Graf EcoLoop SP 1100 DN 200 Installation And Servicing page 24

Please note: The maximum earth covering of
4 m must not be exceeded.
In case of car traffic, an appropriate cover ac-
cording to EN 124 class B must be used. In
addition, the telescopes must also be provided
with a concrete collar. The earth covering must
be between 400 and 1000 mm.
If the system is not going to be driven over, the
distance to areas that can be driven on must
correspond with the depth of the pit.
3 Installation conditions
The GRAF EcoLoop SP can only be installed in
groundwater and stratum water to a limited ex-
tent. Please refer to point 5.7 of these instruc-
tions.
In case of heavy goods vehicle traffic, an appro-
priate cover according to EN 124 class D must
be used. In addition, a load distribution plate
must be provided by the customer (load bearing
capability plans available from Otto Graf GmbH).
The earth covering must be between 700 and
1200 mm.
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