03 drawings stormwater drainage

ANNEXURE T - DRAWINGS
PART A
CONTRACT NUMBER: TGPWRANDFC2
CONSTRUCTION OF STORM-WATER CONTROL
SYSTEM AT WESTERN TVET COLLEGE,
RANDFONTEIN CAMPUS IN RANDFONTEIN,
GAUTENG

PROPOSED BEANY BLOCK
ACCESS COVER AND FRAME INLET
SEE DRAWING No.
DBI-CE-2024-SWD-02 SHEET 3 OF 4
FOR DETAIL
HENRY KELLY STREET
K
I
E
W
I
E
T
S
T
R
E
E
T
PROPOSED WALKWAY CANOPY
EXISTING BUILDINGS
EXISTING BUILDINGS
EXISTING BUILDINGS
PROPOSED 450mmØ UNDERGROUND PIPE
PROPOSED MANHOLE
SPACED AT A MIN. SPACING OF 50m
AND MAX. OF 80m SEE DRAWING No.
FOR DETAIL
CONNECT TO
EXISTING MANHOLE
EXISTING BUILDING
EXISTING BUILDING
EXISTING BUILDING
PROPOSED BLOCK
PEDESTRIAN
CROSSING (RTM4)
SEE DRAWING No.
DBI-CE-2024-R-03
FOR DETAIL
PROPOSED STOP END TOP UNIT (RH)
PATRYS
AVE.
YIELD LINE
(RTM2)
YIELD LINE
(RTM2)
YIELD LINE
(RTM2)
ACCESS COVER AND
FRAME INLET
SEE DRAWING No.
DBI-CE-2024-SWD-02 SHEET
3 OF 4 FOR DETAIL
EXISTING
SURFACE
PROPOSED
ACCESS
GATE
PROPOSED
ACCESS GATES
PROPOSED CANOPIES
WITH AN EXTENSION
OF 2.1M WIDE
WALKWAY (80mm
INTERLOCKING
PAVING BLOCKS)
PROPOSED PRECAST
CONCRETE KERBS (FIG.3)
PROPOSED
BEANY BLOCKS
SEE DRAWING No.
DBI-CE-2024-SWD-02
SHEET 1 OF 4
FOR DETAIL
PROPOSED CONCRETE
EXTENSION TO THE
BEANY BLOCKS
SEE DRAWING No.
DBI-CE-2024-SWD-02
SHEET 1 OF 4 FOR
DETAIL
PROPOSED BEANY BLOCKS
SEE DRAWING No. DBI-CE-2024-SWD-02
SHEET 1 OF 4 FOR DETAIL
PROPOSED MANHOLE
FOR DETAIL
PROPOSE
D
350mmØ
UNDERGR
OUND
PIPE
PROPOSED BEANY BLOCK ACCESS
COVER AND FRAME INLET
SEE DRAWING No.
FOR DETAIL
PROPOSED 5m WIDE
INTERNAL ROAD
SEE DRAWING No.
DBI-CE-2024-R-01
FOR ROAD LAYERS
450mmØ
PROPOSED BEND
(MANHOLE)
SEE DRAWING No.
DBI-CE-2024-SWD-02
SHEET 4 OF 4 FOR
DETAIL
450mmØ
PROPOSED PRECAST CONCRETE
KERBS (FIG.8 (a)-(b)) SABS 927:1969
INFRASTRUCTURE DEVELOPMENT FOR
WESTCOL TVET COLLEGE :
RANDFONTEIN CAMPUS
Z:1_Projects2024 - Infrastructure Development At WestCol TVET College06_DrawingsCivilDWGRandfonteinNew DrawingsSDPsDBI-CE-2024-SDP_00. Rev00.dwg
PLOT DATE: 04/05/2021 10:33 AM
Berkley Office Park, Unit 8
8 Bauhinia Road
Highveld Techno Park, 0157
email: info@dbiconsulting.co.za
Telephone: (012) 665 0289
Fax: 086 538 4363
www.dbiconsulting.co.za
Private Bag X17, RANDFONTEIN, 1760
email: ceo@westcol.co.za
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
FOR TENDER PURPOSES ONLY
Drawing Description:
SITE DEVELOPMENT PLAN
No. Description Date
REVISIONS
00 30/11/2020
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
Pr Tech. Prof Reg No:
NAME: Prof Reg No:
T. MPONTSHANE 2019401289
MARCH 2021
MARCH 2021
S. KRITZINGER Senior Draughtsperson
Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-SDP-00
............5_LogosWestCol 1.jpg
DBI CONSULTING ENGINEERS
Date:
00
DESIGNED
CHECKED
INFORMATION OFFICE CHECKED
DESIGN OFFICE APPROVAL
NAME: Pr Tech. Prof Reg No:
M. MASHAMBA 201420107
SIGNATURE: DATE: MARCH 2021
M. DITIBANE 2018300061
SIGNATURE: DATE: -
Project Description:
MAY 2021 N.T.S.
