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ELECTRO-VOICE
®
X-Line Very Compact
TM
Rigging Manual
3.6 XLD Grid, XLE Grid, CBEAM, and AGCD Complex Structural-Strength Ratings
XLD Grid and XLE Grid Complex Structural-Strength Ratings
The XLD Grid can be used to suspend a column of XLD281 or XS212 loudspeaker systems, while
the XLE Grid can only be used to suspend a column of XLE181 loudspeaker systems.
The structural strength of a column of loudspeakers suspended from a grid is a function of the
strength of the grid spreader bar assemblies, the grid sidearm assemblies, the front and back
rigging attachment to the XLVC enclosures, the strength of all of the quick-release attachment
pins, the loudspeaker array configuration and the vertical tilt angle of the grid. This is a complex
mechanical system, where the strength of the overall system is determined by the strength of the
weakest component in the system.
The Electro-Voice engineers have designed the XLVC grids to be stronger than the XLVC
loudspeaker systems over the entire mechanical operating range of the loudspeaker systems.
This makes the structural analysis of the overall system (grids and loudspeaker enclosures) much
easier because the structural rating of the entire mechanical system will be determined solely by
the structural strength of the loudspeaker systems.
Figure 15a:
XLD GRID Complex Structural Ratings
44
Figure 15b:
XLE GRID Complex Structural Ratings
When Using the Grid in Any of the Configurations Shown to Support a Column of Loudspeaker Systems, the
Structural Rating of the Grid Will Always Exceed the Structural Rating of the Loudspeaker Systems for any
Vertical Tilt Angle. Thus, If the Structural Rating Is Not Exceeded for Any Loudspeaker in the Column, the
Structural Rating of the Grid Will Not Be Exceeded. When Using Two Pick-Up Points to Suspend a Grid, Do Not
Exceed the Angles Shown