Mechanical Safety; Assessing Mechanical Safety - L-Acoustics KARA II DOWNFILL FOR K1 Addendum

Mechanical safety

Mechanical safety
The K1 rigging system complies with 2006/42/EC: Machinery Directive. It has been designed following the guidelines
of BGV-C1.
2006/42/EC: Machinery Directive species a safety factor of 4 against the rupture. The own deployments described in
this manual achieve a safety factor of 4 or more.
Refer to Soundvision for the safety factor of a specic deployment.
The safe limit gives the maximum number of elements for which the safety factor is compliant with the 2006/42/
EC: Machinery Directive, within the use dened in this manual and regardless of the other deployment parameters (site
angles, inter-element angles, etc.).
The maximum limit gives the maximum number of elements for which the safety factor can be compliant with the
2006/42/EC: Machinery Directive, when the other deployment parameters provide the best mechanical conditions.
For mixed arrays refer to your Soundvision model.
Always refer to Soundvision for the safety factor of a mixed array.
When ying a K1 array with a Kara II downll, the mechanical safety of all system elements must be considered.
The indicated maximum limit applies to the K1 only.
Do not implement a pullback on a K1 array with a Kara II downll.
K1
conguration
own with a downll

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.
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.
12
rigging accessory
KARA-DOWNK1
safe limit
6 Kara II
Kara II downll for K1 addendum (EN) version 1.0
maximum limit