#8 EconoDrain® and EconoDrain PT-3™ Hydraulic Data
We drain your site, not your budget!
MultiDrain Systems, Inc.
Copyright © July 2008 MultiDrain Systems, Inc.
System and Hydraulic Data: # 8 EconoDrain® and #8 EconoDrain PT-3™ EconoDrain® Series EPS Trench Forming System By MultiDrain Systems, Inc. Thank you for using our family of EPS Trench Forming products in your current and future projects. Our trench systems are engineered to conform to material and project specific specifications. MultiDrain Systems is dedicated to continuous product improvement with an eye to fit, form and function and the ever important cost \ benefit analysis. The following system and hydraulic data provides an overview of the following information:
o System Grating Inflow – Table and Graphical Representation Material Specification Grating Load Capability Specification Grating Dimensions Grate Open Area
o Trench Flow Capacity – Table and Graphical Representation
Trench Flow Capacity at 0.5% and 1.0% slope Trench Section Depths at 0.5% and 1.0% slope Trench Section Storage Capacity at 0.5% and 1.0% trench slope Adjustment factors, Fk, used to consider site slope and its effect upon
trench capacity Adjustment factor, Fk, sample calculation
o Outlet Pipe Discharge Flow Graphical Representation
PVC Outlet Pipe Discharge This information generally answers 99% of the project inquiries satisfactorily. If you need more information, we will be happy to address your questions. Please do not hesitate to let us know how we may serve your needs better. Thank you again for using MultiDrain Systems family of products. Our contact information is:
MultiDrain Systems, Inc. P.O. Box 88
Barium Springs, NC 28010
Toll Free: (800) 433-1119 or (704) 508-1010 Fax: (704) 508-1011
e-mail: [email protected]
You may view all of our product information at www.multidrainsystems.com
#8 E
cono
Dra
in®
Stan
dard
Cas
t Duc
tile
Gra
ting
Gra
te P
art N
o.:
EG
1024
1DIA
[Fin
ish:
Bla
ck (S
td.)]
EG
1024
1DIA
G[F
inis
h: G
alva
nize
d]
Gra
te L
engt
h:2
ft. (2
4 in
.)G
rate
Ope
n A
rea:
71%
Gra
te O
pen
Are
a (s
q. in
. / l.
ft)85
.4
Inflo
w p
er G
rate
Fro
mIn
flow
per
Gra
te F
rom
Inflo
w p
er G
rate
Fro
mIn
flow
per
Gra
te F
rom
Hea
d (in
)B
oth
Side
s of T
renc
hB
oth
Side
s of T
renc
hO
ne (1
) Sid
e O
nly
One
(1) S
ide
Onl
yE
G10
241D
IA (g
pm)
EG
1024
1DIA
(cfs
)E
G10
241D
IA (
gpm
)E
G10
241D
IA (
cfs)
1/4"
170.
048
0.02
1/2"
470.
1124
0.05
1"13
40.
3067
0.15
2"37
90.
8419
00.
423"
741
1.65
370
0.83
4-1/
2"1,
388
3.09
694
1.55
6"1,
812
4.04
1,04
72.
337-
1/2"
2,03
44.
539-
1/2"
2,27
85.
0811
"2,
404
5.36
12"
2,56
35.
71
Not
e:A
. In
flow
is c
alcu
late
d ut
ilizi
ng w
eir
and
orifi
ce e
quat
ions
. Hea
d (f
t.) is
the
dept
h of
wat
er a
bove
the
grat
e su
rfac
e.B
. W
eir
Flow
is m
odifi
ed to
use
onl
y th
e le
ngth
per
imet
er. W
idth
per
imet
ers a
re n
ot c
onsi
dere
d si
nce
tren
ch g
rate
s are
nor
mal
ly
laid
end
to e
nd a
nd n
ot u
tiliz
ed a
s a st
and
alon
e gr
atin
g.C
. C
alcu
late
d In
flow
is b
ased
on
fluid
flow
from
bot
h di
rect
ions
(wei
r) a
nd is
stat
ed fo
r on
e gr
ate
leng
th.
D
. N
o al
low
ance
is m
ade
for
debr
is c
logg
ing
the
grat
e.
E.
