Technical information on the fertile foundation material for emergency service access roads with O2D GREEN® pre-grassed grids and TTE® MultidrainPlus grids for grassing
Composition :
• 15 cm thickness: TP GREEN soil and stone foundation material
o 75% crushed material of particle size 20/40 mm
o 25% organic substrate (topsoil/washed sand/compost) of particle size 0/10 mm
The load-bearing level required on the soil and stone foundation material is such that EV2 > 60 MPa (EV2/EV1 < 2)
• 3 cm thickness: LP GREEN fertile bedding course
o 60% crushed material of particle size 4/6 mm
o 20 % topsoil/loam mixture of particle size 0/10 mm
o 20% sand of particle size 0/4 mm
Prepared base/sub-base (-23 cm in relation to level 0):
• The requisite permeability below this foundation system is such that K > 10-6 m/s
• The load-bearing level required is such that EV2 > 60 MPa (EV2/EV1 < 2)
• We recommend the installation of a permeable anti-contaminant geotextile membrane
This fertile foundation material composition ensures both load-bearing and drainage capabilities, and provides the requisite nutrients for the effective rooting of grass. It is recommended that the thickness of the sub-base (for example, 20/40 mm crushed drainage gravel) should be adjusted and/or any other facility should be incorporated, if the natural ground surface does not possess the requisite infiltration properties, or for the satisfaction of project design requirements. The load-bearing level should be appropriate to the intended application.
Technical information on TTE® grid
Product name:
TTE® MultidrainPlus grid
Material:
100% recycled and recyclable domestic mixed plastic – German DUAL system
Dimensions:
Approximate dimensions: length 80 x width 40 x height 6 cm (+/- 2mm), comprised of 32 cells of dimensions 8 x 8 cm (1 m² = 3.125 grids)
Colouring of grids:
Anthracite grey (variable)
Weight - unladen:
Approximately 9 kg/grid, or approximately 28 kg/m² unladen
Weight – pre-grassed:
Approximately 22 kg/grid, or approximately 69 kg/m² pre-grassed
Surface finish:
Anti-slip ribs of thickness 2 mm
Underside:
T-profile support width of approximately 4.2 cm – 1.5 cm assembly joint on either side
Static load resistance:
10 Newtons/mm² (equivalent to 1,000 tonnes/m²)
Puncture resistance:
> 100 kN on a surface of diameter 20 cm (compliant for emergency service roadways) – GINGER CEBTP certification
Axle loading:
20 tonnes (147 kN)/unit of 4 unladen cells (20 x 20 cm) – Certified by the TÜV SUD (official German certification organization)
Technical information on TTE® concrete paving
Product name:
TTE® concrete paving
Dimensions:
Length 7.4 x width 7.4 x height 4.9 cm
Colours available:
Grey, red, anthracite, yellow stone, brown, white, green, blue, pink
Weight:
615 g/paving stone
Infill recommendation (unfilled grid)
Grassing in situ:
Pre-seeded substrate O2D SR GREEN®
3.9 
