker enclosures..............................................................................................................................................................5

1.2 Rigging elements..........................................................................................................................................................................5

1.3 Software application....................................................................................................................................................................5

1.4 Accessories..................................................................................................................................................................................5

2MECHANICAL SAFETY 7

2.1 Maximum configurations .............................................................................................................................................................7

2.2 Assessing mechanical safety.........................................................................................................................................................7

3SYSTEM SET-UP 8

3.1 Ground-stacking..........................................................................................................................................................................8

3.2 Flying ...........................................................................................................................................................................................8

4RIGGING PROCEDURES 9

A. Assembling an array with ARCOUPL bars ..................................................................................................................................9

B. Installing the BUMP3 rigging bar(s) ...........................................................................................................................................11

C. Installing the LIFTBAR rigging bar .............................................................................................................................................12

D. Installing the ARCBUMP flying frame ........................................................................................................................................13

E. Preparing the BUMP3/ARCOUPL assembly .............................................................................................................................15

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1 RIGGING SYSTEM

The system approach developed by L-ACOUSTICS®consists in providing packaged solutions for loudspeaker system in

order to guarantee the highest and most predictable level of performance at any step: modeling, installation, and

operation. An L-ACOUSTICS®loudspeaker system is the set of components available to form any loudspeaker system

based on one of the full-range loudspeaker enclosure afforded by L-ACOUSTICS®. It includes enclosures, rigging

accessories, loudspeaker cables, amplified controllers, and software applications.

The main components involved in the rigging process of the ARCS®II SYSTEM are the following:

1.1 Loudspeaker enclosures

ARCS®II

Full range 2-way active enclosure, arrayable in a constant curvature line,

provided with 2 ARCOUPL bars and 4 D-shackles Ø12mm

SB28

High power subwoofer enclosure

1.2 Rigging elements

BUMP3

Bar for flying a horizontal array of 2 or 4 ARCS®II,

provided with1 D-schackle Ø18mm, 2 pierced bolts, 2 nuts and 2 pins

LIFTBAR

Bar for flying a horizontal array of 1, 3, 5 or 6 ARCS®II enclosures,

provided with2 D-schackle Ø18mm and 2 D-schackle Ø22mm,

(to be used with 2 BUMP3)

ARCBUMP

Frame for flying a vertical array of up to 4 ARCS®II,

provided with 2 ARCOUPL bars, 4 D-shackles Ø12mm, 2 D-schackle Ø18mm,

6 safety slings 42mm and 6 safety slings 155mm.

1.3 Software application

SOUNDVISION

Proprietary 3D acoustical and mechanical modeling software

1.4 Accessories

ARCSPLA

Removable front dolly board for moving the enclosure and protecting the enclosure front grill

during transportation and storage

ARCSCOV

Protective cover for transportation and storage

Other ARCS®II SYSTEM components

All the other components of the system are presented in the ARCS®II SYSTEM user manual, document

intended to describe the operating modes and the loudspeaker connection.

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rigging manual

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Main components involved in the rigging process of ARCS®II SYSTEM

BUMP3

ARCOUPL

SB28

SOUNDVISION

ARCBUMP

ARCS®II

ARCSPLA

LIFTBAR

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2MECHANICAL SAFETY

2.1 Maximum configurations

The ARCS®II rigging system has been designed to comply with BGV-C1 (2012) and EN ISO 12100-1 (2004) when flying

the following arrays:

Horizontal

Vertical

With 1 BUMP3

With 2 BUMP3

and 1 LIFTBAR

With ARCBUMP

and 1 pick-up point

With ARCBUMP

and 2 pick-up point

2 or 4 ARCS®II

1, 3, 5 or 6 ARCS®II

Up to 3 ARCS®II

Up to 4 ARCS®II

Mechanical safety of the shackles

The D-shackles Ø12mm, Ø18mm and Ø22mm provided by L-ACOUSTICS®have a working load limit (WLL)

of respectively 630 kg, 1250 kg, and 2000 kg with a 6:1 safety factor. These ratings are in accordance with

BGV-C1 (2012) recommendations when implementing the maximum configurations authorized by

L-ACOUSTICS®.

Mechanical safety of the rigging system

Authorized configurations indicate the maximum number of enclosures which can be safely arrayed without

the need for SOUNDVISION modeling. For more enclosures, model the system in SOUNDVISION and

check the Mechanical Data section for any stress warning or stability warning.

2.2 Assessing mechanical safety

In order to assess the actual safety of any array configuration before implementation, refer to the following warnings:

Rated working load limit (WLL) is not enough

The rated WLL is an indication of the element resistance to tensile stress. For complex mechanical systems

such as loudspeaker arrays, WLLs cannot be used per se to determine the maximum number of enclosures

within an array or to assess the safety of a specific array configuration.