Wei
r Fl
ow to
Tra
nsiti
onal
at 0
.36'
hea
d - F
low
from
Bot
h Si
des.
F.
Tra
nsiti
onal
to O
rific
e flo
w a
t 0.5
4' h
ead
- Flo
w fr
om B
oth
Side
s.G
. D
imin
ishe
d ca
lcul
ated
flow
acc
urac
ies a
t hea
ds le
ss th
an 0
.1'.
H.
Tre
nch
Cha
nnel
flow
s fro
m 0
.57
cfs (
255
gpm
) to
4.65
cfs
(2,0
89 g
pm) p
er se
ctio
n at
0.5
% sl
ope
[0.5
" ri
se/9
6" r
un] .
I. 0
.03
cfs (
13.0
gpm
) ind
ivid
ual g
ratin
g in
flow
max
imiz
es tr
ench
with
ope
n en
d, fl
owin
g fu
ll w
ith a
320
l. ft
. run
.J.
M
ultip
ly In
flow
, sta
ted
in c
fs o
r gp
m, t
imes
4 to
est
imat
e gr
ate
inflo
w p
er 8
' lon
g se
ctio
n.
EG
1024
1DIA
Inflo
w
#8 S
tand
ard
Eco
noD
rain
Duc
tile
Gra
ting
Inflo
w, (
gpm
) - F
rom
Bot
h Si
des o
f Gra
te
0
500
1,00
0
1,50
0
2,00
0
2,50
0
3,00
0
1/4"
1/2"
1"2"
3"4-
1/2"
6"7-
1/2"
9-1/
2"11
"12
"
Hea
d of
Wat
er A
bove
Gra
ting,
(inc
hes)
Fluid Inflow, (gallons per minute)
EG
1024
1DIA
(gpm
)
#8 S
tand
ard
Eco
noD
rain
Gra
te: E
G10
241D
IA S
erie
sM
ater
ial:
AST
M A
536
65-4
5-12
Duc
tile
Iron
Loa
d Sp
ecifi
catio
n: A
ASH
TO
M30
6-04
HS2
5
Gra
te D
imen
sion
s: 1
.5"
x 10
" x
24"
Gra
te O
pen
Are
a: 7
1%G
rate
Ope
n A
rea:
170
.8 sq
. in.
EG
1024
1DIA
Inflo
w
#8 E
cono
Dra
in®
AD
A C
ast D
uctil
e G
ratin
gG
rate
Par
t No.
:E
G10
161D
IAD
AC
[Fin
ish:
Bla
ck (S
td.)]
EG
1016
1DIA
DA
CG
[Fin
ish:
Gal
vani
zed]
Gra
te L
engt
h:1.
33 fe
et (1
6 in
.)G
rate
Ope
n A
rea:
33.1
%G
rate
Ope
n A
rea
(sq.
in. /
l.ft)
39.7
Inflo
w p
er G
rate
Fro
mIn
flow
per
Gra
te F
rom
Inflo
w p
er G
rate
Fro
mIn
flow
per
Gra
te F
rom
Hea
d (in
)B
oth
Side
s of T
renc
hB
oth
Side
s of T
renc
hO
ne (1
) Sid
e O
nly
One
(1) S
ide
Onl
yE
G10
161D
IAD
AC
(gpm
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G10
161D
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AC
(cfs
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G10
161D
IAD
AC
(gp
m)
EG
1016
1DIA
DA
C (
cfs)
1/4"
110.
026
0.01
1/2"
320.
0716
0.04
1"89
0.20
450.
102"
252
0.56
126
0.28
3"41
40.
9224
60.
554-
1/2"
511
1.14
6"58
61.
317-
1/2"
658
1.46
9-1/
2"73
61.
6411
"77
71.
7312
"82
81.
85
Not
e:A
. In
flow
is c
alcu
late
d ut
ilizi
ng w
eir
and
orifi
ce e
quat
ions
. Hea
d (f
t.) is
the
dept
h of
wat
er a
bove
the
grat
e su
rfac
e.B
. W
eir
Flow
is m
odifi
ed to
use
onl
y th
e le
ngth
per
imet
er. W
idth
per
imet
ers a
re n
ot c
onsi
dere
d si
nce
tren
ch g
rate
s are
nor
mal
ly
laid
end
to e
nd a
nd n
ot u
tiliz
ed a
s a st
and
alon
e gr
atin
g.C
. C
alcu
late
d In
flow
is b
ased
on
fluid
flow
from
bot
h di
rect
ions
(wei
r) a
nd is
stat
ed fo
r on
e gr
ate
leng
th.
