MIN. 3mm THICK COVER
50mm x 50mm HOT DIP
GALVANISED M.S. ANGLE
PRECAST COVER
MIN. 3mm THICK COVER
50mm x 15mm GALVANISED M.S.
SCREEN AT 30mm C/C FIXED
DEAD ON THE GALVANISED
M.S. HORIZONTAL BARS
SLAB (MIN. 3 NOS.)
50
C28/35 CONCRETE
GROUND LEVEL
GROUND LEVEL
50
200
50
200
200
SCREEN
CHAMBER
A
MAX. 2500
VARIES
A
BENCHING
0250mm
470
D.I./ VITRIFIED CLAY
300
300
40
75
75
PIPE FROM WASTE
SUMP OR GULLY TRAP
300
L
FAL
150
0
60
650
SAND BEDDING
R10 - 225
150
150
150
BOTHWAYS OR BRC A7
OR BRC A7
150
REINFORCEMENT R10-225
BOTHWAYS
650
T.W.L.
75
50
700
650
600
REINFORCEMENT
150
T.W.L.
T.W.L.
MIN.900
150
150
C28/35 CONCRETE
C28/35 CONCRETE
CONCRETE
430mm x 400mm x 300mm
PILES AND FOUNDATION TO PE'S DESIGN
100mm THICK
STRAINER BUCKET
150mm x 150mm OPENING
CONCRETE
SCREED
SECTION C-C
SECTION D-D
100
SECTION B-B
MIN. 3mm THICK ALUMINIUM CHEQUERED
Z
300
STEEL FRAME AND
MIN. 3 x 50mm ALUMINIUM / HOT DIP
GALVANISED MILD STEEL STIFFENER
6mm SQUARE MESH
Z
430
TYPE 304 STAINLESS
PLATE / HOT DIP GALVANISED MILD STEEL
WELDED TO THE PLATE ABOVE
SECTION X-X
SECTION Y-Y
SCALE 1 : 10
400
40
40
SECTION Z-Z
PLAN
DETAILS OF STAINLESS STEEL STRAINER BUCKET
2 Nos 150mm
IN 115mm
x 150mm
OPENING
115mm THICK ENGINEERING BRICKWALL
C
THICK ENGINEERING
WITH CEMENT MORTAR RENDERING
SCALE 1 : 10
BRICKWALL WALL WITH
CEMENT MORTAR
150
150
RENDERING
STANDARD 0600mm
400mm x 430mm x 300mm
CLASS 'H' REINFORCED
STAINLESS STEEL
CONCRETE PIPE
STRAINER BUCKET
0250mm DI/VC
PIPE FROM WASTE
225
900
225
0100mm GALVANISED MILD STEEL RING
SUMP
MIN. 3 x 50mm ALUMINIUM / HOT
H10 GALVANISED MILD STEEL BAR BENT TO SHAPE
DIP GALVANISED MILD STEEL
0250mm PIPE
IN 150mm
D
DI/VC PIPE
STIFFENERS
50
0150mm
THICK
225
OW
L
F
CONCRETE
SURROUND
150
150
800
B
700
0
67
SLOPE
FLOW
1 : 50
OUTLET
FLOW
B
DETAILS OF PRECAST COVER SLAB
INLET
WITH LIFTING RING
150
150mm THICK CONCRETE
INLET
X
X
150
4
7
0
D
225
R 1
030
SCALE 1 : 10
60
R3
GRADE 25 SURROUND
NOTES
STANDARD 135mm THICK
150
01800mm PRECAST
1. BOTH ALUMINIUM CHEQUERED PLATE AND HOT DIP GALVANISED MILD STEEL
CAN BE USED TO FABRICATE THE GREASE TRAP COVER. HOWEVER BOTH THE
150
CHAMBER RING
WALL REINFORCEMENT TO PE'S DESIGN
COVER AND STIFFENERS MUST BE OF THE SAME MATERIAL. THE MILD STEEL
Y
KEY HOLE
COVER MUST ONLY BE GALVANISED AFTER THE STIFFENERS ARE WELDED TO
THE COVER.
C
2. IF THE CIRCULAR GREASE TRAP IS TO BE SITED ON AREA WHERE IT IS
2- 150mm x 150mm OPENING
IN 115mm THICK ENGINEERING
(STIFFENERS
SUBJECTED TO VEHICULAR LOADING, THE STRUCTURAL DESIGN OF THE
MIN. 3 x 50mm ALUMINIUM / HOT
NOT SHOWN)
MORTAR RENDERING
GREASE TRAP WILL HAVE TO BE CARRIED OUT BY PROFESSIONAL ENGINEER.
DIP GALVANISED MILD STEEL
BRICKWALL WITH CEMENT
STIFFENERS
3. INFLOW TO THE GREASE TRAP SHALL NOT INCLUDE RAIN WATER.
Y
4. THE OWNER/DEVELOPER SHOULD MAINTAIN THE GREASE TRAP REGULARLY
TO ENSURE THAT DISCHARGE TO THE SEWER SHALL CONTAIN NO MORE
THAN 100mg/l OF GREASE OR OIL.
MIN. 3mm THICK ALUMINIUM
CHEQUERED PLATE OR
SECTIONAL PLAN A-A
MIN. 3mm THICK HOT DIP
GALVANISED MILD STEEL
5. OIL, GREASE, SLUDGE ETC. COLLECTED IN THE GREASE TRAP SHALL BE REMOVED
AND DISPOSED OF ONLY BY LICENSED WASTE COLLECTOR.
PLATE WELDED TO
STIFFENERS
6. SOLID WASTE TRAPPED BY SCREEN & STRAINER SHALL BE REMOVED FREQUENTLY
AND DISPOSED OF PROPERLY.
PLAN VIEW OF ALUMINIUM CHEQUERED PLATE COVER
SCALE 1 : 10
ALL DIMENSIONS ARE IN mm.
SCALES
ISSUED :
DEC 2021
1 : 20
STANDARD CIRCULAR GREASE TRAP
UNLESS
OTHERWISE
LAST REVIEWED :
[ ORIGINAL BORDER SIZE 810mm X 565mm ]
NOV 2021
STATED
(CAPACITY EQUIVALENT TO NS 4 OF BS EN 1825)
WATER RECLAMATION (NETWORK) DEPARTMENT
DRG.
DRG. NO.
NO.
PUB/WRN/STD/040B