SHEET 0 OF 0
Candidate

SEE DRAWING No.
FOR DETAIL
EXISTING BUILDINGS
EXISTING BUILDINGS
EXISTING BUILDING
EXISTING BUILDING
PROPOSED BLOCK
PEDESTRIAN
CROSSING (RTM4)
SEE DRAWING No.
DBI-CE-2024-R-03
FOR DETAIL
YIELD LINE
(RTM2)
YIELD LINE
(RTM2)
YIELD LINE
(RTM2)
ACCESS COVER AND
FRAME INLET
SEE DRAWING No.
3 OF 5 FOR DETAIL
EXISTING
SURFA
CE
PROPOSED
ACCESS
GATE
PROPOSED
ACCESS GATES
PROPOSED CANOPIES
WITH AN EXTENSION
OF 2.1M WIDE
WALKWAY (80mm
INTERLOCKING
PAVING BLOCKS)
SHEET 1 OF 5
FOR DETAIL
SHEET 1 OF 5 FOR
DETAIL
PROPOSED 5m WIDE
INTERNAL ROAD
SEE DRAWING No.
DBI-CE-2024-R-01
FOR ROAD LAYERS
PROPOSED PRECAST CONCRETE
KERBS (FIG.8 (a)-(b)) SABS 927:1969
200 2.500 2.500 200
1. SURFACE: 40mm DOUBLE SEAL SURFACE TREATMENT (SLURRY)
2. BASE LAYER: 150mm THICK, G5 NATURAL GRAVEL COMPACTED TO 95% MOD. AASTHO DENSITY (MIN CBR = 45)
3. SUBBASE LAYER: 150mm THICK, C4 (OF AT LEAST G6 NATURAL GRAVEL), STABILIZED WITH 3% OPC AND
COMPACTED TO 95% MOD. AASTHO DENSITY - MAXIMUM PI NOT EXCEED 6 AFTER STABILIZATION
4. ROAD BED LAYER: 150mm THICK, G9 GRAVEL SOIL COMPACTED TO 93% MOD. AASTHO DENSITY (MIN CBR = 7)
5. FILL / IN-SITU (G10), RIPPED AND RECOMPACTED TO 90% MOD. AASHTO (IF IN-SITU DCP CBR < 15%)
C
L
ROAD SECTION AND LAYER WORKS - 5.0m ROADS
Scale: NTS
2%
2%
2%
2% Max 1:5
Max 1:5 190mm x 200mm
Edge Beam
190mm x 200mm
Edge Beam
RANDFONTEIN CAMPUS
Z:1_Projects2024 - Infrastructure Development At WestCol TVET College06_DrawingsCivilDWGRandfonteinNew DrawingsRoadsDBI-CE-2024-R-01.Rev00.dwg
PLOT DATE: 04/05/2021 4:00 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
ROAD LAYOUT PLAN
REVISIONS
00 04/05/2021
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
Scale:
Drawing Number:
DBI-CE-2024-R-01
Date:
DESIGNED
CHECKED
SIGNATURE: DATE: -
Candidate
A1 A
SHEET 0 OF 0
Discipline:
CIVIL
Revision:
Sheet Size:

Edge restraint to kerb
connection
Paving blocks cut to suit
(refer to Detail A 001)
BLOCK TIE-IN TO ASPHALT AND CONCRETE
N.T.S.
