Electro-Voice XLC 127, Руководство по монтажу

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Electro-Voice XLC Touring Addendum 23
3. Rigging Strength Ratings/Safety Factors/Special Considerations
XLC-EB Complex Structural-Strength Ratings
The XLC-EB is used as an extender beam with a single column of XLC127, , XLC127DVX, XL-
C907DVX, XLC118 and XLC215 loudspeaker systems to enable greater vertical angle tilt of the column
than that which could be achieved with a grid alone.
The structural strength of the of a column of loudspeakers suspended from a XLC-EB is a function of
the strength of the beam frame assembly, the beam yoke assemblies, the beam ring assemblies, the grid
spreader bar assemblies, the grid sidearm assemblies, the front and back rigging attachment to the XLC
enclosures, the strength of all of the quick-release attachment pins, the loudspeaker array configuration
and the vertical tilt angle of the beam. 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 XLC-EB to be stronger than the XLC A1 and B1 grids,
which are in turn stronger than the XLC loudspeaker systems over the entire mechanical operating range
of the loudspeaker systems. This makes the structural analysis of the overall system (beam, 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.
Specifically, this means that, when the XLC-EB is used in any of the configurations shown in Figure 7, the
structural rating of the beam will always exceed the structural ratings of either the XLC loudspeaker sys-
tems. Thus, if the structural rating is not exceeded for any loudspeaker in the column, the structural rating
of the beam will not be exceeded.
When suspending a XLC-EB, the maximum included angle of the pickup points relative to the beam
shown in Figure 7 must not be exceeded. Note that the maximum angle for the pickup rings is less for
holes 1 and 23 because the pickup rings will contact the spacer bars at greater angles.
Figure 7:
XLC-EB Extender Beam complex structural ratings
Single Ring Hang -
Hole #1
Single Ring Hang -
Holes #2-22
Single Ring Hang -
Hole #23
Dual Ring Hang -
For any hole combination