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June 2008
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Style
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ASTM
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Layfield Type 3.DOT
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Layfield Type 3.DOT (HD)
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Water Current Limitations
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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
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Floatation Buoyancy
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19 lbs/ft
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29 lbs/ft
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Floatation Size
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8” x 8” x 4’
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12” x 12” x 4’
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Fabric Curtain Body
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18 oz/yd2 Yellow Vinyl coated on a 6 oz/yd2 polyester scrim
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22 oz/yd2 Yellow Vinyl coated on a 6 oz/yd2 polyester scrim
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Grab Tensile
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D-5043
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397 x 373 lbs.
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500 x 400 lbs.
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Tongue Tear
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D-2261
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96 x 86 lbs.
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132 143 lbs.
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Adhesion
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D-751-95 Section 43.1.2
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15 lbs.
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25 lbs.
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Permeable Geotextile Body
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Polymer
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Polypropylene
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Polypropylene
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Weight
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ASTM D-2374
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7.5 oz/yd2
254 g/m2
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7.5 oz/yd2
254 g/m2
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Tensile Strength
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ASTM D-5034
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350 x 250 lbs./in
333 x 230 daN/5 cm
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350 x 250 lbs./in
333 x 230 daN/5 cm
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Hydrostatic Resistance
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D-751-95, Sec 34.2
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385 psi
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881 psi
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Connectors
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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.
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Ballast Chain Weight
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5/16” galvanized chain/ 95 lbs. / 100’
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3/8” galvanized chain/ 115 lbs. / 100’
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The chain ends of each section shall connect by galvanized shackles to aluminum stress plates at the bottom corner of the barrier
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Top Load Cable
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5/16” vinyl coated 7 x 19 galvanized steel cable w/ min. loading of 9800 lbs.
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Seams
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All seams to be heat sealed (expect on the Geotextile, which is sewn)
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