Each Figure 13 includes a graph of the working-load weight-versus-angle limit rating for the XLVC enclosures. This working-load weight limit is applicable to every enclosure in an array, and in- cludes the weight of that enclosure plus the total weight of all enclosures, rigging hardware and cabling suspended below it. The enclosure elevation angle is the vertical angle of that enclosure, where 0° represents an upright enclosure facing straight ahead (0° elevation angle). These work- ing-Ioad-versus-angle limits take into account the complex forces generated in the front hinge bars, the rear swing arms, the quick-release pins, the rigging tubes and channels, the enclosures and the (optional) pull-up line, as a result of the complex weight distribution throughout the array.
Also included in the simplified
WHEN APPLYING THE SIMPLIFIED STRUCTURAL RATING GUIDELINES TO ANY XLVC LOUDSPEAKER SYSTEM SUSPENDED OVERHEAD, THE USER MUST OBEY THE FOLLOWING RULES:
1.Never exceed the
2.Never exceed the
3.Never exceed the
4.Always make sure that two
5.Always make sure that the
6.If a
Discussion of Array Examples: For example, if the top XLD281 enclosure in a column was angled down 55°, the enclosure
If, however, the top XLD281 enclosure in a column was angled up 55°, the total allowable weight would then only be 741 lb (336 kg) - including the weight of the top enclosure plus all of the enclo- sures and rigging suspended below. The enclosure
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