Grain Systems Bin Accessories PNEG-318 - Manual (Page 132)

17. Concrete Foundation Commercial Hopper Tanks
132 PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins
24' Diameter Commercial Hopper Tank Foundation up to 12 Rings
Figure 17I
NOTES: 1.
T
he found
ation de
sign is base
d
on a mi
nimum all
o
wab
le soil be
aring
cap
a
city of 30
00 PSF
. Be
aring
cap
a
ci
ty o
f
the
soil
s shou
ld b
e
de
te
rmi
ned
b
y
ge
otechni
cal investig
ati
on an
d
b
e
of
u
n
iform
b
earin
g ca
p
a
city
.
2.
T
he found
ation site must be
free of ve
get
ation
a
nd deb
ris
a
nd
we
ll drai
ned.
3.
T
he found
ation must
b
e
fou
nde
d bel
o
w
the
frost l
ine
or
constructed
on
n
on-exp
a
nsive frost free fi
ll.
4.
All
materia
l used for
b
a
ckfi
ll insi
de th
e ri
ng wal
l sh
oul
d
b
e
clean
, wel
l
g
ra
ded
, crushed
ro
ck or a sand-g
ravel
mixtu
re. Backfill
sho
u
ld
b
e
p
laced
in
6
"
lif
ts
, 95
%
co
mp
action.
5. All
rei
n
forcement
mu
st
meet the
re
q
u
ireme
n
ts
of AST
M
A61
5
grade
6
0
de
fo
rm
ed
b
a
rs.
6.
La
p all circumferentia
l bars 35 bar
dia
m
e
te
rs an
d st
ag
ger all
la
p
s
i
n
p
lans 3'
-0". Estimates do no
t incl
ude en
d lap
s
.
7.
Co
ncrete mu
st have
a mini
mu
m
co
mpre
ssi
v
e
streng
th
o
f 300
0 PSI at
2
8
days,
6%
-8% air entrain
me
nt, 4" slump
.
8. Co
des: UBC
97
,
ACI 3
18-95
.
9.
Interior top slab
may be crown
ed 2" to
p
rovide
wa
te
r
dra
inag
e away
from fou
nda
ti
on.
C
ro
w
nin
g
th
e
sl
ab wil
l
re
duce the clea
ra
nce und
er
the
di
scharge
.