Graf SICKER-BLOC COMPACT 300 Anleitung Seite 27

3. Selecting the location
Figure 2: Installation situation: Infiltration ditch module deeper
than the foundation
Figure 1: Installation situation: Foundation deeper than
infiltration ditch module
Note: If no external filter is planned, the distance between foun-
dation and infiltration ditch applies.
3.1.2 Distance to groundwater/stratum water
The thickness of the ground between the trench bed of the infiltration system and the average highest
groundwater level expected must not fall below 1 m according to work sheet DWA A-138. If this distance
does fall below one metre, it must be agreed with the relevant authorities.
3.1.3 Distance to trees
The location of the infiltration system must also take into consideration any existing and planned trees. To
avoid damage by the root system, the distance (A') between the infiltration ditch modules and trees should
correspond to the expected maximum crown diameter (A). If this is not possible, a root protection film
should be fitted to protect the system from root penetration.
Figure 3: Installation situation: Distance to trees
3.1.4 Distance to neighbouring property
A sufficient distance should be maintained from plot boundaries to avoid damage or interference to neigh-
bouring properties.
3.1.5 Installation under traffic areas and distance to public traffic areas
GRAF infiltration ditch modules are approved for installation under parking areas and private roads. How-
ever, separate conditions apply here.
The various load categories and the associated minimum earth coverages according to section 4 must be
observed!
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