D
. N
o al
low
ance
is m
ade
for
debr
is c
logg
ing
the
grat
e.
E.
Wei
r Fl
ow to
Tra
nsiti
onal
at 0
.16'
hea
d - F
low
from
Bot
h Si
des.
F.
Tra
nsiti
onal
to O
rific
e flo
w a
t 0.2
5' h
ead
- Flo
w fr
om B
oth
Side
s.G
. D
imin
ishe
d ca
lcul
ated
flow
acc
urac
ies a
t hea
ds le
ss th
an 0
.1'.
H.
Tre
nch
Cha
nnel
flow
s fro
m 0
.57
cfs (
255
gpm
) to
4.65
cfs
(2,0
89 g
pm) p
er se
ctio
n at
0.5
% sl
ope
[0.5
" ri
se/9
6" r
un] .
I. 0
.03
cfs (
13.0
gpm
) ind
ivid
ual g
ratin
g in
flow
max
imiz
es tr
ench
with
ope
n en
d, fl
owin
g fu
ll w
ith a
320
l. ft
. run
.J.
M
ultip
ly In
flow
, sta
ted
in c
fs o
r gp
m, t
imes
4 to
est
imat
e gr
ate
inflo
w p
er 8
' lon
g se
ctio
n.
EG
1016
1DIA
DA
Inf
low
#8 E
cono
Dra
in A
DA
Duc
tile
Gra
te In
flow
, (gp
m) -
Fro
m B
oth
Side
s of G
rate
0
100
200
300
400
500
600
700
800
900
1/4"
1/2"
1"2"
3"4-
1/2"
6"7-
1/2"
9-1/
2"11
"12
"
Hea
d of
Wat
er A
bove
Gra
ting
(fee
t)
Fluid Inflow, (gallons per minute)
EG
1016
1DIA
DA
C (g
pm)
Eco
noD
rain
Gra
te E
G10
161D
IAD
AC
Ser
ies
Mat
eria
l: A
STM
A53
6 65
-45-
12 D
uctil
e Ir
onL
oad
Spec
ifica
tion:
AA
SHT
O M
306-
04 H
S25
FAA
AC
150
/532
0-6D
, App
endi
x 3,
100
,000
lb. P
roof
Loa
dG
rate
Dim
ensi
on: 1
.5"
x 10
" x
16"
Gra
te O
pen
Are
a: 3
3.1%
Gra
te O
pen
Are
a: 5
2.8
sq. i
n.
EG
1016
1DIA
DA
Inf
low
#8 E
cono
Dra
in P
T-3™
Cas
t Duc
tile
Gra
ting
Gra
te P
art N
o.:
EG
1024
3DIA
[Fin
ish:
Unc
oate
d]E
G10
243D
IAP
[Fin
ish:
Bla
ck]
EG
1024
3DIA
G[F
inis
h: G
alva
nize
d]G
rate
Len
gth:
2 ft.
(24
in.)
Gra
te O
pen
Are
a:54
%G
rate
Ope
n A
rea
(sq.
in. /
l.ft)
64.7
Inflo
w p
er G
rate
Fro
mIn
flow
per
Gra
te F
rom
Inflo
w p
er G
rate
Fro
mIn
flow
per
Gra
te F
rom
Hea
d (in
)B
oth
Side
s of T
renc
hB
oth
Side
s of T
renc
hO
ne (1
) Sid
e O
nly
One
(1) S
ide
Onl
yE
G10
243D
IA (g
pm)
EG
1024
3DIA
(cfs
)E
G10
243D
IA (
gpm
)E
G10
243D
IA (
cfs)
1/4"
170.
048
0.02
1/2"
470.
1124
0.05
1"13
40.
3067
0.15
2"37
90.
8419
00.
423"
741
1.65
370
0.83
4-1/
2"1,
197
2.67
694
1.55
6"1,
373
3.06
1,04
72.
337-
1/2"
1,54
13.
439-
1/2"
1,72
63.
8511
"1,
863
4.15
12"
1,94
24.
