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Crown Copyright and database rights 2019. OS 100031961.
2
0
0
0
2m offset from
existing boathouse
8308
17
00
0
30
0
30
0
23082000 2000
2000 2308 2000
001 / 04 Schematic Elevation - Hoveton Marsh Fish Barrier
(1:100)
Gate
Overhanging branches
to be cut-back in
advance of piling works
Alignment of fish barrier set out
to avoid tree trunks and root balls
as is reasonably possible. Tree
removal to be assessed.
001 / 03 Schematic Plan - Layout of Piles for Hoveton Marsh Fish Barrier
(1:100)
100
UBP steel piles
(cut-off 300mm above bank level)
Screen
(extending 100mm above bank level)
Timber cill
Timber board
side wall cut-off
1200 screen heightStop-boarded Stop-boarded
Existing profile
12
00
20
0
12
00
10
00
10
00
10
00
12
00
17
32
10
0
Water depths recorded on
27th Aug 2019
2000
2000
Very loose fine to
medium SAND
Plastic amorphous
PEAT
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Soft grey silty CLAY.
Plastic amorphous
PEAT
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Very gravelly fine to
medium SAND. Gravel
angular to subangular.
Soft to firm grey silty CLAY.
River channel locally dredged /
de-silted to suit. Cill boards
inserted to ensure that clear
height above bed >100mm.
Timber cut off to extend well into
PEAT to form effective cut-off.
Horizontal truss formed in
sliding hollow sections
to be site drilled and bolted.
355 UBP Steel piles
(cut-off 300mm above bank level)
305 UBP 88
100kN
UNFACTORED
100kN
UNFACTORED
100kN
UNFACTORED
100kN
UNFACTORED
Horizontal truss formed in
sliding hollow sections
to be site drilled and bolted.
355 305 (see elevations for
weights) UBP steel pile.
Screwpiles to form tension
compression couple. Pile
and Cap designed by
screwpile specialist.
3
0
.0
0
°
Hydraulic cut-off formed 3m into
peat. Subject to further testing of
peat to validate design parameters.
Bed upstream and downstream of screen
desilted, TENSAR TRIAX TX-G Geogrid laid over
peat. 350mm of rip-rap 40mm to 150mm laid
over membranes. Membrane turned up and
lapped back into themselves at upstream and
down stream end. TRIAX Grid to be physically
joined to adjoining sheets using proprietary clips
suitable for the system.
Allow to fixed geogrid to top of cut-off panel using
oak batten (75mm sq) and SS coach bolts.
Cut off suspended on chains
with turn-buckles, to eye bolt
through cut-off panel.
80008000
30
00
Solid oak web infill above top of
cut-off, bolted to Pile using
Stainless Steel Bolt and isolating
sleeve.
UNFACTORED
LOAD AS
INDICATED
ON PLAN
001 / 05 Schematic Section - Fish Barrier Piles
(1:100)
Ground Strata - See GI
Ground Strata - See GI
Bearing piles
Vertical screw piles
Raking screw piles
Waling beam
Eel Traps
-See Drawing 010
25mm steel plate framed each side in Oak on
top and sides, Oak bolted to steelplate using
isolated SS M20 bolts, with nuts and washers
counter bored into sawn oak frame and
isolating sleeve @ 600c/c.
2 No. SS Eye bolt through roadplate and
isolator sleeve, for suspension of plate.
001 / 06 Detail - Hydraulic cut-off
(1:50)
3000
Elevation
Plan
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the
Environment Agency Minimum Technical Requirements
which shall be the Civil Engineering Specification for the
Water Industry (CESWI).
Hoveton Marshes Barrier Location
001 / 01 Location Plan
001 / 02 Site Plan - Hoveton Marshes Fish Barrier
(1:1250)
Access route
Proposed Hoveton Marshes
Fish Barrier
Detailed Design
As shown
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P01 Draft issue 30 / 09 / 19
P02 For consultation 02 / 10 / 19
P03 For consultation 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Location of eel trap & fykes added following
consultation with EA Fisheries.