Proposed 40mm double seal surface
treatment (slurry) Access Road
Proposed pedestrian walkway
(Interlocking paving blocks)
Block Pedestrian Crossing
BLOCK PEDESTRIAN CROSSING LAYOUT
Detail A
WM5
WM5
RTM2
150
RM1
NO OVERTAKING LINE
RM1 (FOR 18m, MIN IS 9m)
BLOCK PEDESTRIAN
CROSSING RTM4
YIELD LINE
RTM2
YIELD TO
PEDESTRAIN R2.1
W306
W306
R2.1
W
0.3m
0.6m
2.4m
0.3m
4.5m
WIDE
3m
2.25m
2.25m
DIRECTIONAL TACTILES
MOUNTABLE KERB
FIG. 8C
0.6m
A
001
RANDFONTEIN CAMPUS
Z:1_Projects2024 - Infrastructure Development At WestCol TVET College06_DrawingsCivilDWGRandfonteinNew DrawingsRoadsDBI-CE-2024-R-03_Rev00.dwg
PLOT DATE: 04/05/2021 4:02 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
BLOCK PEDESTRIAN CROSSING
REVISIONS
A
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-R-03
Date:
A
DESIGNED
CHECKED
SIGNATURE: DATE: -
MAY 2021 AS SHOWN
SHEET 0 OF 0
Candidate
04/05/2021
Issued for Tender
Discipline:
CIVIL

HENRY KELLY STREET
K
I
E
W
I
E
T
S
T
R
E
E
T
EXISTING BUILDINGS
EXISTING BUILDINGS
EXISTING BUILDINGS
PROPOSED 450mmØ UNDERGROUND PIPE
CONNECT TO
EXISTING MANHOLE
EXISTING BUILDING
EXISTING BUILDING
EXISTING BUILDING
PATRYS
AVE.
EXISTING
SURFACE
PROPOSED PRECAST
CONCRETE KERBS (FIG.3)
SABS 927:1969
300mmØ
UNDERGR
OUND
PIPE
450mmØ
450mmØ
2%
F
a
l
l
F
a
l
l
F
a
l
l
Fall
Fall
Fall
Fall
Fall Fall
Fall
Fall
EXISTING COMBI
COURT
Fall
PROPOSED PRECAST
CONCRETE KERBS (FIG.8
(a)-(b)) SABS 927:1969
Fall
F
a
l
l
SEE DRAWING No.
DBI-CE-2024-SWD-02 SHEET 3 OF
5FOR DETAIL
PROPOSED MANHOLE
FOR DETAIL
PROPOSED STOP END TOP UNIT (RH)
ACCESS COVER AND
FRAME INLET
SEE DRAWING No.
3 OF 5 FOR DETAIL
PROPOSED
BEANY BLOCKS
SEE DRAWING No.
DBI-CE-2024-SWD-02
SHEET 1 OF 5
FOR DETAIL
PROPOSED CONCRETE
EXTENSION TO THE
BEANY BLOCKS
SEE DRAWING No.
DBI-CE-2024-SWD-02
SHEET 1 OF 5 FOR
DETAIL
SEE DRAWING No. DBI-CE-2024-SWD-02
SHEET 1 OF 5 FOR DETAIL
PROPOSED MANHOLE
FOR DETAIL
PROPOSED BEANY BLOCK ACCESS
COVER AND FRAME INLET
SEE DRAWING No.
FOR DETAIL
PROPOSED BEND
(MANHOLE)
SEE DRAWING No.
DBI-CE-2024-SWD-02
SHEET 4 OF 5 FOR
DETAIL
PROPOSED
WALKWAY CANOPY
PROPOSED BLOCK
PEDESTRIAN
CROSSING (RTM4)
SEE DRAWING No.