33
Not
e:A
. In
flow
is c
alcu
late
d ut
ilizi
ng w
eir
and
orifi
ce e
quat
ions
. Hea
d (f
t.) is
the
dept
h of
wat
er a
bove
the
grat
e su
rfac
e.B
. W
eir
Flow
is m
odifi
ed to
use
onl
y th
e le
ngth
per
imet
er. W
idth
per
imet
ers a
re n
ot c
onsi
dere
d si
nce
tren
ch g
rate
s are
nor
mal
ly
laid
end
to e
nd a
nd n
ot u
tiliz
ed a
s a st
and
alon
e gr
atin
g.C
. C
alcu
late
d In
flow
is b
ased
on
fluid
flow
from
bot
h di
rect
ions
(wei
r) a
nd is
stat
ed fo
r on
e gr
ate
leng
th.
D
. N
o al
low
ance
is m
ade
for
debr
is c
logg
ing
the
grat
e.
E.
Wei
r Fl
ow to
Tra
nsiti
onal
at 0
.35'
hea
d - F
low
from
Bot
h Si
des.
F.
Tra
nsiti
onal
to O
rific
e flo
w a
t 0.5
' hea
d - F
low
from
Bot
h Si
des.
G.
Dim
inis
hed
calc
ulat
ed fl
ow a
ccur
acie
s at h
eads
less
than
0.1
'.H
. T
renc
h C
hann
el fl
ows f
rom
0.5
7 cf
s (25
5 gp
m) t
o 4.
65 c
fs (2
,089
gpm
) per
sect
ion
at 0
.5%
slop
e [0
.5"
rise
/96"
run
] .I.
0.0
3 cf
s (13
.0 g
pm) i
ndiv
idua
l gra
ting
inflo
w m
axim
izes
tren
ch w
ith o
pen
end,
flow
ing
full
with
a 3
20 l.
ft. r
un.
J.
Mul
tiply
Inflo
w, s
tate
d in
cfs
or
gpm
, tim
es 4
to e
stim
ate
grat
e in
flow
per
8' l
ong
sect
ion.
EG
1024
3DIA
Inflo
w
#8 E
cono
Dra
in P
T-3
Gra
te In
flow
, (gp
m) -
Fro
m B
oth
Side
s of G
rate
0
500
1,00
0
1,50
0
2,00
0
2,50
0
1/4"
1/2"
1"2"
3"4-
1/2"
6"7-
1/2"
9-1/
2"11
"12
"
Hea
d of
Wat
er A
bove
Gra
ting,
(inc
hes)
Fluid Inflow, (gallons per minute)
EG
1024
3DIA
(gpm
)
#8 E
cono
Dra
in P
T-3
Gra
te: E
G10
243D
IA S
erie
sM
ater
ial:
AST
M A
536
65-4
5-12
Duc
tile
Iron
Loa
d Sp
ecifi
catio
n: A
ASH
TO
M30
6-04
HS2
5 &
FAA
AC
150
/532
0-6D
, App
endi
x 3,
100
,000
lb. P
roof
Loa
d &
Mod
ified
Spe
cific
atio
n fo
r 20
0,00
0 lb
. Pro
of L
oad
Gra
te D
imen
sion
s: 1
.5"
x 10
" x
24"
Gra
te O
pen
Are
a: 5
4%G
rate
Ope
n A
rea:
129
.4 sq
. in.
EG
1024
3DIA
Inflo
w
Tre
nch
Flow
Cap
acity
Mul
tiDra
in S
yste
ms,
Inc.
#8 E
cono
Dra
in a
nd #
8 E
cono
Dra
in P
T-3
Tre
nch
Form
ing
Syst
em
Stan
dard
EPS
For
ms w
ith T
renc
h Sl
ope
@ 0
.5%
, Rad
ius B
otto
m T
renc
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odifi
ed E
PS F
orm
s with
Tre
nch
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e @
1.0
%, R
adiu
s Bot
tom
Tre
nch
Std.
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#8 T
renc
h Fl
ow#8
Tre
nch
Flow
Std.
Sec
tion
Dep
thSe
ctio
nG
PM S
lope
EPS
#8 T
renc
h Fl
ow#8
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nch
Flow
Sect
ion
Dep
thSe
ctio
nG
PM S
lope
Sect
ion
Std.
