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#8 EconoDrain
and EconoDrain
PT-3
Hydraulic Data
We drain your site, not your budget!
MultiDrain Systems, Inc.
Copyright July 2008 MultiDrain Systems, Inc.
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System and Hydraulic Data: # 8 EconoDrain and #8
EconoDrain PT-3EconoDrain Series EPS Trench Forming SystemBy MultiDrain Systems, Inc.
Thank you for using our family of EPS Trench Forming products in your current and futureprojects. Our trench systems are engineered to conform to material and project specific
specifications. MultiDrain Systems is dedicated to continuous product improvement with aneye 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 calculationo Outlet Pipe Discharge Flow Graphical Representation
PVC Outlet Pipe DischargeThis information generally answers 99% of the project inquiries satisfactorily. If you needmore 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 againfor using MultiDrain Systems family of products.
Our contact information is:
MultiDrain Systems, Inc.
P.O. Box 88Barium Springs, NC 28010
Toll Free: (800) 433-1119 or (704) 508-1010
Fax: (704) 508-1011e-mail: [email protected]
You may view all of our product information at www.multidrainsystems.com
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#8EconoDrain
StandardCastDuctileGratin
g
GrateP
artNo.:
EG10241DIA
[Finish:Black(Std.)
]
EG10241DIAG
[Finish:Galvanized]
GrateLength:
2ft.
(24in.)
GrateOp
enArea:
71%
GrateOpenArea(sq.
in.
/l.ft)
85.4
Inflowper
GrateFrom
InflowperGrate
From
InflowperGrateFrom
InflowperGrateFrom
Head(in)
BothSidesofTrench
BothSidesofTr
ench
One(1)SideOnly
One(1)SideOnly
EG10241DIA(gpm)
EG10241DIA(cfs)
EG10241DIA(gpm)
EG10241DIA(cfs)
1/4"
17
0.04
8
0.02
1/2"
47
0.11
24
0.05
1"
1
34
0.30
67
0.15
2"
3
79
0.84
190
0.42
3"
7
41
1.65
370
0.83
4-1/2"
1,388
3.09
694
1.55
6"
1,812
4.04
1,047
2.33
7-1/2"
2,034
4.53
9-1/2"
2,278
5.08
11"
2,404
5.36
12"
2,563
5.71
Note:
A.Inflowiscalculatedutilizingweirandorificeequations.Head(ft.)isthedepthofw
aterabovethegratesurface.
B.WeirFlow
ismodifiedtouseonlythelengthp
erimeter.Widthperimetersarenotconsideredsincetrenchgratesarenormally
laidendtoendandnotutilizedasastandalonegrating.
C.CalculatedInflowisbasedonfluidflowfrom
bothdirections(weir)andisstatedf
oronegratelength.
D.Noallowa
nceismadefordebriscloggingthegrate.
E.WeirFlow
toTransitionalat0.36'head-Flow
fromBothSides.
F.Transition
altoOrificeflowat0.54'head-FlowfromBothSides.
G.Diminishedcalculatedflowaccuraciesatheadslessthan0.1'.
H.TrenchCh
annelflowsfrom0.57cfs(255gpm)to4.65cfs(2,089gpm)persectiona
t0.5%s
lope[0.5"rise/96"run].
I.0.03cfs(13.0gpm)individualgratinginflowm
aximizestrenchwithopenend,flow
ingfullwitha320l.ft.run.
J.MultiplyInflow,statedincfsorgpm,times4t
oestimategrateinflowper8'longsection.
EG10241DIAInflow
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#8StandardEconoDrainDu
ctileGratingInflow,(gpm)-From
BothSidesofGrate
0500
1,0
00
1,5
00
2,0
00
2,5
00
3,0
00
1/4"
1/2"
1"
2"
3"
4-1/2"
6"
7-1/2"
9-1/2"
11"
12"
HeadofWaterAboveGrating,(inches)
FluidInflow,(gallonsperminute)
EG10241DIA(gpm)
#8S
tandardEconoDrainGrate:EG
10241DIASeries
Material:ASTMA53665-45-12D
uctileIron
LoadSpecification:AASHTOM3
06-04HS25
GrateDimensions:1.5"x10"x24"
GrateOpenArea:71%
GrateOpenArea:170.8sq.in.
