Wind Loading - Electro-Voice Xlci Series Xlci-118 Rigging Manual

LC LC
X i-127, X i-127+ and X
The actual strength of the X
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 simplicity, Electro-Voice chooses to define the working-
load limit of the overall enclosures as the sum total of the weight of that enclosure plus the weight
of all of the enclosures and rigging hardware suspended below. This simplified working-load
weight rating of the overall enclosures is defined as being independent of the angles of pull on the
individual rigging points. The Electro-Voice engineers have chosen to define the working-load
limits of the individual 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 overall enclosure strength ratings are identical for the X
LC
127, X i-127+ and X
CAUTIONS for a Complex Structural Rating Analysis
WHEN APPLYING A COMPLEX STRUCTURAL RATING ANALYSIS TO ANY
X LC i LOUDSPEAKER SYSTEM SUSPENDED OVERHEAD, THE USER MUST
OBEY THE FOLLOWING RULES:
1. Never exceed the front-to-back angle limits for the front connector bar assemblies on any
enclosure. Never exceed the side-to-side angle limits for the front connector bar
assemblies on any enclosure.
2. Never exceed the front-to-back angle limits for the rear connector bar assemblies on any
enclosure. Never exceed the side-to-side angle limits for the front connector bar
assemblies on any enclosure.
3. Always make sure that all connector bars are secured to the rigging plates with the
supplied hardware on every enclosure before lifting overhead.

3.5 Wind Loading

LC
The X i loudspeaker systems have been designed to withstand winds of up to 60 miles per hour
(96.6 kilometers per hour) if the bottom cabinet is rigidly secured. For obvious safety reasons,
Electro-Voice urges the user not to suspend any loudspeaker systems overhead outdoors when
high winds are expected. When suspending X
strongly encouraged to rigidly tie off the bottom cabinets in all arrays as a safety precaution
against unexpected high winds.
A pull-up grid with an attached strap may be used to secure the bottom cabinets. The tie-off
assembly must have a working-load rating of 2,000 lb (907 kg). A ratchet strap with a 2,000-lb
working-load rating must be used for the pull-up assembly.
23
LC
i-118 Overall Enclosure Structural-Strength Ratings
LC i enclosures will depend on the complex total of the combined forces
LC
i-118, and are shown in Figure 11.
LC
i loudspeaker systems outdoors, the user is
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LC TM
ELECTRO-VOICE X i Rigging Manual
LC
i-