FAIRFAX COUNTY PUBLIC FACILITIES MANUAL...FAIRFAX COUNTY PUBLIC FACILITIES MANUAL NOTES: 1. Manhole to meet current requirements of ASTM Spec. C-478. 2. All reinforcing steel to meet

FAIRFAX COUNTY PUBLIC FACILITIES MANUAL


FAIRFAX COUNTY PUBLIC FACILITIES MANUALNOTES:1. Manhole to meet current requirements of

ASTM Spec. C-478.2. All reinforcing steel to meet current requirements of

ASTM Spec. A-615.3. Concrete to be Class A-4.4. Tapered joint with O-ring gasket, or single offset

joint with rubber gasket, to meet currentrequirements of ASTM Spec. C-443.

5. Pioneer 301 Mastic or approved equal must beused in addition to the joint specified.

6. Grout inverts must consist of a PortlandCement concrete mix to VDOT Spec, for Class B-2 orcontaining 1 part cement, 2 parts mortar sand and 31/2 parts aggregate. The surface must be handtroweled smooth with no coarse aggregate exposedand the benches are to have a light broom finish.

7. Flexible joint required on all pipe connectionsto manholes. Flexible Joint pipe to manholesleeve may be Kor-N-Seal, Interspace,Presswedge or approved equal.Installation must be in accordancewith manufacturer’s instructions.Where field conditions will not permitthe use of a sleeve, a maximum24” stub may be used. (SeeSection 10.0102.5G.)

8. Joint configuration may be cast bell-up orspigot-up.

9. Manufacturer’s name to be cast insteps or on inside face of cone andis to be clearly visible withoutentering the structure.

Galvanized steelstrapping device3” X 3/8” *$ <i*$ AJ

4 *•.- '111** 1Pioneer 301 Mastic 2or approved equal \on exterior side ofJoint (Typical allPrecast manholes). I

2 0-ring gasketor singleoffset gasket,ASTM C-443* <•

1Ni siisCast iron anchoror expansionshield (typ.)drill and groutin place.

CD g1 *.

4 •

J L . <

3 .\1” X 3” lag bolt (typ.)

For frame v

anchorage \detail seePlate 10-10 . , .

24” 8”

1 12” max.adj. rings

4*'

I ^8 ” I

< ’/4”max.•. A

Imax./ r

/ / Steps tobe set —in line

Cone height (variable)

l/ l/l/

/ l/ Manhole StepCast in place(See Plate 13-10)

I// I/ r/

//

/See detail of this plate forinstallation of strapping —device as shown wheremanhole is subject towater velocities. Individualmanholes to be strappedand details as to numberSc location of straps to beshown on plans.

1*0” min. to5 4 max.Risers1 N!JJjs

x— i,ii}- Lifting hole

' (Optional)a ls I + Notch for 0-ringor single offsetgasket (see detailabove)

I lv |CM I i3I Optional - Max. 3”

tapered lift hole,plugged withrubber plug.Mortar or masticoutside only.

III 12” or 16”

typ.lIIl BaseiiiBase section to provide min. 6”

clearance between top of pipeand bottom of bell and spigot joint.

Slope bench 1” to 2” perft. midpoint of pipe.

IIll

4” IIIn fill areas, base section N

footing must be spread a min.8” or more as detailed onthe plans.

min ii V v :

•4'

JA

t9)

l ” Min.*1 -.. 4 , i-- J81 •1 * 5”— =Hf|fSg|§g§2 4’-0”

5’-6” Min.I

Ref. Sec. 10-0102.5D(7),Plate 4— 10 PLATE NO. STD. NO.

TYPICAL 4*-0” IDPRECAST CONCRETE MANHOLE 3-10 DPW-15Rev. I — 00, 20ll Reprint,

4-13, 2018 Reprint

FAIRFAX COUNTY PUBLIC FACILITIES MANUALManhole frame Sc cover(See plates 8— 10, 9-1010-10, Sc 11-10)

For detail of manhole Frameanchorage see plate 6-10

ii

MH DIMENSIONS II ESMH DIA. IN FT.Adjustment rings12” max. adj.5*0” 6’0”

L:.fUco 60” 72”A 8” Max.24”o w*84^B ": "h•-r * *

CO 6 ”C .4v8 ” ow D 4^/Std. precast cone.

