
page 9 of 9
Schier | SI-75 Installation Guide
DO NOT COMPACT BACKFILL
7
Install Anti-Flotation Anchor Kit
8
Backfill and Finished Grade
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 compact backfill around unit.
8a
Backfill
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 SI-75
must be installed with Schier
model AK1 anchor kit.
Max water table height for direct burial
Model AK1 anchor kit
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.
TOP VIEW
18"
min
45º
18"
min
18"
min
18"
min
Concrete slab
Rebar
8b
Pour concrete slab to finished grade
Rebar