DBI-CE-2024-R-03
FOR DETAIL
PROPOSED
WALKWAY CANOPY
RANDFONTEIN CAMPUS
Z:1_Projects2024 - Infrastructure Development At WestCol TVET College06_DrawingsCivilDWGRandfonteinNew DrawingsStormwaterDBI-CE-2024-SWL-01. Rev00.dwg
PLOT DATE: 04/05/2021 4:13 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
STORMWATER LAYOUT PLAN
REVISIONS
00 04/05/2021
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
Scale:
Drawing Number:
DBI-CE-2024-SWL-01
Date:
DESIGNED
CHECKED
SIGNATURE: DATE: -
Candidate
Revision:
Sheet Size:
A1 A
SHEET 0 OF 0
Discipline:
CIVIL

PLAN
Scale 1:10
75
555
125
50
120
35 380 35
245
80
250
290 80
450
50
210
130
80
25
10
160
100
15
170
R50
170
60
CONCRETE PAVEMENT
Scale 1:10
CONCRETE GRADE AS FOR
ADJACENT PAVEMENT
EXPANSION JOINT WITH
SEALANT TO ENGINEERS
SPECIFICATION
CONCRETE
SLAB
MOVEMENT JOINT
150
GRASS VERGE
MIN 2% SLOPE
BLOCK PAVING
Scale 1:10
GRASS VERGE
EDGE BLOCK CUT TO FIT
80mm GREY INTERLOCKING
BLOCKS (S-A TYPE) LAYED IN
HERRINGBONE PATTERN
LAYING COURSE
MIN 2% SLOPE
1. SURFACE: 125MM THICK CONCRETE LAYER, 20MPA
2. BASE LAYER: 150mm THICK, G6 GRAVEL SOIL COMPACTED TO 93% MOD. AASTHO DENSITY (MIN CBR = 7)
3. RIPPED AND RECOMPACTED TO 90% MOD. AASHTO
CONCRETE PAVING LAYER WORKS
Scale 1:10
RANDFONTEIN CAMPUS
Z:1_Projects2024 - Infrastructure Development At WestCol TVET College06_DrawingsCivilDWGRandfonteinNew DrawingsStormwaterDBI-CE-2024-SWD-02_1 OF 5_Rev00.dwg
PLOT DATE: 04/05/2021 4:05 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
BEANY BLOCK DETAILS
REVISIONS
A 04/05/2021
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
DBI CONSULTING ENGINEERS DESIGNED
CHECKED
SIGNATURE: DATE: -
Candidate Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-SWD-02
Date:
A
MAY 2021 AS SHOWN
SHEET 1 OF 5
Discipline:
CIVIL

TABLE 1
Do < 900mm
900mm < 0 <1800mm
DEPTH (d)
150mm
200mm
REINFORCING
MIN.
COVER
40mm
40mm Ø
mm mm
450
525
600
675
750
825
900
1050
1200
1350
1500
1650
1800
75D
COVER (m)
0.6
50D
Ø
525
600
675
750
825
900
1050
1200
1350
1500
1650
1800
COVER (m)
450
TABLE 2
PIPE CLASSES FOR PIPES UNDER SECONDARY STREETS, LIGHT ACCESS
ROADS, PARKING AREAS, PRIVATE ENTRANCES AND SIDEWALKS FOR 40kN
WHEEL LOAD WITH DUE ALLOWANCE FOR IMPACT LOADS.
PIPE CLASSES FOR PIPES UNDER ROUTES FOR H8 - WHEEL LOADS OF EIGHT
80kN WHEEL LOADS WITH DUE ALLOWANCE FOR IMPACT LOADS.