^ 4* — 0” Cone -

(See Plate 3-10)

a min.min. : yQ . r:4 IU •/- r/ INOTES: »_•A.*-.-0-Ring or

single offsetgasket,ASTM C— 443-

I1. Concrete to be Class A-4.2. Pipe connections to conform to

Note 7, Plate 3-10.3. All reinforcing steel to meet current

requirements of ASTMSpec. A-615.

4. Manufacturer’s name to be castin steps or on inside face of coneand is to be clearly visible withoutentering the structure.

5. Manhole to meet currentrequirements of ASTMSpec. C-478.

6. Compacted gravel under basesections must conform toPlate 3-10. I

7. Joint configuration may be cast /,bell-up or spigot-up.8. Pioneer 301 Mastic or

equal must be used into the joint specified.(See Plate 3-10)

fV

Steps to be y \ 'set in line — ,'44

.1,. 1:*

Std. precast cone, riser4* — 0” dia.—

(See plate 3-10)

•fa. i*! i

I 12” or 16”M '•4(typ.)|

Manhole step jl ..

il*

:'-l (See Plate 13-10)f I. AStd. precast cone.—

flat top reducer(See Plate 13A-10)

• • 4’ i' .* .- A JL,iA.' f< • i- . y

4•4 ,4 .approved-addition

* 4

•4

‘1& ,11 • < •

k Optional — max.3* tapered lift holeplugged with rubberplug. Mortar ormastic outside fonly. /

*1ir: r . ri •

•r - • j • i>Standard precastconcrete base riser(See chart thissheet for dimensions)

12” min. J4/Is . J; I-.U i *

v \

$i p4 J'.-.•J

A - t•. i •I* 4.>1" I .4

K: lvStandard precastconcrete base riser

(See chart thissheet for dimensions)

• lBase section to providemin. 6” clearance between topof pipe opening and bottomof bell and spigot joint.

:4A.4

ur .1 .vl\

I -6”I- i

•. "•*».

4 ' • 4 4 4• .• •• . , ••* 4 : •. *; -“ T

*• •• •./ *4 4: -44.* •

_sT:D v*- • 4;.T -T.-.. » • •• 1jill •*: •i -. Pi/ ’

.:k. ** 4 4 4r *. 4*•

c AB

Ref. Sec. 10-0102.5D(7) STD. NO.PLATE NO.TYPICAL 5’ — 0” & 6’ — 0”

DIAMETER PRECAST CONCRETEMANHOLE WITH 4’-0” STACK 4-10 DPW-16

Rev. 1-00, 2011 Reprint,4-13, 2018 Reprint


NOTES:CHART ” A”1. Concrete to be Class A-4.

2. All reinforcing steel to meet thecurrent requirements of ASTMSpec. A-615.

3. Manhole sections to meet thecurrent requirements of ASTMSpec. C — 478.

4. Tapered joint with 0-Ring Gasket, or singleoffset joint with rubber gasket, to meet currentrequirements of ASTM Spec. C-443.

5. Doghouse opening may only beused when placing a new MHover an existing line; otherwise,the opening must be cast. Size,location & angle of entry mustbe as required by the plans.

6. MH section to be cast inthe base a min. of 2” .

7. Joint configuration may be castbell-up or spigot-up.

N. DIMENSIONS (in. )MI4’ — 0” 6’ — 0”5’ — 0”MH4d 60”A 72”

B 58” 72” 86 ”6 ”5” 7”C

6” 8” 10 ”DDimensions of D must be taken frombottom of key (see drawing below)

8. Holes in precast units are to be4” min. 8” max. larger thanthe outside dia. of the proposedpipe.

9. Base section to provide min. 6”clearance between top of pipeopening and bottom of bell andspigot joint.

Notch for 0-Ring or singleoffset gasket, ASTM C-4437

Pioneer 301 Masticor approved equal. Optional — tapered max. 3” lift

hole plugged with rubberplug. Mortar or masticoutside only.

». .£ ‘4

AStd. precast concretedoghouse

Seal with non-shrinkgrout (Embecco or /equal).

05 < <.