13/01/21
M.Lakin / J. BLyth
J.Blyth / M.Lakin
Crown Copyright and database rights 2019. OS 100031961.
4
0
0
0
4m offset from
existing barrier
24000
17
00
0
30
0
20002000 4000
2000 2000 2000 2000
17
32
002 / 04 Schematic Elevation - The Dam Fish Barrier
(1:100)
Gate
c. 2m overhang of branches
to be cut-back in advance
of piling works
002 / 03 Schematic Plan - Layout of Piles for The Dam Fish Barrier
(1:100)
4000
2000 2000 2000
2000 2000 20002000
24000
2000 2000
2000 2000
13
00
15
00
2000 2000 2000
15
00
15
00
1600 screen heights 1300 screen heights
Fully
boarded
cut-off
Fully
boarded
cut-off
2000
c.4m overhang of branches
to be cut-back in advance
of piling works
4000
Existing profile
90
0
14
00
14
50
15
0
Screen
(extending 100mm above bank level)
Timber cill
Timber board
side wall cut-off
Water depths recorded on
27th Aug 2019
17
32
Very loose fine to
medium SAND
Plastic amorphous
PEAT
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Soft grey silty CLAY.
Plastic amorphous
PEAT
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Very gravelly fine to
medium SAND. Gravel
angular to subangular.
Soft to firm grey silty CLAY.
355 UBP Steel piles
(cut-off 300mm above bank level)
Vertical and inclined
screwpile to form tension /
compression couple. Pile
and cap designed by
screwpile specialist in mild
steel allowing for corosion
for 15 year design life.
Horizontal truss formed in
sliding hollow sections
to be site drilled and bolted.
305 UBP 88 305 UBP 88305 UBP 88
150kN
UNFACTORED
100kN
UNFACTORED
100kN
UNFACTORED
150kN
UNFACTORED
Horizontal truss formed in
sliding hollow sections
to be site drilled and bolted.
355 305 (see elevations for
weights) UBP steel pile.
Screwpiles to form tension
compression couple. Pile
and Cap designed by
screwpile specialist.
3
0
.0
0
°
Hydraulic cut-off formed 3m into
peat. Subject to further testing of
peat to validate design parameters.
Bed upstream and downstream of screen
desilted, TENSAR TRIAX TX-G Geogrid laid over
peat. 350mm of rip-rap 40mm to 150mm laid
over membranes. Membrane turned up and
lapped back into themselves at upstream and
down stream end. TRIAX Grid to be physically
joined to adjoining sheets using proprietary clips
suitable for the system.
Allow to fixed geogrid to top of cut-off panel using
oak batten (75mm sq) and SS coach bolts.
Cut off suspended on chains
with turn-buckles, to eye bolt
through cut-off panel.
80008000
30
00
Solid oak web infill above top of
cut-off, bolted to Pile using
Stainless Steel Bolt and isolating
sleeve.
UNFACTORED
LOAD AS
INDICATED
ON PLAN
002 / 05 Schematic Section - Fish Barrier Piles
(1:100)
Bearing piles
Vertical screw pile
Raking screw pile
Waling beam
Ground Strata - See GI
Ground Strata - See GI
Alignment of fish barrier set out
to avoid tree trunks and root balls
as is reasonably possible. Tree
removal to be assessed.
River channel locally dredged / de-silted to
suit. Cill boards inserted to ensure that clear
height above bed >100mm. Timber cut off to
extend well into PEAT to form effective cut-off.
Eel Fyke
-See Drawing 011
Eel Fyke
-See Drawing 011
25mm steel plate framed each side in Oak on
top and sides, Oak bolted to steelplate using
isolated SS M20 bolts, with nuts and washers
counter bored into sawn oak frame and
isolating sleeve @ 600c/c.