TRENCH
WIDTH
TRENCH
WIDTH
CONCRETE SLAB:
CLASS 25/19 CONCRETE
REF. No 245 WELDED
MESH
REF. No 311 WELDED
MESH
950
1020
1620
1710
1790
1870
1950
2120
2280
2450
2610
2760
3260
0.9 1.0 1.2 1.5 1.8 2.0 2.5 3.0 4.0 5.0
75D 75D 75D 75D 75D 75D 75D 75D
50D 50D
75D 75D 75D 75D 75D 75D 75D
50D 50D 50D 50D 50D
50D 50D 50D 50D 50D
50D 50D 50D 50D
50D 50D 50D 50D 50D
50D 50D 50D 50D
50D 50D 50D 50D 50D 50D
50D 50D 50D 50D 50D 50D 50D
50D 50D 50D 50D 50D 50D 50D
50D 50D
50D
50D
50D
50D
50D
50D
50D
50D
50D 50D 50D 50D 50D
75D 75D 75D 75D
75D
75D
75D
75D
75D
75D
75D
75D
75D
75D 75D 75D 75D 75D 75D
75D 75D 75D 75D
75D 75D 75D 75D 75D
75D
75D
75D
75D
75D
75D
75D
75D
75D
75D
75D 75D
75D
75D
75D 75D 75D
75D 75D 75D
75D 75D
75D 75D 100D
100D
100D 100D 100D
100D
100D
100D 100D
100D 100D
100D
100D
100D 100D 100D
100D
100D
100D
100D 100D
100D 100D 100D
100D
100D
100D
6.0 mm mm 0.6 0.9 1.0 1.2 1.5 1.8 2.0 2.5 3.0 4.0 5.0 6.0
50D
100D 100D
100D
100D
100D
100D
100D
100D
100D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
75D
100D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
100D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
100D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
50D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
50D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
50D 100D 100D 100D 100D 100D 100D 100D 100D 100D 100D
75D
75D 75D 75D
75D 75D
75D
75D 75D 75D 75D
75D 75D 75D 75D
50D
50D
50D 50D
50D 50D 50D
100D 100D 100D 100D 100D 100D 100D 100D
100D
100D
100D
100D
100D
100D
100D
100D
100D
100D
100D 100D 100D 100D 100D
100D 100D 100D 100D
75D 75D 75D
950
1020
1620
1710
1790
1870
1950
2120
2280
2450
2610
2760
3260
NOTES
1. ALL PIPES BELOW SIDEWALKS & OPEN AREAS
TO BE CLASS 50 'D' EXCEPT WHERE COVER <
2.m ON 1200mm Ø AND GREATER THE CLASS OF
THE PIPES ARE TO BE INCREASED TO 75 'D'.
2. FOR STORMWATER PIPES BELOW STREETS AND
MAIN ROUTES, SEE TABLE 2.
3. THE CONTRACTOR SHALL AT ALL TIMES
ADHERE TO THE SAFETY PRECAUTIONS AS SET
OUT IN SANS 1200 D-1988.
4. IF TRENCHES ARE 200mm WIDER THAN THE
SPECIFIED WIDTH IN TABLE 2,1 IT MAY BE
NECESSARY TO CHANGE THE PIPE CLASS.
5. BEDDING:
a. NORMAL BEDDING ACCORDING TO DETAIL 1.
b. BEDDING ACCORDING TO DETAIL 2.
6. BEDDING MATERIAL:
THE MATERIAL USED CONSISTS OF SELECTED
GRAVEL WITH PI < 6, MUST BE FREE OF STONES
LARGER THAN 20mm, ORGANIC MATERIAL AND
CLAY LUMPS. THE BEDDING MATERIAL AT THE
SIDES OF THE PIPE MUST BE COMPACTED TO
90% MOD. AASHTO DENSITY AFTER THE PIPE
HAS BEEN LAID.
7. BACKFILL TYPE A:
THE MATERIAL USED MUST BE UNIFORM
AND MUST BE COMPACTED TO 90% MOD
AASHTO DENSITY IN LAYERS NOT MORE
THAN 100mm AND MUST BE FREE OF:
a. ROOTS OF TREES, BUILDING RUBBLE AND
ORGANIC MATERIAL.
b. CLAY LUMPS LARGER THAN 75mm.
c. STONES LARGER THAN 20mm.
8. BACKFILL TYPE B:
MINIMUM G9 MATERIAL ACCORDING TO TRH14
CLASSIFICATION COMPACTED TO A MIN. OF
90% MOD. AASHTO DENSITY IN LAYERS NOT
MORE THAN 150mm.
9. MINIMUM PIPE SIZE TO BE 450mm DIAMETER.
10. CONNECTIONS FROM ERVEN TO MUNICIPAL
SYSTEM TO BE 450mm.
