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7
Install Anti-Flotation Anchor Kit
If the installation location is in a
high water table or at risk area
(including but not limited to tidal
surge areas, floodplains and
areas that receive storm water)
the GB-1000 must be installed
with Schier model AK3 anchor kit
(with deadman anchors
by others).
8
Backfill and Finished Grade
Backfill
8a
Fill unit with water for stabilization and float-out prevention. Backfill evenly around tank using crushed aggregate
(approximately 3/4" size rock or sand with no fines)or flowable fill. Do not mechanically compact backfill around unit.
Pour concrete slab to finished grade
8b
Vehicular Traffic Areas:
Minimum 8" thick concrete slab with rebar required. Thickness of concrete around covers to be
determined by specifying engineer. If traffic loading is required the concrete slab dimensions
shown are for guideline purposes only. Concrete to be 28 day compressive strength to 4,000 PSI.
Use No. 4 rebar (ø 1/2") grade 60 steel per ASTM A615: connected with tie wire. Rebar to be 2-1/2"
from edge of concrete and spaced in a 12" grid with 4" spacing around access openings.
Pedestrian Traffic or Greenspace Areas:
Minimum 4" thick concrete slab with rebar required.
page 8 of 9
AK3 INSTALLATION
TOP VIEW
Rebar
Concrete Slab
Rebar
Deadmen
anchors
(by others)
DO NOT COMPACT BACKFILL
MECHANICALLY
Compact by hand only
18"
min
45º
18"
min
18"
min
18"
min
Schier | GB-1000-L Installation Guide
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