W+W EN 81-20 Manual De Instrucciones página 13

1.2.3 b) Mounting on a wooden cabin roof (with fixation kit):
The mounting rails are placed parallelly on the edge of the car roof
with the help of the guard rail bases and the positions for drilling are
marked.
After drilling the holes the rails can be screwed on the roof by means
of the self-locking screws and nuts. With the washers the surface
between the nut and the lower surface of the cabin ceiling can be
extended.
For a well-balanced force distribution one screw per rail has to be
placed near the car roof edge and two more in the middle of the roof.
1.2.3 c) Mounting on a hollow ceiling made of sheet steel (with fixation kit):
In the case of prefabricated cabins that are inserted it can be difficult to find a suitable guard rail fixation. A fixation
with hollow wall expansion anchors may be the best variant.
At first slide the flat irons into the mounting rails.
The mounting rails are placed parallelly on the edge of the car roof
with the help of the guard rail bases and the positions for drilling are
marked.
After drilling the holes the rails can be screwed on the roof by means
of the hollow wall anchors and flat irons. For a well-balanced force
distribution onehollow wall anchors per rail has to be placed near the
car roof edge and two more in the middle of the roof.
Important!
The flat irons always have to be
inserted, so that:
a) The hooks on the head of
the hollow wall anchors
get caught and spread
b) The minimum distance for the
expansion anchor to work is
given
Secure the nuts of the hollow wall anchors with a screw protection
device to avoid a loosening of the lock nuts at a later time.
Caution when tightening the hollow wall anchors. They can be
overwound when applying to much force.
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