PRESSURE MAINGRAVITY ORPRESSUREMAIN - MRWA
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A B D C G F N O Q H MRWA SEWERAGE STANDARDS VERSION ISSUED MELBOURNE RETAIL WATER AGENCIES DATE: DATE: CHECKED: DRAWN: DESIGNED: 1 2 6 7 8 9 10 12 11 3 4 5 H H GWW SEW YVW DATE NAME APPROVED: GWW SEW YVW DATE NAME APPROVED DATE DESCRIPTION REV A 1 2 6 3 4 5 B C D A E F G 1 2 6 7 8 9 10 12 11 3 5 A B C D E F G H Planning Design Construction R. JAGGER R. JAGGER D. MOORE C. PAXMAN K. DAWSON R. CARRUTHERS J. TOMASI 1 JULY 2015 1 JULY 2015 PRE-PUBLISHED DRAFT 1 2 PUBLISHED FIRST ISSUE 01/10/15 CP / JT / KD / RJ 2015 1 CP / JT / KD / RJ D. O'DONOVAN 01/09/15 01/09/15 01/09/15 01/09/15 01/09/15 01/09/15 01/03/15 ALL DIMENSIONS IN mm UNLESS STATED OTHERWISE NOT TO SCALE MAINTENANCE HOLE INTERNAL DROP CONSTRUCTION, MADE TO ORDER (CONCRETE OR GRP) MRWA-S-311 1 150 123 TABLE 311-A: COMPONENTS C E SEWER SIZE 100 225 300 147 253 253 418 BOTTOM BEND OFFSET Ø/2 55 85 85 TABLE 311-B: DROP PARAMETERS FOR PVC DWV FITTINGS Minimum drop represents the minimum difference between the IL of the incoming sewer and outgoing sewer that can be achieved using conventional DWV fittings. DESCRIPTION BASE FOUNDATION PIPE CONNECTOR BASE DROP BEND ITEM DROP PIPE DROP PIPE INLET INLET CONNECTOR SHAFT PENETRATION CONCRETE / FRP MATERIAL A B D F G H I NATIVE SOIL OR CONCRETE MIN DROP DN 225 150 100 150 K M STANDING PLANK COATING OR LINING H REFER FIGURES 310-D TO 310-G I J REFER MRWA-S-309 REFER MRWA-S-314 FOR & SUPPLIED BY MAINTENANCE L REFER FIGURE 506-C2 FOR ACCEPTABLE METHODS ADAPTOR (IF REQ'D) PENETRATION SEAL INCOMING SEWER PIPE SHAFT LADDER / STEP IRONS BOTTOM BEND OFFSET STEP IRON COMP AS PER TABLE 500-B PVC DWV / PP / GRP CONCRETE / FRP APPROVED STEP IRON N/A J K L M N O P S SUPPORT BRACKETS 316SS DEPENDS ON RISK LEVEL IF CONCRETE, REFER MRWA-S-310 60° BEND NOTES REFER MRWA-S-310 FOR DETAILS ENSURE ENTIRE VOID IS FILLED / OVERLAPPED REQUIRED TO SUPPORT STANDING PLANK INSTALL VERTICALLY. SIZE AS PER TABLE 307-D REFER FIGURES 311-C to E REFER FIGURE 314-I CONCRETE / FRP SS316 / GRP / P.E.S T CHASE (FOR DROP) STRAIGHT IF POSSIBLE AT 135° TO OUTLET SEWER Q REFER MRWA-S-401 AND TABLE 307-E TOP FITTING OFFSET FIGURE 311-E: DROP ARRANGEMENTS FOR PWWF INFLOWS > 2 m/s, or PRESSURE MAIN SHAFT CONNECTIONS FIGURE 311-A: INTERNAL DROP MAINTENANCE HOLE DWV FITTINGS WITH CONCRETE MH SHOWN FIGURE 311-B: INTERNAL DROP MAINTENANCE HOLE (PLAN VIEW) T COMPACTED BACKFILL GRANULAR MATERIAL REFER MRWA BACKFILL SPECIFICATION DN100 OR DN150 INLET HIGH LEVEL INLET > DN225 95 130 530 530 TOP FITTING OFFSET 90° BEND WITH REDUCER AND CUT OUT FACTORY FABRICATED MANUFAC- TURED CUT OUT ELBOW ("GUNPIPE") 1200 E S P ADDITIONAL NOTES Regarding Table 311-A items: · All < DN225 components shall be SCJ PVC DWV, not solvent cemented. · All DN300 components shall be RRJ PVC DWV. DN375 components shall be all RRJ GRP or all RRJ PVC DWV. · All > DN450 components shall be RRJ GRP. SEW requires Type 5 drops in this case (refer to SEW for