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pe =
0.5%
Std.
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pe =
0.5%
Slop
e =
0.5%
Stor
age
Adj
ustm
ent
Sect
ion
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1.0%
)(S
lope
=1.
0%)
Slop
e =
1.0%
Stor
age
Adj
ustm
ent
(cfs
)(g
pm)
(in)
(US
Gal
s)Fa
ctor
, Fk
(cfs
)(g
pm)
(in)
(US
Gal
s)Fa
ctor
, Fk
0806
0.57
255
6.0
to 6
.512
.93,
603
0806
A0.
9442
16.
0 to
7.0
14.6
4,21
008
070.
6629
86.
5 to
7.0
14.6
4,21
008
07A
1.22
545
7.0
to 8
.017
.95,
454
0808
0.76
341
7.0
to 7
.516
.34,
828
0808
A1.
5067
38.
0 to
9.0
21.2
6,72
608
090.
8638
67.
5 to
8.0
17.9
5,45
408
09A
1.79
802
9.0
to 1
0.0
24.6
8,01
908
100.
9643
08.
0 to
8.5
19.6
6,08
708
10A
2.08
933
10.0
to 1
1.0
27.9
9,32
608
111.
0647
68.
5 to
9.0
21.2
6,72
608
11A
2.37
1,06
411
.0 to
12.
031
.310
,644
Shal
low
0812
1.16
521
9.0
to 9
.522
.97,
370
0812
A2.
671,
197
12.0
to 1
3.0
34.5
11,9
7008
131.
2656
79.
5 to
10.
024
.68,
019
0813
A2.
961,
330
13.0
to 1
4.0
37.9
13,3
04E
PS08
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3761
310
.0 to
10.
526
.28,
671
0814
A3.
261,
464
14.0
to 1
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41.2
14,6
4208
151.
4765
910
.5 to
11.
027
.99,
326
0815
A3.
561,
599
15.0
to 1
6.0
44.5
15,9
85Fo
rms
0816
1.57
706
11.0
to 1
1.5
29.6
9,98
408
16A
3.86
1,73
316
.0 to
17.
047
.817
,332
0817
1.68
753
11.5
to 1
2.0
31.2
10,6
4408
17A
4.16
1,86
817
.0 to
18.
051
.218
,682
0818
1.78
799
12.0
to 1
2.5
32.9
11,3
0608
18A
4.46
2,00
318
.0 to
19.
054
.520
,034
0819
1.89
846
12.5
to 1
3.0
34.5
11,9
7008
19A
4.77
2,13
919
.0 to
20.
057
.821
,388
0820
1.99
894
13.0
to 1
3.5
36.2
12,6
3608
20A
5.07
2,27
420
.0 to
21.
061
.122
,744
0821
2.10
941
13.5
to 1
4.0
37.9
13,3
0408
21A
5.37
2,41
021
.0 to
22.
064
.524
,102
0822
2.20
988
14.0
to 1
4.5
39.5
13,9
7208
22A
5.67
2,54
622
.0 to
23.
067
.825
,461
0823
2.31
1,03
514
.5 to
15.
041
.214
,642
0823
A5.
982,
682
23.0
to 2
4.0
71.1
26,8
2108
242.
411,
083
15.0
to 1
5.5
42.9
15,3
1308
24A
6.28
2,81
824
.0 to
25.
074
.428
,183
0825
2.52
1,13
015
.5 to
16.
044
.515
,985
0825
A6.
582,
954
25.0
to 2
6.0
77.8
29,5
4508
262.
621,
178
16.0
to 1
6.5
46.2
16,6
5808
26A
6.89
3,09
126
.0 to
27.
081
.130
,908
0827
2.73
1,22
616
.5 to
17.
047
.817
,332
0827
A7.
193,
227
27.0
to 2
8.0
84.4
32,2
7208
282.
841,
273
17.0
to 1
7.5
49.5
18,0
0608
28A
7.49
3,36
428
.0 to
29.
087
.733
,637
0829
2.94
1,32
117
.5 to
18.
051
.218
,682
0829
A7.
803,
500
29.0
to 3
0.0
91.1
35,0
0208
303.
