TerraDrain® Sheet 121 prefabricated drains are constructed using a formed polystyrene drainage core with a nonwoven filter fabric bonded to one side. The filter fabric is bonded to each dimple to prevent soil intrusion into the flow channels while allowing water to freely enter the drain core from one side.
TerraDrain® Sheet 121 provides additional protection for soft waterproofing membranes. The high-strength polymeric film is bonded to the flat side of the drainage core to prevent membrane intrusion into the back of the dimple.
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 | 165 gpm/ft2 | 6724 Lpm/m2 |
|
Grab Tensile Strength
|
ASTM D4632 | 100 lbs | 0.445 kN |
|
CBR Puncture Resistance
|
ASTM D6241 | 275 lbs | 1.22 kN |
|
Apparent Opening Size
|
ASTM D4571 | 70 US Std. Sieve | 0.210 mm |
|
Grab Elongation
|
ASTM D4632 | 70 % | 70 % |
|
UV Resistance
|
ASTM D4355 | 70 % @ 500 hrs | 70 % @ 500 hrs |
Core |
|||
|
Material
1
|
PP/HIPS | PP/HIPS | |
|
Thickness
|
ASTM D1777 | 0.44 in | 11 mm |
|
Compressive Strength
|
ASTM D1621 | 15000 lbs/ft2 | 718 kPa |
|
Flow Rate
2
|
ASTM D4716 | 17 gpm/ft | 211 Lpm/m |