2 No. SS Eye bolt through roadplate and
isolator sleeve, for suspension of plate.
002 / 06 Detail - Hydraulic cut-off
(1:50)
3000
Elevation
Plan
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
3. SPECIFICATION:
All works to be carried out in accordance with the
Environment Agency Minimum Technical Requirements
which shall be the Civil Engineering Specification for the
Water Industry (CESWI).
002 / 01 Location Plan
002 / 02 Site Plan - The Dam Fish Barrier
(1:1250)
Access route
Proposed
The Dam Fish Barrier
Existing barrier
(To be retained)
Detailed Design
As shown
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
The Dam Barrier Location
Access route for pontoon
P01 Draft issue 30 / 09 / 19
P02 For consultation 02 / 10 / 19
P03 For consultation 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Location of eel trap & fykes added following
consultation with EA Fisheries.
13/01/21
M.Lakin / J. BLyth
J.Blyth / M.Lakin
6
2
0
0
Crown Copyright and database rights 2019. OS 100031961.
6.2m offset from
existing barrier
16308
17
00
0
30
0
2308 2000
2000 2000 2000
003 / 04 Schematic Elevation - Foxborrow Fish Barrier
(1:100)
Gate
c.3m overhang of
branches to be cut-back in
advance of piling works.
3no. trees on water line.
Alignment of fish barrier set out
to avoid tree trunks and root balls
as is reasonably possible. Tree
removal to be assessed.
003 / 03 Schematic Plan - Layout of Piles for Foxborrow Fish Barrier
(1:100)
2000 200023082000
16308
20002000200020002000
16
00
16
00
Existing profile
3000
c.1m overhang of
branches to be
cut-back in advance
of piling works. 1 no.
tree to be removed.
1000
12
00
16
00
20
0
16
00
16
00
16
80
Screen
(extending 100mm above bank level)
Timber cill
Timber board
side wall cut-off
10
0
Water depths recorded on
27th Aug 2019
17
32
2
7
6
9
2000
2000
12
00
Very loose fine to
medium SAND
Plastic amorphous
PEAT
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Soft grey silty CLAY.
Plastic amorphous
PEAT
Medium dense very
gravelly fine to medium
SAND. Gravel angular
to subangular.
Very gravelly fine to
medium SAND. Gravel
angular to subangular.
Soft to firm grey silty CLAY.
River channel locally dredged /
de-silted to suit. Cill boards inserted to
ensure that clear height above bed
>100mm. Timber cut off to extend well
into PEAT to form effective cut-off.
Vertical and inclined
screwpile to form tension /
compression couple. Pile
and cap designed by
screwpile specialist in mild
steel allowing for corosion
for 15 year design life.
3
0
.0
0
°
Horizontal truss formed in
sliding hollow sections
to be site drilled and bolted.
355 UBP Steel piles
(cut-off 300mm above bank level)
305 UBP 88
100kN
UNFACTORED
100kN
UNFACTORED
100kN
UNFACTORED
100kN
UNFACTORED
Horizontal truss formed in
sliding hollow sections
to be site drilled and bolted.
355 305 (see elevations for
weights) UBP steel pile.
Screwpiles to form tension
compression couple. Pile
and Cap designed by
screwpile specialist.
3
0
.0
0
°
Hydraulic cut-off formed 3m into
peat. Subject to further testing of
peat to validate design parameters.
Bed upstream and downstream of screen
desilted, TENSAR TRIAX TX-G Geogrid laid over
peat. 350mm of rip-rap 40mm to 150mm laid
over membranes. Membrane turned up and
lapped back into themselves at upstream and
down stream end. TRIAX Grid to be physically
joined to adjoining sheets using proprietary clips
suitable for the system.
Allow to fixed geogrid to top of cut-off panel using
oak batten (75mm sq) and SS coach bolts.