details). · Other Made to Order MHs (ie: GRP) shall be constructed in compliance with this standard as much as practical. · Pre-fabricated MHs may have internal drop options. Install as per per MRWA-S-306B. Item D. Chase for drop pipe shall be straight, at the maximum grade nominated in Table 205-B. Item E. Ensure base correctly supports the bottom bend as shown in Figures 311-C, D & E. Do not enclose bend so that it cannot be easily replaced. Angle outlet of drop bend so that it is in line with the direction of the channel. Item H. Install support brackets equidistanced at maximum 1500 spacing. Install at least one bracket at the top and bottom of each drop > 600 tall. Install directly under sockets if possible (provided the bracket hole is 100 clear of shaft penetrations) so that the bracket can support the vertical weight of the pipework. Item I. If concrete shaft, wall penetration shall be 50 to 100 larger in diameter than the outside Ø of the connecting pipe. Rough penetration surface required to enable a strong mortar seal . Smooth cut penetration is not acceptable. Item J. Fit end of socket flush with inside wall of MH. Item L. GRP to PE pressure main connections shall be a Flanged Joints. Often oversized GRP flange required. Item P. Place a step iron directly across (+/- 10°) the MH from a ladder rung at ~1.2m height below center of high level sewer. Not required for drops < 1.8m tall. Item R. Where item P installed. Install a handgrip 1.2m directly above Item P, orientated vertically. Item P & R. If concrete MH, drill holes in set concrete and install step iron as per the manufacturer's instructions. REFER FIGURES 310-D TO 310-G 600 MIN PERMITTED DROP 500 1100 900 FIGURE 311-D: DROP ARRANGEMENT FOR DN100-150 SEWERS FIGURE 311-C: DROP ARRANGEMENT FOR > DN225 SEWERS SCREW CAP IF GRAVITY MAIN INFLOW. PLAIN TEE (NO CAP) IF PRESSURE MAIN INFLOW SWEEP TEE BEND LONG RADIUS BEND OR CURVE (DEPENDING ON GRADE). REF MRWA-S-104B NOTES Regarding Figure 311-E: · No reducer required in drop. · Utilise sweep tees if DWV pipework. · Install one bracket above the Tee for < DN225 pipework. Locate centrally. · Install two brackets above the Tee for > DN300 pipework. Locate 100 from each end. DROP PIPE SUPPORT BRACKET DROP PIPE SUPPORT BRACKET BASE CUT OUT TABLE LEVEL CHANNEL Ø = INFLOW SEWER Ø TABLE LEVEL CHANNEL Ø = INFLOW SEWER Ø HAND GRIP APPROVED STEP IRON R REQUIRED FOR WORKERS TO HOLD ON TO R 3 MINOR ANNOTATION CHANGES SEP 20 CP / GA / RL INFLOW SEWER Ø Ø Ø TABLE LEVEL BASE BASE PVC DWV / GRP PVC DWV / PP / GRP PVC DWV / GRP PVC DWV / GRP PVC DWV / GRP PVC DWV / PP / GRP <100 GRAVITY OR PRESSURE MAIN PRESSURE MAIN <100 <100 IF CONCRETE SHAFT REFER FIG 317-A IF DWV TO PE PRESSURE MAIN GRP pipework drop heights shall be determined in consultation with the supplier. The designer shall confirm that there is sufficient elevation change for a drop to be fitted. 2 x SEWER Ø 100 100 IF PRESSURE PIPE, ADAPT TO DWV or GRP AS PER TABLE 317-F
Transcript of PRESSURE MAINGRAVITY ORPRESSUREMAIN - MRWA