EG10241DIAInflow
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#8
EconoDrainADACastDuctileGrating
GratePartNo.:
EG10161DIADAC
[Finish:Black(Std.)]
EG10161DIADACG
[Finish:Galvanized]
GrateLeng
th:
1.33feet(16in.)
GrateOpenArea:
33.1%
GrateOpenArea(sq.in./l.ft)
39.7
InflowperGrate
From
InflowperGrateFrom
InflowperGrateFrom
InflowperGrateFrom
Head(in)
BothSidesofTrench
BothSidesofTrench
One(1)SideOnly
One(1)SideOnly
EG10161DIADAC
(gpm)
EG10161DIADAC(cfs)
EG10161DIADAC(gpm)
E
G10161DIADAC(cfs)
1/4"
11
0.02
6
0.01
1/2"
32
0.07
16
0.04
1"
89
0.20
45
0.10
2"
252
0.56
126
0.28
3"
414
0.92
246
0.55
4-1/2"
511
1.14
6"
586
1.31
7-1/2"
658
1.46
9-1/2"
736
1.64
11"
777
1.73
12"
828
1.85
Note:
A.Inflowiscalculatedutilizingweirandorificeequations.Head(ft.)isthedepthofwaterabovethegratesurface.
B.WeirFlowismodifiedtouseonlythelengthperimeter.Widthperimetersarenotconsid
eredsincetrenchgratesarenormally
laidendtoendand
notutilizedasastandalonegrating.
C.CalculatedInflo
wisbasedonfluidflowfrombothd
irections(weir)andisstatedforonegratelength.
D.Noallowanceis
madefordebriscloggingthegrate.
E.WeirFlowtoTransitionalat0.16'head-Flowfrom
BothSides.
F.TransitionaltoOrificeflowat0.25'head-Flowfrom
BothSides.
G.Diminishedcalculatedflowaccuraciesatheadslessthan0.1'.
H.TrenchChannelflowsfrom0.57cfs(255gpm)to4.6
5cfs(2,089gpm)persectionat0.5%
slope[0.5"rise/96"run].
I.0.03cfs(13.0gpm)individualgratinginflowmaximizestrenchwithopenend,flowingfullwitha320l.ft.run.
J.MultiplyInflow,statedincfsorgpm,times4toestim
ategrateinflowper8'longsection.
EG10161DIADAInflow
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#8EconoDrainADAD
uctileGrateInflow,(gpm)-FromB
othSidesofGrate
0100
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"
HeadofWaterAboveGrating(feet)
FluidInflow,(gallonsperminute)
EG10161DIADAC(gpm)
EconoDrainGrateEG10161DIADA
CSeries
M
aterial:ASTMA53665-45-12DuctileIron
LoadSpecification:AASHTOM306-0
4HS25
FAAAC
150/5320-6D,Appendix3,100,000lb.ProofLoad
GrateDimension:1.5"x10"x1
6"
GrateOpenArea:33.1%
GrateOpenArea:52.8sq.in.
EG10161DIADAInflow
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#8EconoDrainP
T-3
CastDuctileGrating
GrateP
artNo.:
EG10243DIA
[Finish:Uncoated]
EG10243DIAP
[Finish:Black]
EG10243DIAG
[Finish:Galvanized]
GrateLength:
2ft.(24in.)
GrateOp
enArea:
54%
GrateOpenArea(sq.in./l.ft)
64.7
Inflowper
GrateFrom
InflowperGrate
From
InflowperGrateFrom
InflowperGrateFrom
Head(in)
BothSidesofTrench
BothSidesofTr
ench
One(1)SideOnly
One(1)SideOnly
EG10243DIA(gpm)
EG10243DIA(cfs)
EG10243DIA(gpm)
EG10243DIA(cfs)
1/4"
17
0.0
4
8
0.0
2
1/2"
47
0.1
1
24
0.0
5
1"
1
34
0.3
0
67
0.1
5
2"
3
79
0.8
4
190
0.4
2
3"
7
41
1.6
5
370
0.8
3
4-1/2"
1,197
2.6
7
694
1.5
5
6"
1,373
3.0
6
1,0
47
2.3
3
7-1/2"
1,541
3.4
3
9-1/2"
1,726
3.8
5
11"
1,863
4.1
5
12"
1,942
4.3
3
Note:
A.