Q393<D O

•c*> ®^ <13

. .<

!d

‘ <

For size ofopening seeNote 8.

A4”'A**

min.!

< 'aCM|

APB

Ref. Sec. 10-0102.5D(7)PLATE NO. STD. NO.

PRECAST CONCRETE MANHOLEDOGHOUSE BASE 5-10 DPW-17Rev. 1-00, 4-13, 2018

Reprint


SECTION A-AFor Frame Anchorage DetailSee Plate 10-10 See Note 6

* -4 '"4* 4- -'*• " *> 4*. • 4

7=-iT-D •—7 «.4.4 >. *>l V-' :f li4” - 5” I

Tt A^C- 1 IJ— UI iB

i ii

NOTES:Concrete to be Class A-4.1. MANHOLE SIZE (in.)

O’-O”4*-0” s’-o”2 . All reinforcing steel to meetcurrent requirements of ASTMSpec. A-615.Manhole sections to meetcurrent requirements of ASTMSpec. C-478.

60” 72”48”A58” 72^ 86”B

7”5” 6”C3. 6” 8”8”D

4. Flat tops must be used onlywhen specifically required onthe plans, or where there is aheight or invert conflict, asdetermined by the contractor orthe precast manufacturer, andapproved by the inspector.Joint configuration may be castbell-up or spigot-up.A max. adjustment of 12” on amanhole flat top is allowed.

5.

6.

A A\

7z

TOP VIEW

Ref. Sec. 10-0102.5D(7),Plate 4-10 STD. NO.PLATE NO.

PRECAST CONCRETEMANHOLE FLAT TOP 6-10 DPW-18

Rev. 1-00, 2011 Reprint,2018 Reprint




25 1/2” dia.

1”y/'//////A2 1/8”0

SECTION A-A

Ref. Sec. 10-0102.5D(7),Plate 4-10 PLATE NO. STD. NO.STANDARD ROADWAY

MANHOLE COVER DPW-21A9-10Rev. 1-00





• . 4 4 •. < 1”

<A

A<

<a.44 •< • • A . UQ)>OMH Wall

a; oJL I-Ho «

d H•rH COs a

a•»

05

I•t •»

lO CO

T12” overall

Approved MH step manufacturers:M. A. Industries, Inc. -’’Plastic Step” orDelta, Oliver Tire and Rubber Company Wedge-Lok Safety Step, or approved equal.

Steps must be steel with plastic or rubbercoating unless otherwise specified forcaustic service.

Ref. Sec. 10-0102.5D(7)Plate 3-10, 4-10 PLATE NO. STD. NO.MANHOLE STEP

DETAIL 13-10 DPW-24Rev. 1-00, 2011 Reprint,2018 Reprint


Top View

T TA A

Notes:1. Concrete to be Class A-4

Dimensions2. All reinforcing steel to meetcurrent requirements of ASTMSpec. A-615

5’ — 4’ 6’ — 4’60” 72”A72” 85”B

3. Manhole sections to meetcurrent requirements of ASTMSpec. C-478

6 ”c8” 8 ”D

4. Joint configuration may becast Bell-up or Spigot-up

4’ — 10”

-4’ — 0” -

I4” — 5”

•4.'

A• « . .’4 «D iV

4: - V' 54-. -4 V-«41 «

4” — 5” .44 \

i'

I A-C-B

Section A-A

Kef . Sec. 10-0102.5D(7),Plate 4-10 PLATE NO. STD. NO.PRECAST CONCRETE

MANHOLE REDUCER 13A-10 DPW-19Rev. 1-00, 2011 Reprint,2018 Reprint


T Jk Inside drop connection to beused under specialcircumstances such as:

Bad soils / rockHigh water tableUtility conflictsExcessive depths

<

A

4

<A

< 4A

A,< ..

4"• A <

A

4< A-

2”A AAA

IA .

8” San.A' A '

77- 3 -

\AA

6 ”AA

A '4+4 ' *

27”a&

StrapA

A . <»'<

aA

AAA

^A— - 7»

6 ” Special notesSee Section 10-0102.5E et seq.

