737GEOCELL

737.1GENERAL—From a manufacturer listed in Bulletin 15 and conforming to the following requirements:

one of the depths listed in Table B, as indicated.

• Sheet material High-density polyethylene (HDPE)

• UV Stabilization 1.5 - 2% carbon black, ASTM D1603

• Environmental Stress Crack Resistance 1,500 hours minimum, ASTM D1693

• Sheet surface Sheet, perforated or non-perforated, smooth or textured

• Sheet density 58.7 pounds per cubic foot minimum, ASTM D505

• Nominal sheet thickness 47 mils minimum, ASTM D5199

• Cell wall seams Assemble each seam with 3/4-inch maximum melt pools using continuous or uniformly spaced ultrasonic spot welding. Space welded seams conforming to the requirements of Table A for the Type of geocell.

• Cell seam peel strength Conform to the requirements of Table B, when tested according to PTM 301.

TABLE A Cell Characteristics per Geocell Type Type Nominal Cell Dimensions in.* Nominal Cell Area in.2* Avg. No. Cells per yd.2* Weld Spacing in.** A 8.8 x 10.2 44.8 28.9 14.0 ± 0.12 B 11.3 x 12.6 71.3 18.2 17.5 ± 0.12 C 18.7 x 20.0 187.0 6.9 28.0 ± 0.12 * For informational purposes only. ** In unexpanded configuration.

TABLE B Required Cell Seam Peel Strength Depth in. Cell Seam Peel Strength lbs. 3.0 ± 0.1 240 4.0 ± 0.1 320 6.0 ± 0.1 480 8.0 ± 0.1 640

on the geocell or its container, with the manufacturer’s name and model number or trade name.