Title: Turbidity Barriers Spec Type 3.DOT
Summary:
Details:
June 2008
 
Style
ASTM
Layfield Type 3.DOT
Layfield Type 3.DOT (HD)
Water Current Limitations
Layfield Type 3.DOT Turbidity barrier are for use in waters with current up to a max. of five feet per second, in deeper lakes, streams, inter-coastal and tidal areas
Floatation Buoyancy
 
19 lbs/ft
29 lbs/ft
Floatation Size
 
8” x 8” x 4’
12” x 12” x 4’
Fabric Curtain Body
 
18 oz/yd2 Yellow Vinyl coated on a 6 oz/yd2 polyester scrim
22 oz/yd2 Yellow Vinyl coated on a 6 oz/yd2 polyester scrim
Grab Tensile
D-5043
397 x 373 lbs.
500 x 400 lbs.
Tongue Tear
D-2261
96 x 86 lbs.
132 143 lbs.
Adhesion
D-751-95 Section 43.1.2
15 lbs.
25 lbs.
Permeable Geotextile Body
Polymer
Polypropylene
Polypropylene
Weight
ASTM D-2374
7.5 oz/yd2
254 g/m2
7.5 oz/yd2
254 g/m2
Tensile Strength
ASTM D-5034
350 x 250 lbs./in
333 x 230 daN/5 cm
350 x 250 lbs./in
333 x 230 daN/5 cm
Hydrostatic Resistance
D-751-95, Sec 34.2
385 psi
881 psi
Connectors
Curtain edge construction has 5/8” PP twisted rope reinforcements heat sealed into a pocket with # 4 brass grommets installed approx. 12” oc. to act as a lacing point.
Ballast Chain Weight
5/16” galvanized chain/ 95 lbs. / 100’
3/8” galvanized chain/ 115 lbs. / 100’
The chain ends of each section shall connect by galvanized shackles to aluminum stress plates at the bottom corner of the barrier
Top Load Cable
5/16” vinyl coated 7 x 19 galvanized steel cable w/ min. loading of 9800 lbs.
Seams
All seams to be heat sealed (expect on the Geotextile, which is sewn)


Note: Layfield can incorporate custom geotextile fabric types for project specifics; strengths and soil particle size containment. We have woven, heat bonded non-woven and needle punched non-wovens, and monofilament fabrics available