22
VDO Fatron™ Family Safety and Installation Guide
Parallel array of 1000 mm fixtures
Parallel couplers
Warning!
Do not use parallel couplers to support the weight of
fixtures: all fixtures must be supported by sliding
brackets or half-coupler clamps as described earlier in
this chapter.
The parallel coupler available from Martin® (see “Accessories”
on page 47) let you install fixtures parallel to each other with
precise, regular spacing between fixtures.
Figure 12 shows the center-to-center spacings between
parallel fixtures that you can obtain by passing the parallel
coupler fastening screws through different combinations of
holes.
Screws for fastening the parallel coupler to fixtures are
supplied with each coupler.
Creating an array
To create an array of 1000 mm VDO Fatron fixtures installed parallel to each other using parallel couplers:
1. See Figure 13. You will need to install the following items on each fixture:
• Two sliding mounting brackets
A
(see “Sliding brackets” on page 15).
• One safety cable attachment bracket
C
(see “Safety cable attachment” on page 15).
• Two parallel couplers
B
.
You must fasten these items to the fixture either with the screws provided or with M6x10mm bolts and
self-locking nuts.
2. To install these items, pass the captive nuts or bolt heads on the items through the cutout and into the
channel on the back of the VDO Fatron in the correct order so that the items are located as shown in
Figure 13. Locate the safety cable attachment bracket
C
close to the center of the fixture and locate the
sliding brackets
A
close to the cable tails at the ends of the fixture.
3. Fasten the items to the fixture by tightening the screws provided or bolts.
4. If you are installing the array on a rigging truss or other structure, bolt a half-coupler type rigging clamp
(or a similar type that completely encircles the truss chord) securely to each sliding bracket
A
. Fasten
the rigging clamps to a rigging truss or similar structure that can securely hold the weight of the array.
5. If you are installing the array on another type of structure or surface, pass bolts through each sliding
bracket
A
and fasten the bolts to a structure or surface that can securely hold the weight of the array.
6. Secure each fixture against falling if a primary attachment fails by looping one approved safety cable per
fixture around a secure anchoring point, taking up as much slack as possible, then fastening the safety
cable to the attachment bracket
C
.
Figure 12: Parallel coupler
80
70
60
65
75
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