3.1.4.1 Lawn Track or RASENGLEIS system
The Lawn track system consists of a water permeable concrete slab 30 cm thick and two longitudinal reinforced concrete beams of trapezoidal shape (cross section) which are connected onto the concrete bearing layer which supports and reassure the stability of the track (Lichtberger, Franz). Anchoring ties connect the longitudinal concrete beams and the concrete supporting layer (CBL) as shown in figure 51. The rail fastenings are fastened onto the longitudinal concrete beams by rail clamps cast in pre-drilled holes. The space between the concrete beams and their outer areas is filled with a substrate covered by oligotrophic grass (low vegetation) (Lichtberger).
Figure 51: Lawn track or RASENGLEIS construction (Darr & Fiebig)