051,
369
18.0
to 1
8.5
52.8
19,3
5708
30A
8.10
3,63
730
.0 to
31.
094
.436
,367
0831
3.16
1,41
718
.5 to
19.
054
.520
,034
0831
A8.
413,
773
31.0
to 3
2.0
97.7
37,7
34D
eep
0832
3.26
1,46
419
.0 to
19.
556
.120
,711
0832
A8.
713,
910
32.0
to 3
3.0
101
39,1
0008
333.
371,
512
19.5
to 2
0.0
57.8
21,3
8808
33A
9.02
4,04
733
.0 to
34.
010
4.4
40,4
68E
PS08
343.
481,
560
20.0
to 2
0.5
59.5
22,0
6608
34A
9.32
4,18
434
.0 to
35.
010
7.7
41,8
3508
353.
581,
608
20.5
to 2
1.0
61.1
22,7
4408
35A
9.63
4,32
035
.0 to
36.
011
143
,203
Form
s08
363.
691,
656
21.0
to 2
1.5
62.8
23,4
2308
373.
801,
704
21.5
to 2
2.0
64.5
24,1
0208
383.
901,
752
22.0
to 2
2.5
66.1
24,7
8108
394.
011,
800
22.5
to 2
3.0
67.8
25,4
6108
404.
121,
848
23.0
to 2
3.5
69.5
26,1
4108
414.
231,
897
23.5
to 2
4.0
71.1
26,8
2108
424.
331,
945
24.0
to 2
4.5
72.8
27,5
0208
434.
441,
993
24.5
to 2
5.0
74.4
28,1
8308
444.
552,
041
25.0
to 2
5.5
76.1
28,8
6408
454.
652,
089
25.5
to 2
6.0
77.8
29,5
45
Tab
le E
D 8
Hyd
- 01
Tre
nch
Slop
e A
djus
tmen
t Fac
tor,
Fk
Mul
tiDra
in S
yste
ms,
Inc.
Slop
e A
djus
tmen
t Fac
tor,
Fk
Prop
er e
valu
atio
n of
tren
ch fl
ow c
apac
ity m
ust t
ake
finis
hed
grad
e si
te sl
ope
into
con
side
ratio
n. S
ite sl
ope
para
llel t
o tre
nch
slop
e m
ay h
ave
a po
sitiv
e or
neg
ativ
e ef
fect
on
trenc
h flo
w c
apac
ity. R
egar
dles
s, it
is im
porta
nt to
eva
luat
e its
eff
ect t
o as
sure
eith
er a
n ad
equa
te tr
ench
dep
th a
nd sl
ope
is b
eing
inst
alle
d or
just
to m
axim
ize
effic
ienc
y an
d co
st o
f the
inst
alle
d tre
nch
as it
rela
tes t
o th
e de
sire
d de
sign
flow
par
amet
ers.
Tren
ch fl
ow c
apac
ity sh
own
in th
e ac
com
pany
ing
tabl
e an
d gr
aphs
is d
eter
min
ed b
y ap
plyi
ng M
anni
ngs E
quat
ion
for t
he st
anda
rd
Econ
oDra
in® tr
ench
slop
e of
0.5
% a
nd su
rfac
e ro
ughn
ess c
oeff
icie
nt o
f 0.0
13. T
he tr
ench
sect
ion
outle
t end
are
a is
util
ized
in th
e eq
uatio
nan
d th
e ar
ea o
ccup
ied
by th
e gr
atin
g or
cov
er is
exc
lude
d.
App
licat
ion
of th
e Sl
ope
Adj
ustm
ent F
acto
r, F k
is a
pplie
d ac
cord
ing
to E
quat
ion
A:
Q =
(Fk)
x (S
s + S
t)1/2
(equ
atio
n A
)W
here
:Q
eq
uals
tren
ch fl
ow in
gal
lons
per
min
ute
(gpm
)F k
is th
e sl
ope
adju
stm
ent f
acto
r fro
m th
e sy
stem
Tre
nch
Flow
Cap
acity
tabl
eS s
is th
e si
te sl
ope,
feet
per
feet
(dim
ensi
onle
ss)
S tis
the
trenc
h sl
ope,
feet
per
feet
(dim
ensi
onle
ss)
Exam
ple
1
A st
anda
rd E
cono
Dra
in #
8 tr
ench
is to
be
inst
alle
d in
a c
oncr
ete
slab
with
an
addi
tiona
l 0.2
% sl
ope
para
llel a
nd in
the
diec
tion
of tr
ench
flow
. The
tren
ch le
ngth
is 4
0 fe
et a
nd w
ill tr
aver
se th
e fu
ll le
ngth
of t
he c
oncr
ete
slab
. The
des
ired
desi
gn fl
ow c
apac
ity a
t the
en
d of
the
trenc
h is
900
gpm
. Det
erm
ine
the
prop
er tr
ench
size
for t
he g
iven
con
ditio
ns.