LEGEND:
D = PIPE CLASS
Do = INTERNAL PIPE DIAMETER
450mmØ STORMWATER PIPE
UNDERNEATH ROADS, ACCESS ROADS
& PARKING AREAS
1020mm
300
MIN
Do
600mm
MIN
NORMAL ROAD
LAYERS
BACKFILL
TYPE B
DETAIL 4
112mm
UNDER SIDEWALK
1020mm
300
MIN
Do
600mm
MIN
AVAILABLE
BACKFILL
BACKFILL
TYPE A
DETAIL 3
112mm
MIN
75mm
AND
125mm
IN
ROCK
GRANULAR BEDDING
MATERIAL (MIN G2)
GRANULAR BEDDING
MATERIAL (MIN G2)
MIN
75mm
AND
125mm
IN
ROCK
APPROVED EXCAVATED
MATERIAL COMPACTED TO
93% MOD AASHTO DENSITY
IN LAYERS NOT EXCEEDING
150mm THICKNESS
BEDDING DETAILS FOR THE PROPOSED 450mmØ STORMWATER
75 'D' PIPE AS PER SANS 677 FOR SPIGOT AND SOCKET TYPE
UNDERNEATH ROADS, ACCESS ROADS
& PARKING AREAS
1020mm
300
MIN
Do
600mm
MIN
NORMAL ROAD
LAYERS
BACKFILL
TYPE B
DETAIL 2
73mm
UNDER SIDEWALK
1020mm
300
MIN
Do
600mm
MIN
AVAILABLE
BACKFILL
BACKFILL
TYPE A
DETAIL 1
73mm
MIN
75mm
AND
125mm
IN
ROCK
GRANULAR BEDDING
MATERIAL (MIN G2)
GRANULAR BEDDING
MATERIAL (MIN G2)
MIN
75mm
AND
125mm
IN
ROCK
APPROVED EXCAVATED
MATERIAL COMPACTED TO
93% MOD AASHTO DENSITY
IN LAYERS NOT EXCEEDING
150mm THICKNESS
BEDDING DETAILS FOR THE PROPOSED 300mmØ STORMWATER
75 'D' PIPE AS PER SANS 677 FOR SPIGOT AND SOCKET TYPE
RANDFONTEIN CAMPUS
PLOT DATE: 04/05/2021 4:06 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
BEDDING OF STORMWATER PIPES
REVISIONS
A
DRAWN
SIGNATURE:
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DATE:
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DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-SWD-02
Date:
A
DESIGNED
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SHEET 2 OF 5
Candidate
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Issued for Tender
Discipline:
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230
230mm BRICK WALL
REINFORCEMENT (a) Y12 AT
150c/c BOTH WAYS, 25 COVER
(b) 110c/c FOR MAIN BARS
WHERE SLAB IS UNDER
ROADWAY
PREFERRED 450
MAX. 600
CONCRETE SURROUNDS
TO MANHOLE
900x900 SHAFT 230
BENCHING
75 230 1200 230 75
1200
150
150
MIN.
900
IN
ROADS
SECTION THROUGH BEANY BLOCK
INLET
(SEE NOTE 6)
STEP IRONS TO BS 1247
AT 300c/c, STAGGERED
200
1310
PLAN - TOP COVER SLAB
TOP ACCESS BLOCK
COVER TO
MANUFACTURER'S
SPECIFICATIONS
1310
450
500 500
BEANY BLOCKS LAID
IN 500MM LENGTHS
TO MANUFACTURER'S
SPECIFICATIONS
450
DOUBLE MESH REF 393 - TOP AND
BOTTOM WITH A COVER OF 30MM
200MM THICK SLAB
DOUBLE MESH REF 393 - TOP AND
BOTTOM WITH A COVER OF 30MM
BEANY BLOCK TOP ACCESS COVER
TO MANUFACTURER'S
SPECIFICATIONS
250MM THICK CONCRETE SLAB
2% MIN
SLOPE
2%
MIN
SLOPE
REFER TO DRAWING No. DBI-CE-2024-DT-05(R)
BENCHING
FLOW
300
MAX.
60 deg
MAX.
BENCHING
230 VARIES MIN. 1200 230
BENCHING
230
VARIES
MIN.
