Yamaha IF2115 Manuale - Pagina 9
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10. Check the structure prior to mounting
Check the structure to be mounted from (ceiling, roof beam etc). If in any doubt whatsoever,
c
onsult a suitably qualified structural engineer.
11. Use of Eye bolts
The eye bolts supplied with your Yamaha Installation Series speakers are not common eye
bolts that you would find at your local hardware store. The supplied eye bolts are actually
hardened, load-rated lifting eyes and are much stronge
s
ubstitute. Use only M10 x 38mm hardened lifting eyes.
Keep in mind that the strength of an eye bolt differs depending on the angle of the steel
attached to it, and the suspension angle of the speaker. The safe working limits (SWL)
Yamaha eye bolt supplied with the Installation Series are shown in the illustration below:
Use only the supplied eye bolts
Always use three or more eye bolts per cabinet for suspended applications, except when using
the optional array frames. Please refer to section 14 for proper number of eye bolts per array.
Install the eye bolts on multi
s
ingle surface (e.g. top only).
12. Selecting the correct size of wire rope
After calculating the total load required of each cable, choose the appropriate steel wire rope
as recommended by the manufacturer. We
d
ifferent territories may differ from this.
Assuming we choose 10:1 ratio for wire rope, the total flown weight (speaker/spe
p
lus hardware, cable etc) must be less than< Maximum load of the wire rope / 10
ple surfaces of the speaker (e.g. top and rear), never on just a
recommend a safety factor of 10:1. Requirements in
r than common eye bolts. Do not
of
aker array
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