Installation And Assembly; Subsoil; Installation Pit - 4rain FLAT 1.500 L Manual De Instalación, Montaje Y Mantenimiento


Ground earth

Cover

Shaft extension

Outer layer
5.1

Subsoil

The following points must be clarified before installation:
 The suitability of the soil for installation in accordance with DIN 18196
 The maximum groundwater levels and the seepage capability of the subsoil
For the determination of the soil physical properties an expert soil evaluation should be requested from
the local public construction authority.
5.2

Installation pit

In order to ensure that sufficient working space is available the ground area of the installation pit must
extend beyond the dimensions of the tank by > 100 mm on each side and the distance from fixed struc-
tures must be at least 1000 m.
From a pit depth of > 1250 mm a slope must be constructed in accordance with DIN 4124. The subsoil
must be flat and have sufficient load-carrying capacity.
The depth of the pit must be dimensioned so that the maximum earth coverage (780 mm above the tank
shoulder) is not exceeded. When the system is in use throughout the entire year the tank and the system
parts bearing water must be installed in a frost-free area. As a rule the frost-free depth is around 600 mm.
The responsible authority can provide more exact information about this depth.
A layer of compacted round pebble stones (max. grain size 8/16 mm (thickness 100 - 150
mm) is deposited on top.
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5.

Installation and Assembly


Enclosure (round pebble stones max. grain size
8/16 mm)
 FLAT flat tank
 Compacted sub-structure
β  DIN 4124 from 1250 mm pit depth
5. Installation and Assembly
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