3. To prevent accelerated corrosion in pipe legs,
installers should NOT seal the foot; they should,
however, cap the top ends or create a weep hole in the
concrete under the foot.
When pouring a new slab
Remesh (Fig. 2 ) - Grade 40 Steel wire mesh min.
0.1" diameter x max 6.0" squares. See Design C1 or
C2 details for any other components intended to be
imbedded in the remesh and slab before pouring. Note
cast in anchor in mesh.
Concrete (Fig. 3) - Single slab sized per Table 2
for tank dimensions & capacity using Sakrete (or
equivalent) standard 4000 psi compression strength mix
with remesh cut to slab size and centered in form.
Tank Securement Designs
CR = Corrosion Resistant, such as stainless steel or
plated steel rated for outdoor use.
62 National Oilheat Research Alliance
Designs A1 and
A2 (Fig. 4) – Details
of foot flange with
bolt or screw options
using similar flange,
hole drilling and
hole preparation.
There is a difference
with the anchoring
method (bolt or
screw).
Design A1 (Fig.
5) – Foot Flange
& Concrete Bolt Photo detail of small diameter flange
and one bolt combo for new or existing slabs before and
after assembly:
Foot Flange – Mueller Model 511-606HN (Home Depot
SKU# 182141) or equivalent 1.25" Floor Flange – 2.75"
diameter galvanized iron with pipe threads screwed
onto tank pipe leg and secured with one concrete bolt/
foot.
Concrete Bolt – CR Steel
Concrete Bolt (permanent
expansion type) minimum
3/8" diameter x 3.5" long
rated for at least ½ the
buoyant force (Table 2)
and installed in drilled hole
min. 2.5" deep.
Design A2 (Fig. 6)– Foot
Flange and Concrete
Screw Photo detail of
large diameter flange and
2-screw combo for new or
existing slabs before and
after assembly:
Foot Flange – Mueller
Model 301-F114 (Home
Depot SKU# 564311)
or equivalent 1.25"
Floor Flange – 3.50"
diameter black iron
w pipe threads and
four holes screwed
onto tank pipe leg
and secured with two
concrete screws/foot
into opposite holes
Concrete Screw
– CR Steel Concrete
Screw (removable or
permanent expansion
type) min. 1/4" diameter x 2.5" long rated for at least ¼
the buoyant force (Table 2) and installed in drilled hole
min. 2.0" deep.
Cleaning the hole and adding concrete
adhesive is strongly recommended!
Design B1 or B2 –Detail of eye or U
anchor options for casting in new concrete
slabs and connection to hold-down and
connection options. Four required-each
positioned +/- 4" off leg/support centrally.
Eye-Anchor (Fig. 7) –
CR Steel Eye-Bolt min.
3/8" diameter x 6.0"
long w mating large
diameter washer & nut
fixed under Remesh
and cast into concrete min. 4.0" deep
rated for at least ½ the buoyant
force.
U-Anchor (Fig. 8) – CR Steel U-Bolt
min. 1/4" diameter x 5.0" long w mating plate and nuts
fixed under Remesh and cast into concrete min. 3.5"
Fig. 3. Concrete slab
Fig. 4. Adding adhesive to the drilled
hole
Fig. 5. Design A1 foot flange with bolt
Fig 6. Concrete screws installed
after hole has been cleaned and
adhesive added
Fig. 7. Eye-Anchor
Fig. 8 U-Anchor
4