Mechanical Safety; Maximum Configurations; Assessing Mechanical Safety - L-Acoustics ARCS WIDE SYSTEM Rigging Manual

ARCS ARCS ARCS ARCS WIDE SYSTEM / ARCS WIDE SYSTEM WIDE SYSTEM WIDE SYSTEM
®
rigging manual rigging manual
rigging manual rigging manual
VERSION 1.0
2 2 2 2 MECHANICAL

MECHANICAL SAFETY

MECHANICAL MECHANICAL
2.1

Maximum configurations

®
The ARCS WIDE/FOCUS rigging system has been designed to comply with BGV-C1 (2012) and EN ISO 12100-1
(2004) when implementing the following arrays:
Horizontal
Ground-
®
n ARCS WIDE/FOCUS
stacking
Ratio of
®
Flying 4 ARCS WIDE/FOCUS
for 1 WIFOLIFT bar
Mechanical safety of the shackles
The bow shackles Ø12mm
safety factor. This rating is in accordance with BGV-C1 (2012) recommendations when implementing the
maximum configurations authorized by L-ACOUSTICS
Mechanical safety of the rigging system
Maximum 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.
ARCSWIFO_RM_EN_1-0
ARCS ARCS ARCS
SAFETY
SAFETY SAFETY
2 ARCS
With WIFOBUMP
®
8 ARCS WIDE/FOCUS
or
®
4 ARCS WIDE/FOCUS and 2 SB18m
or
8 SB18m
provided by L-ACOUSTICS
w w w . l - a c o u s t i c s . c o m
FOCUS FOCUS SYSTEM FOCUS FOCUS SYSTEM SYSTEM SYSTEM
®
Vertical
®
WIDE/FOCUS on top of 2 SB18m
With WIFOBUMP and CLAMP250
6 ARCS
®
2 ARCS WIDE/FOCUS and 1 SB18m
®
have a working load limit (WLL) of 1000 kg with a 6:1
®
.
®
WIDE/FOCUS
or
or
4 SB18m
6 6 6 6