900
230
SECTIONAL PLAN
RANDFONTEIN CAMPUS
PLOT DATE: 04/05/2021 4:06 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
BEANY BLOCK INLET DETAILS
REVISIONS
A 04/04/2021
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
CHECKED
SIGNATURE: DATE: -
Candidate Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-SWD-02
Date:
A
MAY 2021 N.T.S.
SHEET 3 OF 5
Discipline:
CIVIL

REFER TO DRAWING No. DBI-CE-2024-SWD-02 SHEET 5 OF 5
BENCHING
FLOW
300
MAX.
60 deg
MAX.
BENCHING
230 VARIES MIN. 1200 230
BENCHING
230
VARIES
MIN.
900
230
SECTIONAL PLAN
NOTES:
1. CONCRETE STRENGTH TO BE AS FOLLOWS:
a. MANHOLE SURROUNDS AND BENCHING: CLASS 15/19
b. CAST IN-SITU DECK SLABS AND FOUNDATION: CLASS 20/19
c. PRECAST COVER SLABS AND OTHER ITEMS: CLASS 25/19
d. CAST IN-SITU KERBS, APRONS ETC.: CLASS 25/19
2. ALL FLOORS AND BENCHING TO BE STEEL TROWELLED WITH A SMOOTH
RADIUS.
3. ALL BRICKS TO BE OF QUALITY FBSE 30 TO SANS 227-2007, WITH WATER
ABSORPTION < 14% AND EFFLORESCENCE <10.
4. ALL BRICKWORK TO BE IN ENGLISH BOND.
5. MANHOLE AND KERB INLETS WIDTHS AND DEPTH:
a. WIDTH:-
750mm PIPES AND LESS -900mm.
b. SOME JUNCTION MANHOLE SIZES TO BE DETERMINED ON SITE.
c. DEPTH:-
THE DEPTH INDICATED SHOULD BE INCREASED IF NECESSARY FOR
ANGLE AND JUNCTION MANHOLES TO PERMIT SUFFICIENT
DISCHARGE HEAD TO DEVELOP.
d. MANHOLE DEPTH > 1,75m, WIDTH OF BRICKWORK TO BE INCREASED
TO 330mm.
6. FOR NEW INSTALLATION AND REPLACEMENT MANHOLE
SPECIFICATIONS USE APPROVED NON-METALLIC MANHOLE COVERS
AND FRAMES IN COMPLIANCE WITH SANS 1882 -2003 OR SANS 50124 -
1994 (EN 124 - 1994).
4 Y12 @ 110 c/c
25 COVER
4 Y12 @ 110 c/c
2 Y16
4 Y12 @ 110 c/c
2 Y16
4 Y12 @ 110 c/c
1310
REINFORCEMENT DETAIL FOR COVER SLAB
1310
1
0
0
0
1
0
0
0
230
230mm BRICK WALL
REINFORCEMENT (a) Y12 AT
150c/c BOTH WAYS, 25 COVER
(b) 110c/c FOR MAIN BARS
WHERE SLAB IS UNDER
ROADWAY
PREFERRED 450
MAX. 600
CONCRETE SURROUNDS
TO MANHOLE
900x900 SHAFT 230
M.H. COVER AND FRAME TO
SANS 558-1973 (TYPE 6 IN
SIDEWALKS AND STANDS -
TYPE 2A IN ROADS)
STEP IRONS TO BS 1247
AT 300c/c, STAGGERED
BENCHING
75 230 1200 230 75
1200
150
150
MIN.
900
IN
ROADS
SECTION THROUGH SHALLOW MANHOLE
WITH SHAFT
(SEE NOTE 6)
RANDFONTEIN CAMPUS
PLOT DATE: 04/05/2021 4:07 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
MANHOLE DETAILS FOR CONDUIT < 750mmØ
REVISIONS
A 04/05/2021
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
CHECKED
SIGNATURE: DATE: -
Candidate Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-SWD-02
Date:
A
MAY 2021 N.T.S.
