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TerraDrain® Sheet 50/2 Series

TerraDrain® Sheet 50/2 Series 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 50/2 Series products are designed for subsurface, double-sided drainage applications requiring a moderate compressive strength and flow capacity. TerraDrain® Sheet 50/2 Series products are available with filter fabrics meeting AASHTO M 288-06 specifications.


Metric Values

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 Units TerraDrain® Sheet 50/2 TerraDrain® Sheet 54/2 TerraDrain® Sheet 56/2 TerraDrain® Sheet 58/2

Fabric

Material 1
PP PP PP PP
Water Flow Rate
ASTM D4491 gpm/ft2 190 150 110 90
Grab Tensile Strength
ASTM D4632 lbs 90 130 160 205
CBR Puncture Resistance
ASTM D6241 lbs 225 360 450 600
Apparent Opening Size
ASTM D4571 US Std. Sieve 50 70 70 80
Permittivity
ASTM D4491 sec-1 2.8 2.1 1.8 1.3
Grab Elongation
ASTM D4632 % 65 70 70 70
UV Resistance
ASTM D4355 % @ 500 hrs 70 70 70 70
AASHTO M 288-06 3
Survivability Class 3 Class 2 Class 1

Core

Material 1
PP/HIPS PP/HIPS PP/HIPS PP/HIPS
Thickness
ASTM D1777 in 0.25 0.25 0.25 0.25
Compressive Strength
ASTM D1621 lbs/ft2 11000 11000 11000 11000
Flow Rate 2
ASTM D4716 gpm/ft 12.5 12.5 12.5 12.5
Product Data Sheets

  • 1   PP = Polypropylene; HIPS = High Impact Polystyrene
  • 2   In-plane flow rate measured at 3,600 psf (172 kPa) compressive load and a hydraulic gradient of 1.0.
  • 3   AASHTO Designation: M 288-06 Standard Specification for Highway Applications; American Association of State Highway and Transportation Officials, 2006. Geotextile survivability classification from installation stresses in subsurface drainage applications.


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