Cut off suspended on chains
with turn-buckles, to eye bolt
through cut-off panel.
80008000
30
00
Solid oak web infill above top of
cut-off, bolted to Pile using
Stainless Steel Bolt and isolating
sleeve.
UNFACTORED
LOAD AS
INDICATED
ON PLAN
003 / 05 Schematic Section - Fish Barrier Piles
(1:100)
Bearing piles
Vertical screw piles
Raking screw piles
Waling beam
Ground Strata - See GI
Ground Strata - See GI
Eel Trap
(to facilitate
downstream
migration of eels)
Eel Fyke
(to facilitate
downstream
migration of eels)
Eel Fyke
(to facilitate
downstream
migration of eels)
Eel Fyke
(to facilitate
downstream
migration of eels)
Eel Fyke
(to facilitate
downstream
migration of eels)
Eel Fyke
(to facilitate
downstream
migration of eels)
Eel Fyke
-See Drawing 011
Eel Fyke
-See Drawing 011
25mm steel plate framed each side in Oak on
top and sides, Oak bolted to steelplate using
isolated SS M20 bolts, with nuts and washers
counter bored into sawn oak frame and
isolating sleeve @ 600c/c.
2 No. SS Eye bolt through roadplate and
isolator sleeve, for suspension of plate.
003 / 06 Detail - Hydraulic cut-off
(1:50)
3000
Elevation
Plan
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the
Environment Agency Minimum Technical Requirements
which shall be the Civil Engineering Specification for the
Water Industry (CESWI).
003 / 01 Location Plan
003 / 02 Site Plan - Foxborrow Fish Barrier
(1:1250)
Access route
Proposed Foxborrow Dyke
Fish Barrier
Existing barrier
(To be retained)
Detailed Design
As shown
M.Lakin / J. BLyth
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
Hoveton Marshes Barrier Location
Access route for pontoon
P01 Draft issue 30 / 09 / 19
P02 For consultation 02 / 10 / 19
P03 For consultation 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Location of eel trap & fykes added following
consultation with EA Fisheries.
13 / 01 / 21
J.Blyth / M.Lakin
004 / 02 Elevation - Fish Barrier
(1:10)
Sequence of installation:
1. Pre-fit fixed pile wall plates (L) and channels guides (G) to piles (A).
2. Install piles (A). Tolerance +/-50mm
3. Install fenders (C), notching and fixing into fixing to pile wall plates (L)
4. Lower sub-frame screen guide system (E), with pre-fitted cill boards (J) into position, and fix onto fenders (C).
5. Apply timber wedges (I) to prevent excess movement between sub-frame (E) & guides (G).
5. Lower wedge wire screens (F) into position.
30
0
Fre
eb
oa
rd
va
rie
s
c.1
50
- 2
00
mm
004 / 01 Plan - Fish Barrier
(1:10)
2000 (+/- 50mm)
℄pile
℄pile
Ch
an
ne
l d
ep
th
va
rie
s
Min
.
10
0m
m
004 / 03 Plan - Gate
(1:10)
004 / 04 Elevation - Gate
(1:10)
A
A Pile
(steel - UBP)
C Fenders
(timber)
F Removable
wedge-wire screens
(metalwork)
G Fixed guide rail
(metalwork)
E Sub-frame guide
system for screens
(metalwork)
B Screen lifting handle
(stainless steel)
J Cill boards
(timber)
K Dredged sub-grade
D Sub-frame rail
(metalwork)
Bank level
Channel bed level
Cill level
B C D E FG H I
A Pile
(steel - UBP)
F Removable
wedge-wire screens
(metalwork)
G Fixed guide rail
for cill boards (J)
(metalwork)
L RHS Gate frame
(metalwork)
B Screen lifting handle
(metalwork)
J Cill boards
(timber)
K Dredged sub-grade
M Adjustable hinge
(timber)
H Isolating clip (not shown)
Scre
en
h
eig
ht
I Web plate wedges
Cut to suit installation
(timber)
(not shown)
J PFC Waling
(steel)
(not shown)
K Steel Waling / pile connection
Adjustable to for tolerance
(steel UEA)
(not shown)
J KL
L Web plates
(timber)
(not shown)
2000
2308
2200
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the
Environment Agency Minimum Technical Requirements
which shall be the Civil Engineering Specification for the
Water Industry (CESWI).