Inflowiscalculatedutilizingweirandorificeequations.Head(ft.)isthedepthofw
aterabovethegratesurface.
B.
WeirFlow
ismodifiedtouseonlythelengthp
erimeter.
Widthperimetersarenotconsideredsincetrenchgratesarenormally
laidendtoendandnotutilizedasastandalonegrating.
C.
CalculatedInflowisbasedonfluidflowfrom
bothdirections(weir)andisstatedf
oronegratelength.
D.
Noallowa
nceismadefordebriscloggingthegrate.
E.
WeirFlow
toTransitionalat0.3
5'head-Flow
fromBothSides.
F.
Transition
altoOrificeflowat0.5
'head-Flow
fromBothSides.
G.
Diminishedcalculatedflowaccuraciesatheadslessthan0.1
'.
H.
TrenchCh
annelflowsfrom0.5
7cfs(255gpm)to4.6
5cfs(2,0
89gpm)persectiona
t0.5
%s
lope[0.5
"rise/96"run].
I.0.0
3cfs(13.0gpm)individualgratinginflowm
aximizestrenchwithopenend,
flow
ingfullwitha320l.ft.run.
J.
MultiplyInflow,statedincfsorgpm,
times4t
oestimategrateinflowper8'longsection.
EG10243DIAInflow
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#8EconoDrainPT-3GrateInflow,(gpm)-FromBothSide
sofGrate
0500
1,000
1,500
2,000
2,500
1/4"
1/2"
1"
2"
3"
4-1/2"
6"
7-1/2"
9-1/2"
11"
12"
H
eadofWaterAboveGrating,(inches)
FluidInflow,(gallonsperminute)
EG10243DIA(gpm)
#8E
conoDrainPT-3Grate:EG10243DIASeries
Material:ASTMA53665-45-12DuctileIron
LoadSpecification:AASHTOM306-04
HS25&
FAAAC150/5320-6D,Appendix3,100,000lb
.ProofLoad&
ModifiedSpecificationfor200,0
00lb.ProofLoad
GrateDimensions:1.5"x10"x2
4"
GrateOpenArea:54%
GrateOpenArea:129.4sq.in.
EG10243DIAInflow
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Trenc
hSlopeAdjustmentFactor,Fk
MultiDrainSystems,Inc.
SlopeAdjustmentFactor,F
k
Properevaluationoftrenchflowcapacitymusttakefinishedgradesiteslopeintoconsideration.Siteslop
eparalleltotrench
slopemayhaveapositiveor
negativeeffectontrenchflowcapacity.Regardless,itisimportanttoevaluateitseffecttoassureeitheran
adequatetrenchdepthandslopeisbeinginstalledorjusttomaximizeefficiencyandcostoftheinstalledtrenchasitrelatestothe
desireddesignflowparamete
rs.
Trenchflowcapacityshown
intheaccompanyingtableandgraphs
isdeterminedbyapplyingManningsE
quationforthestandard
EconoDraintrenchslopeof
0.5%andsurfaceroughnesscoefficientof0.013.Thetrenchsectionoutletendareaisutilizedintheequation
andtheareaoccupiedbythe
gratingorcoverisexcluded.
ApplicationoftheSlopeAdjustmentFactor,Fkisappliedaccording
toEquationA:
Q=(Fk)x(Ss+St)
1/2
(equationA)
Where:
Q
equalstrenchflowingallonsperminute(gpm)
Fk
istheslopeadjustmentfactor
fromthesystemTrenchFlowCapacitytable
Ss
isthesiteslope,feetperfeet(dimensionless)
St
isthetrenchslope,feetperfeet(dimensionless)
Example1
AstandardEconoDrain#8trenchistobeinstalledinaconcreteslabwithanadditional0.2%slopeparallelandinthediection
oftrenchflow.Thetrenchlengthis40feetandwilltraversethefulllengthoftheconcreteslab.Thedesireddesignflowcapacityatthe
endofthetrenchis900gpm.Determinethepropertrenchsizeforthegivenconditions.
Trenchsectiin0820hasatrenchflowof894gpm(1.99cfs)perTableED8HYD-01.Fivetrenchsectionswillberequiredtofulfillthe40'trenchlength
requirement.
