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GEOTEXTILES
WOVEN STABILIZATION FABRICS
WOVEN FILTRATION FABRICS
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LIGHT WEIGHT NONWOVEN FABRICS
MEDIUM WEIGHT NONWOVEN FABRICS
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DEWATERING TUBES
EROSION CONTROL
TEMPORARY EROSION CONTROL
PERMANENT EROSION CONTROL
FILTER BAGS
GEOSYNTHETIC SEAMING
J-DRAIN COMPOSITE DRAINS
OTHER PRODUCTS
SILT FENCES
SANDBAGS
FABRIC ENCLOSURES
LANDSCAPE FABRICS
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Woven Filtration Fabrics

Monofilament filter fabric placed on a shoreline
The combination of high strength and excellent hydraulic characteristics make monofilaments the filter fabric of choice for bulkhead and erosion control. Monofilament filter fabrics have a high percent open area (POA). Percent open area is the area of distinct, uniform and measurable openings in a filter fabric. A high POA assures that both water and soil particles have direct paths through the fabric. Nonwoven, woven slit film and combination fabrics have little or no percent open area and often trap soil particles, clogging the geotextile.
To determine when a fabric becomes clogged, a gradient ratio test is performed. Gradient ratio is defined as the ratio of the average hydraulic gradient across the fabric and the 1" of soil immediately next to the fabric, to the average hydraulic gradient across the 2" of soil between 1" and 3" above the fabric.
The US Army Corp of Engineers determined that if a gradient value exceeded 3, the fabric is considered clogged. Tests were conducted to determine what geotextiles resisted clogging, based on the gradient ratio of the geotextiles. The results of 6 types of geotextiles are presented in the graph below:
Test results from U.S. Army Corps of Engineers
Woven Filtration Products

Manufactured in 6' and 12' widths. US Fabrics also provides custom widths and lengths, eliminating waste and reducing expensive overlaps. By using an over edge J Seam with a 401 lock stitch, seam strength approaches 90% of the geotextile strength.


Applications

• Bulkhead, seawall and shoreline erosion control


Products

(click for data sheets)
AASHTO Spec*
View PDF sheetUS 230  
View PDF sheetUS 670
Class 2
View PDF sheetUS 840  
View PDF sheetUS 1540  
View PDF sheetUS 2070  
Published values are historical minimum average roll values and are subject to change.   * AASHTO M288-99
  survivability level
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Helpful References
View PDF sheet Woven Filtration
Catalog Sheet
View PDF sheet Woven Filtration
Metric Catalog Sheet
View PDF sheet Standard Roll Size and Shipping Information Sheet
View PDF sheet Equivalent Products Sheet
View PDF sheet Monofilament Riprap Installation Guide

"The greater the percent open area, the better the filtration performance and resistance to clogging."

-Haliburton, T.A., Wood, P.D.

Evaluation of the U.S. Army Corps of Engineers Gradient Ratio Test for Geotextile Performance The Second International Conference on Geotextiles, Las Vegas,
U.S.A. 1982

How to Buy
Woven Filter Fabrics
To learn more about our products or to place an order, call our sales professionals at
1-800-518-2290 or email info@usfabricsinc.com
Geosynthetic Resource Center
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