SHEET 4 OF 5
Discipline:
CIVIL

L
BENCHING
L2
L1
FIGURE 1
H
1
H
2
H
2
/2
D
0
D
1
FORMULAE:
D0 = DISCHARGE DIAMETER
D1 = OUTLET DIAMETER
V0 = DISCHARGE VELOCITY
V1 = LANDING VELOCITY IN CHAMBER
L1 = LENGTH OF TOP WATER PROFILE OF JET
L2 = LENGTH OF BOTTOM PROFILE OF JET
H1 = HEIGHT BETWEEN SOFFIT OF INLET TO INVERT OF OUTLET
H2 = HEIGHT BETWEEN INVERT OF INLET TO INVERT OF OUTLET
L = LENGTH OF STEPPED MANHOLE
1. ADJUSTING MANHOLE LENGTH TO AVOID EROSION:
THE JET OF WATER DISCHARGED FROM THE UPSTREAM PIPES LOSES VELOCITY AND THEREFORE
EXPANDS. THE DISCHARGE REMAINS THE SAME AND THUS Q = AV APPLIES. THE DISTANCE FROM
THE INLET TO THE OUTLET TO THE CHAMBER MUST TAKE THIS INTO ACCOUNT, EITHER IN HEIGHT
TO ACCOMMODATE THE VELOCITY HEAD OR IN INCREASED DIAMETER LEADING TO THE
DOWNSTREAM PIPE.
V1 =
L1 =
L2
L
=
=
(2g(H1 - D0/2))0.5
V (2H1/g)0.5
V(2H2/g)0.5
L1 - D1/4
2. BENCHING FOR STEPPED MANHOLES:
BENCHING IN THE MANHOLE IS TO FOLLOW THE BOTTOM PROFILE OF THE FREE JET UP TO H2/2,
BEYOND WHICH THE PROFILE IS REVERSED. THE COORDINATES OF THE PROFILE ARE
DETERMINED BY CALCULATING ΔL VS ΔH USING THE FORMULA FOR L2.
THE ENTRANCE SHOULD BE ROUNDED TO AVOID ENTRY LOSSES AS MUCH AS 50% OF THE ENERGY
HEAD, RESULTING IN AN EVEN HIGHER WATER LEVEL IN THE CHAMBER. IN THIS SITUATION
h = (V²/2G)0.5
STILL APPLIES.
NOTES:
1. TOPOGRAPHY OFTEN REQUIRES STEPPED
MANHOLES TO REDUCE THE VELOCITY IN
THE PIPED STORMWATER SYSTEM.
2. THESE STRUCTURES REQUIRE CAREFUL
CONSIDERATION TO AVOID DESTRUCTION
OF THE CHAMBER WALL OPPOSITE THE
DISCHARGE POINT. THERE IS NO MORTAR
THAT CAN STAND UP TO THE EROSIVE
FORCE OF WATER POUNDING ON THE
JOINTS OF THE BRICKWORK IN THE
CHAMBER, IN FACT OVER A PERIOD OF
TIME, EVEN CONCRETE WILL
DETERIORATE. THE TROUBLE IS THAT BY
THE TIME THE DEGRADATION BECOMES
APPARENT, MUCH DAMAGE HAS BEEN
DONE.
3. THE JRA HAS ADOPTED DESIGN CRITERIA
THAT WILL LIMIT THE DAMAGE TO
STEPPED MANHOLES AND IS DESCRIBED
ON THIS DRAWING.
RANDFONTEIN CAMPUS
PLOT DATE: 04/05/2021 4:08 PM
8 Bauhinia Road
Telephone: (012) 665 0289
Fax: 086 538 4363
Telephone: (011) 692 4004
Fax: (011) 692 3404
www.westcol.co.za
DESIGN OF STEPPED MANHOLES
REVISIONS
A 04/05/2021
Issued for Tender
DRAWN
SIGNATURE:
NAME:
DATE:
SIGNATURE:
NAME:
DATE:
SIGNATURE: DATE:
Pr Tech.
MARCH 2021
NAME: Prof Reg No:
MARCH 2021
MARCH 2021
CHECKED
SIGNATURE: DATE: -
Candidate Scale:
Revision:
Sheet Size:
A1
Drawing Number:
DBI-CE-2024-SWD-02
Date:
A
MAY 2021 N.T.S.
SHEET 5 OF 5
Discipline:
CIVIL

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