TestthecapacityofTrenchs
ection0820byapplyingtheSlopeAdjustmentFactor,Fk:
FkfromtheTrenchFlowCap
acityTableED8HYD-01forsection
0820is:12,636
St=0.005
NOTE:gallonsp
erminute(gpm)isconvertedtocubic
feetpersecond(cfs)bydividingtheg
pmresult
Ss=0.002
by448.8
31.
Q=12,636x(0.005+0.002)1/2
Q=1057gpm
Theresultsyield
a17.4%flowcapacityincreasedueto
additionalsiteslop.
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Trenc
hSlopeAdjustmentFactor,Fk
MultiDrainSystems,Inc.
Now,testasectionhavingaflowcapacityofapproximately747gp
morabout83%ofthetargetedflowo
f900gpm.
Section0817trenchflowcap
acityisgivenonTableED8Hyd-01as753gpm.DeterminethevalueforFkfromthesametable.
TestTrenchSection0817,ha
vingaFkequalto10,644,utilizingEq
uationA.
Q=10,644x(0.005+0.002)1/2
Q=890gpm.
TrenchSection0817fallsshortofthetargetedflowcriteriaof900gpm.Trytogetclosertothetargetflowbytestingsection0818.
TestTrenchSection,0818,havingaFkequalto11,306.
Q=11,306x(0.005+0.002)1/2
Q=945gpm.
ThistestindicatesTrenchSection0818canbeutilizedtoattainam
inimumflowcapacityofatleast900gpm.
ThereforeTrenchSections0814to0818willbeusedtoformthe40linealfoottrenchdrain.
Theoveralltrenchdepthwillbefrom10in.to12.5in.
Trenchdischargeflowwillbe945gpm.Thetrenchflowcanbeexpressedincubicfeetpersecond(cfs)b
ymultiplying
theflowexpressedingpmby
themultiplier0.002228.Therefore945gpmisequivalentto2.1cfs.
Q.E.D.
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TrenchFlowCapacity-
EconoDrain#8TrenchDrainSystem
,Slope=0.5
%
0500
1,0
00
1,5
00
2,0
00
2,5
00
0806
0807
0808
0809
081008
11
0812
0813
0814
0815
0816
0817
0818
0819
0820
0821
0822
0823
0824
0825
0826
0827
0828
0829
0830
08310
832
0833
0834
0835
0836
0837
0838
0839
0840
0841
0842
0843
0844
0845
TrenchSectionPartNumber
TrenchFlowCapacity(gpm)
0.0
0
0.5
0
1.0
0
1.5
0
2.0
0
2.5
0
3.0
0
3.5
0
4.0
0
4.5
0
5.0
0
TrenchFlowCapacity(cfs)
(gpm)
(cfs)
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TrenchFlowCapacity-
EconoDrain#8TrenchDrainSystem,Slope=1.0%
0500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
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
TrenchSectionPartNumber
TrenchFlowCapacity(gpm)
0.00
2.00
4.00
6.00
8.00
10.00
12.00
TrenchFlowCapacity(cfs)
(gpm)
(cfs)
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Q,PVCPipeFlowDischarge,(gpm)
-5,000
10,000
15,000
20,000
25,000
4
6
8
10
12
1
4
16
18
20
NominalPipeSize,(in.)
Q,PipeDischarge,(gpm)
Discharge(gpm),S=0.5%
Discharge(gpm),S=1.0%
Discharge(gpm),S=3.0%
Discharge(gpm),S=4.0%
Discharge(gpm),S=5.0%
PVCPipeSizesShownforComparativeEstimates
Only
NOTE:LocalEngineeringEvaluationshouldbeperformedbasedonactualpipelayoutgeometry.
Q,PipeFlo
wDischargebasedonManningsEquation.AssumesPipeisflowingfull.
N=0.009,S=PipeSlope
HeadLossesarenotincludedinDischargevalue.
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Project: ____________________________________________________Date:____________
Contact:_____________________________________________________________________
MultiDrainSystems, 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) 508-1011or e-mail at:www.multidrainsystems.com
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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 intendedas guidelines for the sole use by MultiDrain Systems, Inc. customers and are not meant to circumvent regional or local conditions or engineersevaluation. 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, anyperson 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.
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