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MRWA SEWERAGE STANDARDS
VERSIONISSUED
MELBOURNE RETAIL WATER AGENCIESDATE:
DATE:
CHECKED:DRAWN:DESIGNED:
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DATENAME APPROVED:
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YVW
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APPROVEDDATEDESCRIPTIONREV
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1 2 6 7 8 9 10 12113 5
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Planning Design Construction
R. JAGGERR. JAGGER
D. MOOREC. PAXMANK. DAWSON
R. CARRUTHERS
J. TOMASI
1 JULY 20151 JULY 2015
PRE-PUBLISHED DRAFT1
2 PUBLISHED FIRST ISSUE 01/10/15 CP / JT / KD / RJ
2015 1CP / JT / KD / RJ
D. O'DONOVAN01/09/1501/09/1501/09/15
01/09/1501/09/1501/09/1501/03/15
ALL DIMENSIONS IN mm UNLESS STATED OTHERWISE NOT TO SCALE
MAINTENANCE HOLEINTERNAL DROP CONSTRUCTION,
MADE TO ORDER (CONCRETE OR GRP)
MRWA-S-3111
150
123
TABLE 311-A: COMPONENTS
C
E
SEWERSIZE100
225300
147253253418
BOTTOM BENDOFFSET
Ø/2
558585
TABLE 311-B: DROP PARAMETERS FOR PVC DWV FITTINGS
Minimum drop represents the minimum difference between the IL of the incomingsewer and outgoing sewer that can be achieved using conventional DWV fittings.
DESCRIPTIONBASE FOUNDATION
PIPE CONNECTORBASE
DROP BEND
ITEM
DROP PIPEDROP PIPE INLET
INLET CONNECTORSHAFT PENETRATION
CONCRETE / FRP
MATERIALAB
D
FGHI
NATIVE SOIL OR CONCRETE
MINDROP DN
225150
100150
K
M
STANDING PLANK
COATING OR LINING
H
REFER FIGURES 310-D TO 310-G
I
J
REFER MRWA-S-309REFER MRWA-S-314
FOR & SUPPLIED BY MAINTENANCE
L
REFER FIGURE 506-C2 FOR ACCEPTABLE METHODS
ADAPTOR (IF REQ'D)PENETRATION SEAL
INCOMING SEWER PIPESHAFTLADDER / STEP IRONS
BOTTOMBENDOFFSET
STEP IRON
COMP AS PER TABLE 500-B
PVC DWV / PP / GRPCONCRETE / FRP
APPROVED STEP IRONN/A
JKLMNOP
S
SUPPORT BRACKETS 316SS
DEPENDS ON RISK LEVEL
IF CONCRETE, REFER MRWA-S-310
60° BEND
NOTESREFER MRWA-S-310 FOR DETAILS
ENSURE ENTIRE VOID IS FILLED / OVERLAPPED
REQUIRED TO SUPPORT STANDING PLANK
INSTALL VERTICALLY. SIZE AS PER TABLE 307-DREFER FIGURES 311-C to EREFER FIGURE 314-I
CONCRETE / FRP
SS316 / GRP / P.E.S
T
CHASE (FOR DROP) STRAIGHT IF POSSIBLE AT 135° TO OUTLET SEWER
Q
REFER MRWA-S-401 AND TABLE 307-E
TOPFITTINGOFFSET
FIGURE 311-E: DROP ARRANGEMENTS FOR PWWF INFLOWS > 2 m/s, orPRESSURE MAIN SHAFT CONNECTIONS
FIGURE 311-A: INTERNAL DROP MAINTENANCE HOLEDWV FITTINGS WITH CONCRETE MH SHOWN
FIGURE 311-B: INTERNAL DROP MAINTENANCE HOLE (PLAN VIEW)
T
COMPACTED BACKFILL GRANULAR MATERIAL REFER MRWA BACKFILL SPECIFICATION
DN100 ORDN150 INLET
HIGH LEVELINLET> DN225
95130
530530
TOP FITTINGOFFSET
90° BEND WITHREDUCER AND CUT OUTFACTORY FABRICATED
MANUFAC-TURED CUTOUT ELBOW("GUNPIPE")
1200
E
S
P