AA

min.dia. A

1 ’ A

A4

StrapA r 4 <

Slope bench 1” to 2”per foot to midpointof pipe

AA

1 * .A A

A<A

/S'•.< .

w// w 4-4II<'4 - 4 . AGrouU* .

f< '

A - 4 >/ 4 -— *.A • A 4 *’ A . A4 • 4A A AAA A 4 • 4

Ref. Sec. 10-0102.5ESTD. NO.PLATE NO.

TYPICAL 4’ MANHOLE WITHINSIDE DROP CONNECTION 14-10 DPW-25B

Rev. 1-00, 2-07, 2018Reprint


Nl— ITT— TTT— TTTl 1 lTTTl 1 >TT

Backfill and compaction requirements inaccordance with Section 10— 0104.2L(13).Select backfill — hand packed to 95%compaction in accordance with VDOT specsSections 523.03,

^302 and 303.10, max

granular size 1”

12”

Be1/2 Be

1/4 Be Crushed stone VDOT size 57, 68, or 78 inaccordance with VDOT specs Section 203.Table II — 5

7-

Ref. Sec.6-1607.1B(2),10-0103.7, Plate17-10

TYPICAL TRENCH CONSTRUCTIONPIPE BEDDING

(CONTRACTOR’S OPTION )

PLATE NO. STD. NO.

ALTERNATE ” A”15-10Rev. 1-00, 2011

Reprint, 2018 Reprint DPW-6

Backfill and compaction requirements inaccordance with Section 10-0104.2L(13)

4”Crushed stone VDOT size 57, 68, or 78 inaccordance with VDOT specs Section 203Table II — 5Be

1/2 Be

1/4 Be7-

NOTE 1: The width of the trench is to be as specified by the Engineer on theplans or as set forth in the Specs. Max. trench width and depth must be asspecified in Tables 10.4 and 10.5. Trenching methods must be in compliance withthe Va. Department of Labor and Industry (VOSH) requirements.NOTE 2: The pipe must be bedded in carefully compacted granular material placedon a flat trench bottom. The granular material must be crushed stone VDOT size57, 68, or 78, in accordance with VDOT Spec. Section 203. The granular beddingmust have a min. thickness of 1/4 the outside pipe dia. (4” min.) and mustextend vertically in accordance with alternatives A or B. If the max. width of thetrench at the top of the pipe exceeds those specified, granular bedding materialwill be brought to the top of the pipe for the full width of the trench. Theremainder of the side fills and a min. depth of 12” over the top of the pipemust be filled with carefully compacted material. Should the contractor elect touse larger stone to carry the water, the larger stone is to be placed beneath thespecified amount of granular material. The larger stone is not in any way toaffect the amount of granular material to be used.

Ref. Sec. 6-1607.1B(2),10-0103.7, Plates 17-10,18-10, 19-10

PLATE NO. STD. NO.TYPICAL TRENCH CONSTRUCTIONPIPE BEDDING - ALTERNATE ” B”

( CONTRACTOR’S OPTION ) DPW-616-10Rev. 1-00, 2011 Reprint,2018 Reprint



a<D> cd"PH

Acd ao

\j/ V\/ \s\/ V\/ \s \l/ V” T” , ” Y” or SaddleConnection

FLOW

;; */*:.T*7»|f V 'ifl : .. *»*•*'*•.

>1 *"PHaConcrete cradle

to joint** ; ' \. -'Jr?-*'

JH90° unless otherwiseshown on plans

co

7/

ffflj=n]=18” min. NOTE:

For elevations andfurther details, seePlate 19-10.Lateral material as specified in

Section 10-0103.8 or in theInternational Plumbing Code

Bedding beyond concrete cradlemust conform to Note 2 of Plate16-10.

Property line

\ Location Sc elevation of end oflateral must be marked as shownon Plate 19— 10.

D*

(See Plate 19-10.)

Watertight plug

5” dia. laterals must connect to 8” dia. sewer mains by way of a manufactured ” T”or ” Y” . 6” dia. laterals must connect to collector sewers in sizes from 8” to 15” byway of a manufactured ” Y” only with prior approval from the Department of PublicWorks and Environmental Services. Lateral connections to sewers greater than 15” indiameter must be made at manholes. Approved saddles may be used for 5” dia.connections for 8” dia. rigid pipe sewer mains.

