Flat Drain - TerraFlow 100 Specifications

TerraFlow 100 geocomposite subsurface collector-drains are prefabricated using a specially-designed interior core member, configured to provide water flow areas, and supports for a tightly-fit, encapsulating non-woven geotextile wrapping.
The non-woven geotextile fully encloses the core member, and is fully sealed at the lap seam. The interior core member is nominally 1" thick, with a minimum compressive strength of 2,600 pounds per square foot at 10% deflection, when tested in accordance with ASTM D1621.
Minimum core width is 6 inches. Core material is virgin high-density polyethylene, conforming to ASTM D1248 (Type III), with suitable colorants and additives to provide protection against ultraviolet degradation during storage and installation. The drain core has cuspations projecting from a flat, perforated base in a uniformly spaced linear pattern.

The assembled TerraFlow 100 collector-drain provides free groundwater inflow through the geotextile outerwrap into the drain interior. The core provides a minimum of 70% unobstructed inflow surface area on the primary side of the drain. The non-woven needlepunched geotextile shall have the following minimum values:

Property	Minimum Value	Test Method
Weight	4.0 ounce/square yard	ASTM D3776
Thickness	55 mils	ASTM D1777
Grab Strength	95 pounds	ASTM D4632
Grab Elongation	50%	ASTM D4632
Trap. Tear Strength	40 pounds	ASTM D4533
Puncture Resistance (5/16")	45 pounds	ASTM D4833
Mullen Burst Strength	180 pounds	ASTM D3786
Vertical Water Flow (2")	170 gpm/square foot	ASTM D4491
Coefficient of Permeability	.20 cm/second	ASTM D4491
AOS / U.S. Sieve No.	70 - 100	ASTM D4751

Waterproof Tape used for sealing TerraFlow subsurface drain joints and connections is the equivalent of type PC-628 waterproof TerraFlow tape, having a rubber impregnated vinyl coated backing with a high tack natural rubber adhesive. Tape meets the following average roll physical properties and performance characteristics:

Physical Characteristic	Unit	Value
Thickness	mils	13
Tensile Strength	lbs./inch width	45
Elongation	%	4
Elmendorf Tear	grams	500
Adhesion to Stainless Steel	oz./inch width	65
Adhesion to Backing	oz./inch width	35
Adhesion to Kraft Paper	oz./inch width	24

Smooth Wall Pipe, when specified for trunk drains, is solid-wall without perforations through the pipe wall(s) and have a smooth interior surface. Flexible, coilable pipes with corrugated inner wall surfaces are not acceptable. Pipes may be manufactured from PVC or ABS resins, and be provided in uniform, straight lengths
- PVC pipe must conform to ASTM D3034 for single-wall pipe and ASTM F949 for double-wall pipe with smooth interior (Contech D-2000 Drainage Pipe)
- ABS pipe must conform to ASTM D2751 for solid-wall pipe and to ASTM D2680 for composite pipe
- Solid-wall pipes shall be SDR 35 or stronger
- Required fittings must be manufactured of the same polymer (PVC or ABS) as used for pipe production
Drainage backfill sand meets the criteria for fine aggregate listed in ASTM C33 Standard Specification for concrete aggregate with a maximum 5% fines content (passing #200 sieve). Additionally, the backfill material must be dust free (washed) to insure maximum drainability

Jensen Sales Company, 8980 S. Santa Fe Drive, Littleton, Colorado 80125, USA
Phone: (303) 791-4250 Fax: (303) 791-2636 e-mail: info@jensensalescompany.com
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