US 840 is a woven high tenacity monofilament filtration geotextile made of 100% polypropylene yarns. This product is specifically designed for drainage and filtration applications. This product's Percent Open Area of 8%, gives it excellent hydraulic properties and high flow rates, while reducing the chances of clogging. US 840 meets the following M.A.R.V. values except where noted:
| PROPERTY |
TEST METHOD |
ENGLISH |
METRIC |
| Weight - Typical |
ASTM D-5261 |
7.0 oz/sy |
237 g/sm |
| Tensile Strength |
ASTM D-4632 |
425 x 350 lbs |
1,891 x 1,588 N |
| Elongation @ Break |
ASTM D-4632 |
20% |
20% |
| Mullen Burst |
ASTM D-3786 |
690 psi |
4,757 kPa |
| Puncture Strength |
ASTM D-4833 |
150 lbs |
730 N |
| Trapezoidal Tear |
ASTM D-4533 |
150 x 125 lbs |
667 x 560 N |
| Apparent Opening Size |
ASTM D-4751 |
40 US Sieve |
0.425 mm |
| Permittivity |
ASTM D-4491 |
0.95 Sec-1 |
0.95 Sec-1 |
| Water Flow Rate |
ASTM D-4491 |
70 g/min/sf |
2,852 l/min/sm |
| Percent Open Area |
CW-02215 |
8% |
8% |
| UV Resistance @ 500 Hours |
ASTM D-4355 |
90% |
90% |
| ROLL SIZE |
AREA |
WEIGHT |
| 12.91' x 300' |
431 sys |
248 lbs |
Spec Interpretation
