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7.1. The drawing
7.3. shows details on how to attach a front hoop to existing outriggers or
to fabricated ones. All types of outrigger should be at least 4" /
100mm deep at the chassis, but on coil-sprung vehicles, the outrigger must
be as deep as possible but still provide clearance for the front
suspension radius arms.
7.2. If it is
not possible to bring the front hoop leg straight down onto an existing
outrigger, the mount may be offset by up to 4" / 100mm ahead, behind
or outboard as shown bottom right of drawing 7.3.
7.3.
(Drawing)
7.4.(Drawing)
7.5. The drawing above shows how the 4" /
100mm depth at the chassis can be achieved. The wedge must be at least
half the span of the outrigger.
7.6.
Integrated font hoop / bulkhead assembly
7.6.1. In this
variation, the front hoop side pieces turn in and are welded to the side
of the chassis. This is permissible where the front hoop forms part of an
integrated front-hoop / bulkhead assembly. The front hoop is neither cut
nor welded where it changes from being the front hoop to being a part of
the bulkhead. See next drawing.
7.6.2. This
type of structure is acceptable so long as all the provisions detailed in
the drawing are adhered to. Otherwise, box-section outriggers should be
used to support the ends of the front hoop. If the all-round hoop has been
fitted but is not part of the integrated assembly, then boxing in the
existing turned-in tube may be acceptable.
7.6.3. If the
spreader plates are not present on the chassis or additional members are
under the size shown, then an outrigger must be fitted. This can be built
up around the turned in tube as shown using 1/8" / 3mm plate as
shown. Don't forget the ¼" / 6mm spreader plate or make the top
plate of the outrigger from this thickness material.
7.6.4. (Drawing)
7.7. Range
Rover / Discovery mounting to front Outrigger.
7.7.1.
Mounting the front hoop in a Range Rover or Discovery can be difficult but
the following “top-hat” guidelines might help. This uses a standard ¼"
/ 6mm foot sitting on the floor and bolted through to the “top-hat”
underneath. The principle is the same as the rear-brace mount shown in
9.2.3. for the 90 where a box-section upstand with a flat plate on top in
used. As far as reinforcing the outrigger is concerned, add ¼" / 6mm
plates to the outrigger. These should extend inwards to the chassis. The
rule-book states that they should be 4" / 100mm deep at that point
but the front radius-arm mounts and the shallow front-face of the
outrigger itself make these dimensions hard to achieve in practice. The
side-plates and the parts of the “top-hat” could possibly be cut as
shown to simplify matters. Plate over the inside and outside of the
“top-hat” box as shown.
7.7.2. (Drawing)
7.7.3
(Drawing)
7.8. Front
Hoop Mounting to Outrigger on SI - III & 90 / 110 etc.
7.8.1. (Drawing)
7.8.2. The hoop is welded to the saddle, and
the saddle is attached to the outrigger with the high tensile outrigger /
bulkhead bolt (which also secures the bulkhead).
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