Rainstore
3
Storm Drainage Detention & Exfiltration with Geotextile Fabric
5
5.3 Geotextile Fabric:
Geogrid layer #3
Geotextile (encases Rainstore3)
Geogrid layer #2
Rainstore3 units
Geotextile (encases Rainstore3)
Geogrid layer #1
A. A layer of geotextile fabric is installed on top of the first layer of geogrid. The
geotextile encompasses all of the Rainstore
3
cells. The fabric is permeable,
allowing for slow exfiltration of water but preventing sediments from entering the
cells from the surrounding area.
Detention systems may require an outlet pipe,
please refer to your site plans.
B. The geotextile arrives in two rolls that measure 12.5 ft x 360 feet or 15 ft x 300
feet. Both roll sizes weigh 240 lbs. Two or more workers can lift and quickly
install the geotextile by unrolling it over the geogrid material. Seams should
overlap 12 inches. Seams can be joined with duct tape or a similar material to
prevent shifting of the geotextile fabric.
C. Be sure to leave excess fabric on all sides of the excavated area. The excess fabric
will later be brought up and around to encompass the sides and top of the
Rainstore
3
cells. The geotextile can be temporarily anchored at the sides of the
excavated area with rocks, bricks, or boards during installation.
5.4 Marking Rainstore
3
Placement:
A.
The Rainstore
3
installation area can be outlined on the geotextile using spray
paint, chalk line, or even rope. If using rope, make sure to remove all rope after
the Rainstore
3
cells are in place.
5.5 Position the Cells:
A.
Depending upon the height of the Rainstore
3
cells, two to four workers can carry the cells and
place them on the geotextile fabric.
B.
Workers can also use a dolly to roll the stacked
Rainstore
3
cells into place. Take care not to allow
the stacked unit to tip over to prevent stacked
cells from damage.
Damaged units CANNOT
