TerraDrain® Sheet 56/2 prefabricated drains are constructed using a perforated, formed polystyrene drainage core with a nonwoven filter fabric bonded to both sides. The filter fabric prevents soil intrusion into the flow channels while allowing water to freely enter the drain core from both sides.
TerraDrain® Sheet 56/2 products are designed for subsurface, double-sided drainage applications requiring a moderate compressive strength and flow capacity. TerraDrain® Sheet 56/2 is available with filter fabrics meeting AASHTO M 288-06 specifications.
All values provided are intended for rapid comparison purposes, only. Please refer to a specific product’s Product Data Sheet (PDS) and the disclaimers therein for a detailed listing of all characteristics, associated definitions and values needed for structure design, specification compliance review and product submittal purposes. Please Download PDS for all information transfer, printing and submittal purposes.
| Property | Test Method | English | Metric |
|---|---|---|---|
Fabric |
|||
|
Material
1
|
PP | PP | |
|
Water Flow Rate
|
ASTM D4491 | 110 gpm/ft2 | 4483 Lpm/m2 |
|
Grab Tensile Strength
|
ASTM D4632 | 160 lbs | 0.712 kN |
|
CBR Puncture Resistance
|
ASTM D6241 | 450 lbs | 2.00 kN |
|
Apparent Opening Size
|
ASTM D4571 | 70 US Std. Sieve | 0.210 mm |
|
Permittivity
|
ASTM D4491 | 1.8 sec-1 | 1.8 sec-1 |
|
Grab Elongation
|
ASTM D4632 | 70 % | 70 % |
|
UV Resistance
|
ASTM D4355 | 70 % @ 500 hrs | 70 % @ 500 hrs |
|
AASHTO M 288-06
2
|
Survivability | Class 2 | Class 2 |
Core |
|||
|
Material
1
|
PP/HIPS | PP/HIPS | |
|
Thickness
|
ASTM D1777 | 0.25 in | 6.35 mm |
|
Compressive Strength
|
ASTM D1621 | 11000 lbs/ft2 | 527 kPa |
|
Flow Rate
3
|
ASTM D4716 | 12.5 gpm/ft | 155 Lpm/m |