Page 14 of 18 RD0465(A) JFL SERIES OWNER’S MANUAL
Figure 6.3.4
6.3.2 A Note On Eyebolts
Load-rated eyebolts are commonly used with threaded suspension points. Eyebolts used with
JFL210 and JFL118 loudspeakers must posses the following attributes:
•
Type:
Shoulder pattern
•
Thread Size:
M10 x 1.5
•
Shank Length:
Minimum 35 mm
•
WLL:
Minimum 740 kg / 1628 lb
CAUTION:
Eyebolt Working Load Limits are significantly de-rated when angular
lifts are applied. If an application requires an angular lift greater than 45 degrees a
swivel hoist ring or similar fitting must be used – see
Figure 6.3.2
for an example.
These fittings have full swivel and pivot action, which helps avoids side loads.
6.3.3 Permanent Installation Overview
The JFL210 and JFL118 enclosures may be suspended in a permanent installation without the
accessory FB121 Fly Bar. In these applications user-supplied M10 x 1.5 x 35 mm forged shoulder
eyebolts or load-rated equivalent are installed in an array’s top and bottom enclosures. The top
eyebolts are used for primary suspension and to set the array trim height, while the bottom
eyebolts are used as pullback points to set the array tilt angle.
The following instructions pertain specifically to eyebolt installation and array handling when using
said eyebolts. Join enclosures within an array by following the procedures described in the
accompanying
FB121 Rigging & Ground Stack Instructions.
6.3.4 JFL210
Arrays
a. Using a 6 mm Allen wrench, remove the two (2) flat head screws from
the top panel of the uppermost array enclosure. These screws are
immediately adjacent to the side Rigging Tubes – see
Figure 6.3.1.
b. Thread two (2) user-supplied M10 x 1.5 x 38 mm forged shoulder
eyebolts through the exposed mounting points, making sure the eyebolt
shoulders are firmly seated against the enclosure. Orient each eyebolt so
that the load will be applied within the plane of the eye.
c. Attach the hoist mechanism and cables to the eyebolts with user-
supplied Screw Pin Anchor Shackles. Minimum allowable Shackle size is
0.75 T, 9 mm / 0.31 in.
d. Hoist the array such that the bottom array enclosure is set to a
comfortable working height.
e. Using a 6 mm Allen wrench, remove the two (2) flat head screws from the bottom panel of the
lowest array enclosure.
f. Thread two (2) user-supplied M10 x 1.5 x 38 mm forged shoulder eyebolts through the
exposed mounting points, again making sure the eyebolt shoulders are firmly seated against
the enclosure. Orient each eyebolt so that the load will be applied within the plane of the eye.
g. Attach the pull back mechanism and cables to the eyebolts with user-supplied Screw Pin
Anchor Shackles. Minimum allowable Shackle size is 0.75 T, 9 mm / 0.31 in.
h. Choose a target array tilt angle as guided by
JFLWizard
software. Hoist the array to its
desired trim height using the front point. Once trim is achieved, use the rear point to set the
array tilt angle. See
Section 6.3.7
“Setting Array Tilt Angle” below for guidance.
Figure 6.3.2