ADDITIONAL NOTES Regarding Table 311-A items:· All < DN225 components shall be SCJ PVC DWV, not solvent cemented.· All DN300 components shall be RRJ PVC DWV. DN375 components shall be all RRJ GRP or all RRJ PVC DWV.· All > DN450 components shall be RRJ GRP. SEW requires Type 5 drops in this case (refer to SEW for details).· Other Made to Order MHs (ie: GRP) shall be constructed in compliance with this standard as much as practical.· Pre-fabricated MHs may have internal drop options. Install as per per MRWA-S-306B.Item D. Chase for drop pipe shall be straight, at the maximum grade nominated in Table 205-B.Item E. Ensure base correctly supports the bottom bend as shown in Figures 311-C, D & E. Do not enclose bend so that
it cannot be easily replaced. Angle outlet of drop bend so that it is in line with the direction of the channel.Item H. Install support brackets equidistanced at maximum 1500 spacing. Install at least one bracket at the top and
bottom of each drop > 600 tall. Install directly under sockets if possible (provided the bracket hole is 100 clear ofshaft penetrations) so that the bracket can support the vertical weight of the pipework.
Item I. If concrete shaft, wall penetration shall be 50 to 100 larger in diameter than the outside Ø of the connecting pipe.Rough penetration surface required to enable a strong mortar seal . Smooth cut penetration is not acceptable.
Item J. Fit end of socket flush with inside wall of MH.Item L. GRP to PE pressure main connections shall be a Flanged Joints. Often oversized GRP flange required.Item P. Place a step iron directly across (+/- 10°) the MH from a ladder rung at ~1.2m height below center of high level
sewer. Not required for drops < 1.8m tall.Item R. Where item P installed. Install a handgrip 1.2m directly above Item P, orientated vertically.Item P & R. If concrete MH, drill holes in set concrete and install step iron as per the manufacturer's instructions.
REFER FIGURES 310-D TO 310-G
600
MIN PERMITTEDDROP500
1100900
FIGURE 311-D: DROP ARRANGEMENT FOR DN100-150 SEWERS
FIGURE 311-C: DROPARRANGEMENT FOR
> DN225 SEWERS
SCREW CAP IFGRAVITY MAININFLOW.
PLAIN TEE (NOCAP) IF PRESSUREMAIN INFLOW
SWEEPTEE
BEND
LONG RADIUS BEND ORCURVE (DEPENDING ONGRADE). REF MRWA-S-104B
NOTES Regarding Figure 311-E:· No reducer required in drop.· Utilise sweep tees if DWV pipework.· Install one bracket above the Tee for
< DN225 pipework. Locate centrally.· Install two brackets above the Tee for
> DN300 pipework.Locate 100 from each end.
DROP PIPESUPPORTBRACKET
DROP PIPESUPPORTBRACKET
BASE
CUT OUT
TABLE LEVEL
CHANNEL Ø =INFLOW SEWER Ø
TABLE LEVEL
CHANNEL Ø =INFLOW SEWER Ø
HAND GRIP APPROVED STEP IRONR REQUIRED FOR WORKERS TO HOLD ON TO
R
3 MINOR ANNOTATION CHANGES SEP 20 CP / GA / RL
INFLOWSEWER Ø
Ø
Ø
TABLE LEVEL
BASE
BASE
PVC DWV / GRP
PVC DWV / PP / GRP
PVC DWV / GRPPVC DWV / GRP
PVC DWV / GRP
PVC DWV / PP / GRP
<100
GRAVITY ORPRESSURE MAIN
PRESSUREMAIN
<100
<100
IF CONCRETE SHAFT
REFER FIG 317-A IF DWV TO PE PRESSURE MAIN
GRP pipework dropheights shall be determinedin consultation with thesupplier. The designer shallconfirm that there issufficient elevation changefor a drop to be fitted.
2 x SEWER Ø
100
100 IF PRESSURE PIPE,ADAPT TO DWV or GRPAS PER TABLE 317-F
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