Apogee APL-220, Руководство пользователя

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as when the speaker is used on its side and rigging plates are attached. In
sheer, the friction provided by tightening and preloading the bolt actually
increases the strength of the joint and decreases cyclic failure of the fastener.
Consult an experienced rigger or engineer when it comes to rig-
ging practices, methods, required materials, or other details
. The
kinetic energy from an 80 lb. object falling 40 feet onto a solid surface is truly
astounding. Injury or loss of life could occur, even to those who are not in
close proximity, let alone the injuries or deaths that may result from a pan-
icked crowd. Safety is the most important part of the job! Take the extra time
to obtain the proper rigging materials and components, or
keep the system on
the ground! All rigging fittings, slings, Spansets™, shackles, bolts, and other
equipment should be inspected carefully before each use. Questionable com-
ponents or materials should immediately be discarded where they won’t be
found and re-used by someone else. In particular, forged eyebolts, shackles,
pins, and other high-carbon steel components are susceptible to fracture if
they fall even a few feet onto a hard surface like a concrete floor.
Play it safe
and do not use any questionable components or materials!
The optional Aeroquip
™
fittings provide a convenient way to suspend the
APL-220, -500, or -800. They are available with hanging rings, studs that accept
a ‘jaw’ style attachment, and a combination of both ring and stud.
An Aeroquip fitting can sustain a straight-line-of-force load of 5000 lb. before
failure. This means that if suspended from only two Aeroquip fittings, the APL-
220, -500, or -800 will exhibit at least a
1 06: 1 safety factor. However, like the
nutplate, Aeroquip fittings de-rate rapidly as the load angle changes from
straight to oblique.
It's vitally important to be absolutely sure that any and all
methods of suspending the loudspeaker do not result in the application of exces-
sive force to either the nutplate fittings or the Aeroquip fittings in an oblique line-
of-force. Lives are at stake, possibly your own!