Installation Site; Covering Heights; Foundation; Trench - Graf PLATIN XXL 20.000 Notice D'installation Et D'entretien

5.1

Installation site

The extinguishing water extraction point must be outside the debris zone of buildings. Access for the fire
brigade should be provided to the extraction point from the public road. The access route must meet the
requirements of DIN 12090 provided these don't contradict local requirements. Exceptions require the
agreement of the body responsible for fire protection.
5.2

Covering heights

Please note that the telescopic lorry dome shaft contained in the standardised scope of supply (cover in
accordance with DIN 3223 - to be provided by the customer) refers to a general coverage height of
750-1050 mm. If a different level of soil cover is needed, corresponding extension sleeve pieces must be
ordered to extend it (note: max. soil cover 1500 mm).
Depending on installation and/or final finished height of the extinguishing water suction connection, the
intake pipe extension sleeve supplied has to be adapted individually and/or ordered separately in the
desired special length. When positioning, please note DIN 14244.
5.3

Foundation

The following criteria must be verified prior to installation:
The structural suitability of the soil in accordance with DIN 18196
Maximum groundwater levels/ drainage of the subsoil
Types of loading present, e. g. traffic load
A soil survey should be requested from the local building authority to determine the physical properties of
the soil.
5.4

Trench

To ensure that sufficient space is available for working, the base area of the trench must exceed the
dimensions of the tank by > 100 mm on each side; the distance from solid constructions must be at least
1000 mm.
If the depth of the trench is > 1250 mm an embankment must be designed according to DIN 4124. The
construction site must be horizontal and plane and must guarantee sufficient load-bearing capacity.
The depth of the trench must be dimensioned so that the max. earth coverage (see point 2 – installation
conditions) above the tank is not exceeded. To use the system throughout the entire year, it is necessary
to install the tank and those parts of the system which conduct water in the frost-free area. The frost-free
depth is usually approx. 600 mm – 800 mm; precise information in this regard can be obtained from the
responsible authority.
A layer of compacted, round-grain gravel (grain size 8/16, thickness approx. 100 - 150 mm) is applied as
the foundation.
5.4.1 Slope, embankment, etc.
On installation of the tank in the immediate vicinity
(< 5 m) of a slope, earthen mound or slope, a
statically calculated supporting wall must be erected
to absorb the soil pressure. The wall must exceed the
dimensions of the tank by at least 500 mm in all
directions, and must be located at least 1000 mm
away from
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5. Installation and assembly
the tank.
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