ARCS
®
WIDE SYSTEM / ARCS
®
FOCUS SYSTEM
rigging manual
VERSION 3.0
ARCSWIFO_RM_EN_3.0
w w w . l - a c o u s t i c s . c o m
18
Attaching a WIFOLIFTBAR
PROCEDURE C
5.1.1
Description
The WIFOLIFTBAR is a rigging accessory used to fly 3 or 5 ARCS
®
WIDE/FOCUS or 6 ARCS
®
WIDE.
It is used with two WIFOLIFT that are positioned on the array depending on the number of enclosures,
WIFOLIFT p
8-9
.
The WIFOLIFTBAR is composed of a metal bar with two rows of 15 holes and 2 swivel shackles. It can be used with a
bow shackle WLL 1 t or a CLAMP250 attached to one of the two central holes. The swivel shackles can be attached the
other 28 holes to connect the WIFOLIFTBAR to the two WIFOLIFT.
5.1.2
Tilt angle definition and rigging holes choice
The tilt angle of an array is defined by the holes selected on the WIFOLIFT.
For homogeneous arrays
(ARCS
®
WIDE
or
FOCUS), refer to the
Tilt angle reference chart
on the next page to
define which WIFOLIFT holes correspond to your target tilt angle and which WIFOLIFTBAR holes to use.
For example, rigging a three ARCS
®
FOCUS array on holes n
o
1 on the WIFOLIFT yield a 26.5° positive angle and
requires attaching the swivel shackles to holes n
o
2 on the WIFOLIFTBAR.
For hybrid arrays
(ARCS
®
WIDE
and
FOCUS), a trial-and-error process must be applied to define the appropriate
WIFOLIFT and WIFOLIFTBAR holes.
The goal is to reduce the stress on the WIFOLIFT to a minimum:
-
the rigging arm and the swivel shackle must be aligned
-
the WIFOLIFT bar must remain parallel to the top of the array.