Mechanical modeling with SOUNDVISION

The working load applied to each linking point, along with the corresponding safety factor, will depend on

numerous variables linked to the composition of the array (type and number of enclosures, splay angles) and

the implementation of the flying or stacking structure (number and location of flying points, site angle). This

cannot be determined without the complex mechanical modeling and calculation offered by SOUNDVISION.

Assessing the safety with SOUNDVISION

The overall safety factor of a specific mechanical configuration always corresponds to the lowest safety factor

among all the linking points. Always model the system configuration with the SOUNDVISION software and

check the Mechanical Data section to identify the weakest link and its corresponding working load. By

default, a stress warning will appear when the mechanical safety goes below the recommended safety level.

Safety of ground-stacked arrays in SOUNDVISION

For ground-stacked arrays, a distinct stability warning is implemented in SOUNDVISION. It indicates a

tipping hazard when the array is not secured to the ground, stage or platform. It is user responsibility to

secure the array and to ignore this warning.

Consideration must be given to unusual conditions

SOUNDVISION calculations are based upon usual environmental conditions. A higher safety factor is

recommended with factors such as extreme high or low temperatures, strong wind, prolonged exposition to

salt water, etc. Always consult a rigging specialist to adopt safety practices adapted to such a situation.

ARCS®II SYSTEM

rigging manual

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3SYSTEM SET-UP

Dismantling an array

Apply the associated set-up procedure in reversed order.

ARCS® II enclosure orientation within the array

Due to the asymmetrical coverage of the ARCS®II enclosures, their orientation within an array will determine

the extended coverage direction.

Horizontal array From behind

Vertical array From behind

Connexion panel

Coverage

Connexion panel

Coverage

40° up/ 20° down

Left

40° left / 20° right

Down

40° down / 20° up

Right

40° right / 20 ° left

3.1 Ground-stacking

Horizontal

Horizontal stacked on SB28

Assemble the array

Refer to PROCEDURE A

Stack an SB28 array

Assemble the array on top

of the SB28 array

Refer to PROCEDURE A

3.2 Flying

Horizontal

Assemble the array under the motor location

Refer to the PROCEDURE A

Follow-up 1: 2 or 4 ARCS®II enclosures

Follow-up 2: 1, 5, 3 or 6 ARCS®II enclosures

Install one BUMP3

Refer to PROCEDURE B

Check that all the shackles

are tightened securely

Attach the motor hook to

the BUMP3 shackle

Raise the array

Install two BUMP3

Refer to PROCEDURE B

Install one LIFTBAR

Refer to PROCEDURE C

Check that all the shackles

are tightened securely

Attach the motor hook to

the LIFTBAR shackle

Raise the array

Vertical

Assemble the array under the motor location

Refer to PROCEDURE A

Install the ARCBUMP

Refer to PROCEDURE D

Check that all the shackles are tightened securely

Attach the motor hook to the ARCBUMP shackle(s)

Raise the array

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4RIGGING PROCEDURES

A. Assembling an array with ARCOUPL bars

Place all ARCS®II enclosures.

a. Tip the enclosures to a vertical position, side-by-side, by using the handles of the enclosures.

Specific to horizontal arrays

Place the enclosures so that the line source will provide the intended coverage pattern.

Upward coverage Downward coverage

b. Detach the ARCSPLA dolly boards, by removing the O-ring safety pins from the ARCS II®hitching pins.

Injury hazard

Pay close attention when removing the safety pins so as not to pinch your fingers.

Attach adjacent enclosures by using ARCOUPL bars.

a. Adjust the position of the ARCS® II enclosures so that the rails are aligned.

b. Remove one shackle at one end of each coupling bar.

c. Slide ARCOUPL bars into all adjacent rails, from the rear of the array (top and bottom).

d. Secure the ARCOUPL bars, by re-attaching the shackle on the front end of the bars.

Specific to flown vertical arrays

Anticipate the securing of the vertical array. Do not lock the ARCOUPL shackles, as it will be

necessary to install safety steels between all adjacent shackles.

Specific to flown horizontal arrays

Anticipate the next procedure. Keep one or two free locations for the BUMP3/ARCOUPL assemblies.

Required number and position of BUMP3

1 BUMP3 for 2 or 4 ARCS®II

2 BUMP3 for 1, 3, 5 or 6 ARCS®II

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rigging manual

VERSION 1.1

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PROCEDURE A : Assembling an enclosure array

a

Enclosures placed at the rigging position

b

A safety pin being removed to detach the dolly-board

a

Adjacent rigging rails aligned

b

The front shackle being removed from an ARCOUPL bar

c

An ARCOUPL bar being slid from the rear of the array

d

An ARCOUPL bar being secured (schackle Ø12mm)

END

The ARCS®II assembly ready for the next procedure

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