Tren
ch se
ctiin
082
0 ha
s a tr
ench
flow
of 8
94 g
pm (1
.99
cfs)
per
Tab
le E
D 8
HY
D-0
1. F
ive
trenc
h se
ctio
ns w
ill b
e re
quire
d to
fulfi
ll th
e 40
' tre
nch
leng
thre
quire
men
t.
Test
the
capa
city
of T
renc
h se
ctio
n 08
20 b
y ap
plyi
ng th
e Sl
ope
Adj
ustm
ent F
acto
r, F k
:
F k fr
om th
e Tr
ench
Flo
w C
apac
ity T
able
ED
8 H
YD
-01
for s
ectio
n 08
20 is
: 12,
636
S t =
0.0
05N
OTE
: gal
lons
per
min
ute
(gpm
) is c
onve
rted
to c
ubic
feet
per
seco
nd (c
fs) b
y di
vidi
ng th
e gp
m re
sult
S s =
0.0
02
b
y 44
8.83
1.
Q =
12,
636
x (0
.005
+ 0
.002
)1/2
Q =
105
7 gp
mTh
e re
sults
yie
ld a
17.
4% fl
ow c
apac
ity in
crea
se d
ue to
add
ition
al si
te sl
op.
Tre
nch
Slop
e A
djus
tmen
t Fac
tor,
Fk
Mul
tiDra
in S
yste
ms,
Inc.
Now
, tes
t a se
ctio
n ha
ving
a fl
ow c
apac
ity o
f app
roxi
mat
ely
747
gpm
or a
bout
83%
of t
he ta
rget
ed fl
ow o
f 900
gpm
.
Sect
ion
0817
tren
ch fl
ow c
apac
ity is
giv
en o
n Ta
ble
ED 8
Hyd
-01
as 7
53 g
pm. D
eter
min
e th
e va
lue
for F
k fro
m th
e sa
me
tabl
e.
Test
Tre
nch
Sect
ion
0817
, hav
ing
a F k
equ
al to
10,
644,
util
izin
g Eq
uatio
n A
.
Q =
10,
644
x (0
.005
+ 0
.002
)1/2
Q =
890
gpm
.
Tren
ch S
ectio
n 08
17 fa
lls sh
ort o
f the
targ
eted
flow
crit
eria
of 9
00 g
pm. T
ry to
get
clo
ser t
o th
e ta
rget
flow
by
test
ing
sect
ion
0818
.
Test
Tre
nch
Sect
ion,
081
8, h
avin
g a
F k e
qual
to 1
1,30
6.
Q =
11,
306
x (0
.005
+ 0
.002
)1/2
Q =
945
gpm
.
This
test
indi
cate
s Tre
nch
Sect
ion
0818
can
be
utili
zed
to a
ttain
a m
inim
um fl
ow c
apac
ity o
f at l
east
900
gpm
.
Ther
efor
e Tr
ench
Sec
tions
081
4 to
081
8 w
ill b
e us
ed to
form
the
40 li
neal
foot
tren
ch d
rain
.Th
e ov
eral
l tre
nch
dept
h w
ill b
e fr
om 1
0 in
. to
12.5
in.
Tren
ch d
isch
arge
flow
will
be
945
gpm
. The
tren
ch fl
ow c
an b
e ex
pres
sed
in c
ubic
feet
per
seco
nd (c
fs) b
y m
ultip
lyin
gth
e flo
w e
xpre
ssed
in g
pm b
y th
e m
ultip
lier 0
.002
228.
The
refo
re 9
45 g
pm is
equ
ival
ent t
o 2.
1 cf
s.
Q.E
.D.