Not applicable to Planned Development DistrictsHand mixing allowed per VDOT specifications

Ref. Sec. 10-0104.5A,Plate 19-10 STD. NO.PLATE NO.

HOUSE LATERAL (SPUR)DPW-1018-10

Rev. 1-00, 6-01, 2011Reprint, 2018 Reprint


NOTES:Gravel bedding beyond the concrete cradle mustconform to Note 2 of Plate 16-10.

TO AVOID CONFLICTS WITH OTHERUNDERGROUND SERVICE UTILITIES,THE MINIMUM LATERAL EXTENSIONDISTANCE (D)* MUST BE:

1.

2. Lateral pipe material must be as specified inSection 10— 0103.8 or in the International20 ft beyond the property

line or within 5 ft of theminimum yard requirement,whichever distance is less.

Single— FamilyDetached

Plumbing Code.3. Cl Saddles must be as made by Richmond

Foundry, Pioneer Foundry, or approved equal.5 ft beyond the propertyline or sanitary sewereasement, whicheverdistance is greater.

Single— Family• Townhouse: :::

4. A long sweep, 90-degree bend may be used as analternate to two 45-degree bends.

PropertyLine

MarkerPole

71dS7 co

=i r l i ,-i M“ i i I^^-I i I-^I i 7

7Optional riser with watertight plugallowed within the minimumlateral extension distance

7df—=?<r i

•HaIDbCMinimum and maximum

grade must be 1.04% and4.17% respectively for alllaterals.

T3 7 dd iV IA I

I p<I 71 -po V ~ “ 7$ Jr < A7I b£

A +*i— Concrete cradleto joint**

w/ 0)\ -P/\X eti

45° bend n\ \ \ 7 Invert

elevationas shown

OIL on plans

\I l»rp» My**or saddle i l

4'-* '

'-V vA'- •* . v . ••• *•*••• .*••• s-5D°• 4- 4 .<;. - ' ’•

/ ’

4 «. -: ¥•

Gravelbedding perPlate 16-10,Note 2.

Spring line J 4 *

-n ^11

Invert of houseconnection mustbe at crown ofsewer.

* . -11•S* .T...V‘'.l- vV

4' 4

D*rv*

Compacted gravel

FOR PLAN VIEW, SEE PLATE 18-10.

Not applicable to Planned Development DistrictsHand mixing allowed per VD0T specifications

Ref. Sec. 10-0104.5A,Plate 18-10 PLATE NO. STD. NO.

HOUSE LATERALCONSTRUCTION DETAIL 19-10 DPW-11Rev. 1-00, 6-01, 2011

Reprint, 2018 Reprint


HOLE IN PIPE ABOVE SPRING LINE

Cut away view Hole in pipe

I/\

Spring line

3” hole - max. allowable(Note 1)Cut away view

1I

6 ” 3” 6 ”(Note 1) (Note 1)15” 226 Smith— Blair

repair clamp(or equal)

Clamp width

Note 1:Damage exceeding 3” must be repaired as stated underreplacement of pipe - see Section 10-0104.7C et seq.6” -min. dimension from extremity of damaged area toend of sleeve.

Ref . Sec. 10-0104.7E( 1)PLATE NO. STD. NO.HOLE IN PIPE

ABOVE SPRINGLINE 20-10 RG-1Rev. 1— 00, 2018 Reprint


15 <c>180°Hole in pipe

(Pipe replacementrequired)

Springline

Existing pipe Existing pipe

I£

Replacement pipe

Repair clamp j— Repair clamp

7

Ref. Sec. 10-0104.7E(2)PLATE NO. STD. NO.HOLE IN PIPE BELOW

SPRING LINE 21-10 RG-2Rev. 1 — 00, 2018 Reprint

(£ Shear crack226 Repair clamp I

P6” 1 6”

(R) ' (R)12”

Ref. Sec. 10-0104.7E(3) PLATE NO. STD. NO.PIPE WITH CRACK OR SHEAR

22-10 RG-2Rev. 1 — 00, 2018 Reprint


CRUSHED SECTION OR SECTIONS OF PIPE

AREA OF CUTHairlinefracture Crushed

area /— Cut line1 (See note 1)Cut line

35

12” 12”Extremity of Min. distance fromextremity of damagedarea, which must includehairline fractures.(Applies to each end ofdamaged area)

damaged areamin. min.Min, length of section to

be cut and replaced

Note 1 Cuts will be made on a vertical plane withan approved cutting tool. After the cut hasbeen made, a visual inspection will be madeto check for hairline fractures on the insideof pipe; additional pipe will be cut out ifthis condition is found.

