Grain Systems Bin Accessories PNEG-318 - Manual (Page 124)

124 PNEG-318 Concrete Foundation Recommendations for GSI Grain Bins
17. Concrete Foundation Commercial Hopper Tanks
12' Diameter Commercial Hopper Tank Foundation up to 12 Rings
Figure 17A
NOTES: 1
. Th
e fo
unda
ti
on desi
gn is based
o
n
a
min
imum
a
llo
wabl
e
so
il bea
ring
cap
a
city
of 300
0 PSF
. Bea
ri
ng
ca
p
a
city of the
soils
sh
oul
d be
determin
ed
by geo
te
chnica
l
in
vestiga
tio
n and
be
o
f un
ifo
rm be
aring
cap
a
city
.
2
. Th
e fo
unda
ti
on site mu
st be free of
ve
get
ation an
d debri
s
an
d
wel
l drain
ed.
3
. Th
e fo
unda
ti
on must be
fou
nded
b
e
low
the frost li
ne or constructe
d on
no
n-exp
a
n
s
ive fro
s
t fre
e
fil
l.
4
. All material
u
s
e
d
fo
r ba
ckfil
l insid
e
the
rin
g
wall
sho
u
ld
b
e
cl
ean, well
gra
ded, cru
s
hed rock or a
sa
nd-gra
v
e
l mi
xtu
re
. Backfill sho
u
ld be
pl
aced
in
6
" l
if
ts,
95
% co
mp
a
c
ti
on.
5
. All rein
fo
rce
m
e
n
t
must me
et
the
req
u
iremen
ts
of
AST
M A61
5
g
rade 60
d
e
fo
rm
ed
ba
rs.
6
.
Lap
a
ll
circumfe
rential
b
a
rs 3
5
bar
diame
ters and
st
agg
er
a
ll lap
s
in
pl
ans 3'
-0
".
Estimates
d
o
not inclu
de end
l
a
p
s
.
7
. Con
c
re
te
must have a minimum co
mpressive
strength of 300
0
PSI at
28
d
a
ys,
6%-8
% a
ir e
n
trainmen
t,
4"
slump.
8
. Cod
e
s: UBC 97
, ACI
31
8-95.
9
. Inte
rior to
p sl
ab may be crowne
d
2
" to
pro
v
ide water drai
nage
a
w
ay
from
fou
ndatio
n. Crow
ning
the
sla
b
will
red
u
ce th
e cl
earan
ce unde
r
the disch
arge.