15 mm PARGING
15 M @ 150 mm O.C. BOTH WAYS
DRAGGING HOOK
BOTM. FACE
3-15 M @ 50 mm O.C.
FRAME AND COVER
AS SPECIFIED
C
C
1.
2m
300
MAX. 300 mm OF BRICK OR
PRECAST ADJUSTMENT UNITS.
300
D
ASTM C478
1.
2m
D
ALL JOINTS WATERTIGHT
WITH APPROVED SEAL.
OUTSIDE TO BE GROUTED
300
FOR FULL CIRCUMFERENCE
25 mm EMBCO MORTAR
OR EQUAL
300
A
SQUARED END
150
B
15 M @ 230 m m O.
C.HORI
Z.
15 M @ 460 m m O.
C.VERT.
I
N ALL W ALLS
3-15 M @ 50 mm O.C.
300
SECTION
MIN.
150
150
SLAB REINFORCING
300
PLAN
OPTIONAL PRECAST FLAT TOP
AS PER A.S.T.M-C-478 FOR
SHALLOW MAINTENANCE HOLE
MI
N.1.
2m
915
1.2 m
MIN.
A
300
150
B
150
TYPICAL 15 M
225
B
B
A
DOWELS 460 mm O.C.
LAP 24 DIA. 175 mm
300
INTO BASE
A
SECTION
SECTION
SECTION
D
C
NOTES:
1. CONCRETE TO BE 32 MPa AT 28 DAYS CAST IN PLACE
WITH 5-7% AIR ENTRAINMENT.
2. REINFORCING STEEL TO BE 350 MPa DEFORMED BARS
MINIMUM COVER TO BE 50 mm LAP 24 BAR DIA.
3. FIRST STEP TO BE 75 to 300 mm BELOW FRAME.
LAST STEP TO BE 300 mm ABOVE BENCHING OR
600mm ABOVE INVERT IF NO BENCHING.
4. ALL BOXES FOR FUTURE SEWERS TO HAVE 50 mm x 100 mm
KEYWAY ON ALL SIDES.
5. TOP OF BENCHING TO BE SLOPED TO A MAXIMUM OF 8:1.
6. PARGING MIX ON ALL BRICK WORK TO BE 1:3 MORTAR MIX.
A DIMENSION
B
SANITARY SIZE
DIME-
STORM
SIZE
ALTERNATIVE
C
250
300
375
450
NSION
300
515
560
600
650
1675
375
560
600
650
690
1675
450
600
650
690
735
1675
525
650
690
735
780
1675
600
690
735
780
825
1750
675
735
780
825
870
1830
750
780
825
870
915
1905
825
825
870
915
960
1980
900
870
915
960
1000
2135
975
915
960
1000
1045
2210
1050
960
1000
1045
1090
2285
1200
1045
1090
1135
1180
2435
1350
1135
1180
1225
1270
2590
1500
1225
1270
1315
1360
2740
1650
1315
1360
1400
1445
2895
1800
1400
1445
1490
1535
3125
1950
1490
1535
1580
1625
3275
2100
1580
1625
1670
1715
3455
AND APPLIED 15 mm THICK.
7. WATERPROOFING OVER PARGING TO BE TWO HEAVY COATS
OF BITUMEN.
ALL DIMENSIONS ARE IN mm
All dimensions are in millimetres unless otherwise shown.
ENGINEERING AND CONSTRUCTION SERVICES STANDARD DRAWING
REV 1
APR 2013
TYPICAL DUAL MAINTENANCE HOLE
WITH PRECAST STACK
T-701.013-3
(STRAIGHT RUNS ONLY)
NTS
SHEET 1