L-Acoustics Kara IIi, Owner'S Manual

Page: 37 / 142

Mechanical safety
Other congurations
For other congurations, respect the recommended maximum limit for optimal stability.
Kara IIi
conguration rigging accessory safe limit maximum limit
Stacked KARAIIi-FIXB rigging plates 6 9
Stacked with angle
adjustment
KARAIIi-TILTB rigging plates 6 9
SB18 IIi
conguration rigging accessory safe/maximum limit
Stacked KARAIIi-FIXBRACKET (optional) + rigging
plates
4
Kara IIi + SB18 IIi
conguration rigging accessory safe limit maximum limit
Kara IIi stacked on
SB18 IIi
KARAIIi-TILT + KARAIIi-FIXB rigging
plates
6 Kara IIi
2 SB18 IIi
9 Kara IIi
3 SB18 IIi
Assessing mechanical safety
Mechanical safety of the rigging system
Before any installation, always model the system in Soundvision and check the Mechanical Data section for
any
stress warning
or
stability warning
.
In order to assess the actual safety of any array conguration 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 specic array conguration.
Maximum pullback angle
If a pullback accessory is available, the pullback angle must not exceed a 90° negative site angle.
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 ying or stacking structure (number and location of ying 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 specic mechanical conguration always corresponds to the lowest safety factor
among all the linking points. Always model the system conguration 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 beyond 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 the user's responsibility to secure the array
and to ignore the warning.
Additional safety for own arrays
When ying an array, use available holes to implement a secondary safety.
Kara IIi owner's manual (EN) version 2.0 37