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US 700

US 700/720/740DB

Prefabricated Drainage Composite

US 700DB consists of a high flow, dimpled drainage core formed from a heavy duty impermeable polymeric sheet cuspated under heat and pressure, then bonded to a layer of woven filter fabric. The filter fabric retains soil and sand particles or freshly placed concrete or grout, allowing filtered water to pass into the drainage core.

US 720DB includes the addition of a protection sheet bonded to the back side of the core for soft membrane waterproofing systems. US 720DB is compatible with waterproofing systems without the use of a protection board.

US 740DB has the same core as 700 but bonded to a layer of 4 oz/sy non-woven filter fabric.

US 760DB has the same core as 700 but bonded to a layer of 6 oz/sy non-woven filter fabric.

US 780DB has the same core as 700 but bonded to a layer of 8 oz/sy non-woven filter fabric.

Property Test Method English Metric
Thickness - Core ASTM D-1777 0.4 in 1.016 cm
Compressive Strength - Core ASTM D-1621 21000 p/f² 1005 kN/m²
Flow - Fabric 740 ASTM D-4491 140 g/min/f² 5704 l/min/m²
Flow - Core ASTM D-4716 23 g/min/ft 286 l/min/m
Flow - Fabric 700/720 ASTM D-4491 145 g/min/f² 5907 l/min/m²
Flow - Fabric 760 ASTM D-4491 110 g/min/f² 4482 l/min/m²
CBR Puncture - Fabric 700/720 ASTM D-6241 675 lbs 3004 kN
Flow - Fabric 780 ASTM D-4491 95 g/min/f² 3870 l/min/m²
CBR Puncture - Fabric 740 ASTM D-6241 250 lbs 1113 kN
Apparent Opening Size - Fabric 700/720 ASTM D-4751 40 USSieve 0.42 mm
CBR Puncture - Fabric 780 ASTM D-6241 500 lbs 2224 kN
CBR Puncture - Fabric 760 ASTM D-6241 410 lbs 1825 kN
Apparent Opening Size - Fabric 740 ASTM D-4751 70 USSieve 0.21 mm
Apparent Opening Size - Fabric 760 ASTM D-4751 70 USSieve 0.21 mm
Grab Tensile - Fabric 700/720 ASTM D-4632 365 x 200 lbs 1624 x 890 kN
Grab Tensile - Fabric 760 ASTM D-4632 160 lbs 1005 kN
Apparent Opening Size - Fabric 780 ASTM D-4751 80 USSieve 0.18 mm
Grab Tensile - Fabric 740 ASTM D-4632 100 lbs 0.445 kN
Grab Tensile - Fabric 780 ASTM D-4632 205 lbs 0.912 kN
  • (1) At the time of manufacturing. Handling, storage, and shipping may change these properties.
  • (2) Maximum average roll value (MaxARV).
  • (3) Historical reference values. These properties are no longer recognized by ASTM or AASHTO for geosynthetics.

US 700/720/740DB Shipping & Packaging Information

Roll Size Roll Diameter Roll Width Roll Weight Rolls per Trailer
4' x 50' 20" 4' 50 lbs 265

US 700/720/740DB Installation and Use Instructions

This information is provided for reference only and is not intended as a warranty or guarantee. US Fabrics assumes no liability in connection with the use of this information.