Existingpipe

Existingpipe

3\ l

Replacement pipe

3 IRepairclamp

Repairclamp

SLIPPED OR LEAKING JOINTS

Ref. Sec. 10-0104.7E(4),10-0104.7E(5) CRUSHED SECTION OF PIPE

AND SLIPPED OR LEAKINGJOINT

STD. NO.PLATE NO.

23-10 RG-3Rev. 1-00, 2018 Reprint


A'« -IA '

4il ' — i I I I i i- I. i i .A . A

Sewer test plug <

<A t

3” x 1/2” reducerr JrtU

A< <A A< AA<A lA . A< • A H< <A . A' AA <A A<A< . <A -A ' < A - A.<AA <A< A - A << A . < A" . A 4, :» 4. ' « -ffl=l I I =1-I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I

Ref. Sec. 10-0105.5BPLATE NO. STD. NO.

SEWER TEST PLUG24-10

Rev. 1-00, 2018 Reprint



oCASINGPIPE SIZE (ID )

z IQH PU.CARRIER

PIPE(In )

MINIMUMREQUIRED

CASINGcn Q

SIZE o< o(hi ) z£ 5 w IHy .&C 3y .&

C\2OH

I £ VARIESC/312” MIN./24” MAX. —H — 12” MIN./24” MAX.

10’10’H MAX. wMAX.APPROVED CASINGSPACER POLYMERRUNNERS

PH HPo PH

Z Q*--£< +&H H

CARRIERPIPEO

SEE NOTE 4.HJ CASINGPIPE

SEE NOTE 2.PQ inSEE NOTE 3. h-)& < w° zSEE NOTE 1.PH PIPE IN CASINGEND VIEW z>H STEEL CASING PIPE DETAIL hPH NO SCALE

£ HHo COo NOTES:

X Casing pipe must be smooth wall carbon steel pipe, joints must be squared and continuously welded.Wall thickness: 42” ID and greater —36” ID and less - 0.375”Carrier pipe must be ductile iron.Casing spacers must be carbon steel with polyvinyl chloride coating as manufactured by PSI orstainless steel as manufactured by Cascade Waterworks Inc. or approved equal. Runner width must bea minimum of 2” .End closures: Casing end seals must be pull-on type molded from synthetic rubber or approvedequal. Seals must be attached to casing pipe by band clamps. Band clamps must be type 304stainless steel. Seals must have molded seats for proper location of bands.

1.< .5”PH aPH •l-Hu2. PH0)<3 3. PH

CO

oCM

4.o

I05

><DPH

» »CD to

WCD»-b

1 *

C0a ^ a>r+* |«• OO10.00

Sgso II

o- oi

©u>©m BOLLARDS (6) TYPICAL -

6” MIN. DIAM.- SCH. 40STEEL PIPE CONCRETE FILLED

•d 056” REINFORCED CONCRETESLAB

05 S3a

>1.5’ MIN. — |(TYP) XH nI

<2. J4.9’ 4.9’ Ocl©- -©©n in H

^ r'n 10.0’ TJit-1 cl£H TYPICAL RECYCLINGDUMPSTER

TYPICAL TRASHDUMPSTER tfl

t-1

Q > i n5.3’ X 6.2’5.3’ X 6.2’cnTJ Mb >

9»I> n1.0’ MIN. 1.0’ MIN.© r-1

H19.0’ CLEAR OPENINGi TRUCK ACCESS (TYP.)a 1.5’ , MIN.1.5’ MIN.I C/3

I £T)

£ro >CD H22.0 ’wI c!a >o o t-1

aHa

I 2ocn

Documents

FAIRFAX COUNTY PUBLIC FACILITIES MANUAL...FAIRFAX COUNTY PUBLIC FACILITIES MANUAL NOTES: 1. Manhole to meet current requirements of ASTM Spec. C-478. 2. All reinforcing steel to meet