L-Acoustics SB18 IIi, Owner'S Manual

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Mechanical safety
Mechanical safety
Flown congurations
The SB18 IIi 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.
SB18 IIi
conguration rigging accessory safe limit maximum limit
KARAIIi-BUMP + rigging plates 12 16
Flown
KARAIIi-BUMP + M-BARi + rigging
plates
8 16
Flown with pullback KARAIIi-RIGBAR × 2 + rigging plates 4 6
Ceiling-mounted KARAIIi-FIXB rigging plates 2
Other congurations
For other congurations, respect the recommended maximum limit for optimal stability.
SB18 IIi
conguration rigging accessory safe/maximum limit
Stacked KARAIIi-FIXBRACKET (optional) + rigging
plates
4
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
SB18 IIi owner's manual (EN) version 1.0 21