Tre
nch
Flow
Cap
acity
- E
cono
Dra
in #
8 T
renc
h D
rain
Sys
tem
, Slo
pe =
0.5
%
0
500
1,00
0
1,50
0
2,00
0
2,50
0
0806080708080809081008110812081308140815081608170818081908200821082208230824082508260827082808290830083108320833083408350836083708380839084008410842084308440845
Tre
nch
Sect
ion
Part
Num
ber
Trench Flow Capacity (gpm)
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
Trench Flow Capacity (cfs)
(gpm
)(c
fs)
Tre
nch
Flow
Cap
acity
- E
cono
Dra
in #
8 T
renc
h D
rain
Sys
tem
, Slo
pe =
1.0
%
0
500
1,00
0
1,50
0
2,00
0
2,50
0
3,00
0
3,50
0
4,00
0
4,50
0
5,00
0
0806A
0807A
0808A
0809A
0810A
0811A
0812A
0813A
0814A
0815A
0816A
0817A
0818A
0819A
0820A
0821A
0822A
0823A
0824A
0825A
0826A
0827A
0828A
0829A
0830A
0831A
0832A
0833A
0834A
0835A
Tre
nch
Sect
ion
Part
Num
ber
Trench Flow Capacity (gpm)
0.00
2.00
4.00
6.00
8.00
10.0
0
12.0
0
Trench Flow Capacity (cfs)
(gpm
)(c
fs)
Q
, PV
C P
ipe
Flow
Dis
char
ge,
(gpm
)
-
5,00
0
10,0
00
15,0
00
20,0
00
25,0
00
46
810
1214
1618
20
Nom
inal
Pip
e Si
ze, (
in.)
Q, Pipe Discharge, (gpm)
Dis
char
ge (g
pm),
S=0.
5%D
isch
arge
(gpm
), S=
1.0%
Dis
char
ge (g
pm),
S=3.
0%D
isch
arge
(gpm
), S=
4.0%
Dis
char
ge (g
pm),
S=5.
0%
PVC
Pip
e Si
zes S
how
n fo
r C
ompa
rativ
e E
stim
ates
Onl
yN
OT
E: L
ocal
Eng
inee
ring
Eva
luat
ion
shou
ld b
e pe
rfor
med
bas
ed o
n ac
tual
pip
e la
yout
geo
met
ry.
Q, P
ipe
Flow
Dis
char
ge b
ased
on
Man
ning
s Equ
atio
n. A
ssum
es P
ipe
is fl
owin
g fu
ll.
N =
0.0
09, S
= P
ipe
Slop
eH
ead
Los
ses a
re n
ot in
clud
ed in
Dis
char
ge v
alue
.
Project: ____________________________________________________ Date:____________ Contact:_____________________________________________________________________
MultiDrain® Systems, Inc.
We Drain Your Site, Not Your Budget! P.O. Box 88, Barium Springs, NC 28010 drawn by: _____________________________ P: (704) 508-1010 or toll free: (800) 433-1119 F: (704) 508-1011 or e-mail at: www.multidrainsystems.com
MultiDrain Systems, Inc.
P.O. Box 88 Barium Springs, NC 28166
Phone: 704-508-1010 or Toll Free (800) 433-1119 Fax: 704-508-1011 E-mail: [email protected] www.multidrainsystems.com
We drain your site, not your budget!
Makers of:
EconoDrain® EPS Trench Forming System EconoDrain PT-3™ EPS Trench Forming Systems for Airports\Ports\DOT\Intermodal MultiDrain® Steel Trench Drain Systems Alfa Channel® Polymer Concrete Trench Drain
The reported properties and data contained in this publication are based on accepted practices, measurement and evaluation . They are intended as guidelines for the sole use by MultiDrain Systems, Inc. customers and are not meant to circumvent regional or local conditions or engineer’s evaluation. Information and data may be changed or amended at any time and without notice to the user. The information and data made available in this bulletin are provided “as is” without warranties or guarantees of any kind. Furthermore, any person who accesses such information, data, or material disclaims all liability for damages, costs and expenses, and agrees that there are no remedies for negligence, or under strict liability, or for breach of warranty or contract, including, but not limited to, indirect, consequential, punitive or incidental damages, even if notice was given of the possibility of such damages.