X-Array™ Loudspeaker Systems
pull. The Xrss short wire-rope rigging strap, Xrsl
long wire-rope rigging strap and New Haven
NH32102-2 fitting have identical structural-
strength ratings as shown in
Figure 21
. The
ratings vary with both the side-to-side and front-
to-back angles and, therefore, are illustrated with
two graphs. The rigging straps and/or fittings have
a side-to-side range of 360°; however, the front-
to-back range is only 270° because the enclosure
prevents a full 360° rotation.
It should be clarified that all of the strength ratings
shown in
Figure 21
are for a single front rigging
point. There are, however, two front rigging points
on the enclosure – each having the structural-
strength ratings shown in
Figure 21
. The front rig-
ging strength ratings are identical for all of the
X-Array™ model enclosures.
Overall Enclosure Structural-Strength Ratings:
The actual strength of an X-Array™ enclosure will
depend on the complex total of the combined
forces from each of the rigging points acting on
the enclosure as a whole and will vary with the
array configuration. However, for the sake of sim-
plicity, Electro-Voice chooses to define the work-
ing-load limit of the overall enclosure as the sum
total of the weight of that enclosure plus the
weight of all of the enclosures and rigging hard-
ware suspended below. This simplified working-
load weight rating for the overall enclosure,
shown in
Figure 22
, is defined as being inde-
pendent of the angles of pull on the individual rig-
ging points. The Electro-Voice engineers have
chosen to define the working-load limits of the in-
dividual rigging points as a function of pull angle
so that they take into account any variations in
enclosure strength that might occur as a function
of pull angle. This approach allows the enclosure
working-load limit to be defined as independent of
pull angles, making the complex structural-rating
analysis easier. The enclosure strength ratings
are identical for all of the X-Array™ models.
CAUTIONS for a Complex Structural Rating
Analysis: WHEN APPLYING A
COMPLEX
STRUCTURAL-RATING ANALYSIS TO ANY
X-ARRAY™ LOUDSPEAKER SYSTEM SUS-
PENDED OVERHEAD, THE USER MUST OBEY
THE FOLLOWING RULES:
1. For the front of every enclosure in an array,
never exceed the working-load-versus-
angle limit for the Xrss rigging straps, the
Xrsl rigging straps or any custom rigging
straps.
2. For the back of every enclosure in an array,
never exceed the working-load-versus-
angle limit for the Xrhl linking hinges, the
Xrhg grid hinges, Xrhp pickup hinges or any
custom rigging straps.
3. Always make sure that the hinge locking
pins on every Xrhl linking hinge, Xrhg grid
hinge and Xrhp pickup hinge are fully en-
gaged in the rigging track on the back of
every enclosure (and grid, when applicable)
before lifting overhead.
4. Always make sure that the double-stud fit-
tings on every Xrss rigging strap, Xrsl rig-
ging strap or any custom rigging strap are
securely locked in the rigging track on the
front of every enclosure (and grid, when
applicable) before lifting overhead.
5. When using pull-up lines, never pull up
enough to allow the chains to go slack on
the rear Xrhg grid hinges, the Xrhp pickup
hinges or any custom rigging strap assem-
bly.
6. When using a grid, always make sure that
the grid is balanced and hangs level ±5°.
7. Only use New Haven NH32102-2 double-
stud swivel-ring fittings on the Xrss rigging
straps, Xrsl rigging straps or any custom
rigging straps.
8. Only use Xrhl linking hinges, Xrhg grid
hinges, or Xrhp pickup hinges manufac-
tured by Electro-Voice.
3.5 Special Considerations
Double-Stud Fittings: All of the X-Array™ mod-
els will accept the standard aircraft-type double-
stud fittings in the rear as well as the front rigging
tracks. Electro-Voice recommends using only the
New Haven NH32102-2 double-stud swivel-ring
fitting with X-Array™ loudspeaker systems be-
cause it is the only double-stud fitting that has a
secondary locking mechanism (an additional lock-
ing pin) that eliminates the possibility of the fitting
vibrating loose from the rigging track. In addition,
Electro-Voice recommends using the NH32102-2
double-stud fitting for attachment to the front rig-
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