Filter fabric use class N2 2X120 / N2 A-collection 240 M2 [3488222]

The use category of the filter fabric is selected according to the plan, or in accordance with the general quality requirements and job descriptions of the road administration for road construction work.

Subsoil Construction conditions Maximum grain size of fill material
0 < 60 mm 60 < 200 mm 200 500 mm

Soft Normal N3 N4 N5 N5
Soft Favorable N3 N3 - -
Fixed Normal N3 N3 N3 N4
Fixed Favorable N2 N2 - -

Soft subsoil = Tv, Sa (<25 kPa)
Solid subsoil = Sa, (> 25 kPa), Si, Hk, Sr

Construction conditions:
Normal if at least two of the following conditions are met: a) heavy construction traffic, b) crushed and sharp-edged fill material, c) compaction with heavy vibrating equipment.
Favorable if only one of the above conditions is met and in addition the maximum grain size of the filling material is < 200 mm.