Rainstore
3
Storm Drainage Detention & Exfiltration with Geotextile Fabric
4
elevation more than 6mm (0.25 inches). All irregularities must be corrected and
re-leveled.
C.
Excavation must extend at least three feet beyond all sides of the Rainstore
3
placement area to allow ample room for product installation and sidefill
compaction.
D.
All inlet pipes and filtering systems should be installed to the edge of the
excavated area per manufacturer’s recommendation. Please see section 5.10, for
installation of connection pipes from these devices.
E.
Typically, inlet pipes are located near or at the top of the Rainstore
3
chambers and
outlet pipes (if necessary) are located along the bottom of the system. An
overflow pipe should be located at the top of the system.
5.2 Geogrid – First Layer:
A.
Three separate layers of
geogrid are required for
the Rainstore
3
system.
Geogrid arrives in rolls
and can be shipped on a
flatbed truck. Rolls are
available in two sizes:
9.84 ft x 164 ft roll that
weighs 102 lbs, or 13.1 ft
x 264 ft that weighs 138
lbs.
This product is not
supplied by Invisible
Structures.
Two or more workers should carry the geogrid roll into the excavated
area.
B.
Spread the first layer of geogrid at the base of the excavated area. The geogrid
will quickly unroll across the excavation area. Seams of the geogrid should
overlap at least 12 inches. The first layer provides a stable and even surface for
Rainstore
3
cell installation.
C.
The geogrid layers may be temporarily anchored with rocks or adequate debris, to
prevent it from rolling up before other system components can be installed.