Detailed Design
As shown
M.Lakin
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P01 Draft issue 30 / 09 / 19
P02 For consultation 02 / 10 / 19
P03 For consultation 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Location of eel trap & fykes added following
consultation with EA Fisheries.
13 / 01 / 21
J.Blyth
005 / 05 Detail - Extruded Weir Strip
(1:1)
19
.8
15.7
5.1
14
.2
1000 grade UHMW polyethylene
wear strip . Ref no. PIE 233 by
Penine (- see www.penine.org) -
or similar approved. Lengths cut
to suit from standard lengths e.g.
10ft, 20ft or coils up to 500ft, in
standard white colour.
Wear strip fixed to screen rail
using stainless steel 4Ø self-
tapping screws @ top, middle &
bottom locations (3no. per side -
6no. total per screen unit).
Dim
en
sio
n A
390
39
0
390
60
5 5
30
40
150
10Ø
120 120
Hoveton Marsh
390mm 1200mm 17 kg 10
The Dam
390mm 1500mm 21 kg 20
390mm 1400mm 20 kg 8
Foxborrow Dyke
390mm 1600mm 22 kg 20
Barriers
390mm 1100mm 15 kg 4Gates
Barriers
Gates
Barriers
Gates 390mm 1500mm 21 kg 4
390mm 1300mm 18 kg 12Barriers
005 / 01 Elevation - Wedge Wire Screen Unit
(1:5)
005 / 01 Side Elevation
- Wedge Wire Screen Unit
(1:5)
005 / 01 Plan - Wedge Wire Screen Unit
(1:5)
005 / 03 Plan
- Wedge Wire Screen Unit
(1:5)
005 / 06 Table - Wedge Wire Screen Sizes
(1:5)
O/A frame width Dimension A Approx frame weightLocation No. of frames
6.35mmØ Cross-rods
28SB wedge wire profile
by Screen Systems
(Wireworkers) Ltd or
similar approved
60mm wide x 5mm deep
rectangular bar
(plastic wear strip not
indicated for clarity)
30mm wide x 5mm deep
rectangular bar
10mmØ bar bent to form handle
Extruded wear strip
Snap on plastic strip to
isolate stainless steel from
dissimilar metal frame
- See Detail 005 / 05
P01 Draft issue for comment 13 / 11 / 19
NOTES:
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. WEDGE WIRE SCREENS:
● Provision & fabrication by:
Screen Systems (Wireworkers) Ltd
Haydock Lane Industrial Estate
Haydock Lane
St Helens
WA11 9UW
01942 272895
or similar approved.
● 28SB (stainless steel gr 316L) WedgeWire
● Aperture Size = 2mm,
● 6.35mmØ cross-rods at 50mm centres.
4. STEELWORK:
● All stainless steel to BS5950.
●All fabricated steelwork structures executed to conform to
BS EN 1090-2.
● All other associated steelwork e.g. solid bar 5mm thk
framing in stainless steel 316L, amply welded to wedge wire.
Welding of wedge wire to framing to be 6FW unless
otherwise stated or other approved.
5. WEAR STRIP:
● 1000 grade UHMW polyethylene wear strip . Ref no. PIE
233 by Penine (- see www.penine.org) - or similar approved.
Lengths cut to suit from standard lengths e.g. 10ft, 20ft or
coils up to 500ft, in standard white colour.
Detailed Design
As shown
M.Lakin
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P02 No issue
P03 No issue
P04 Minor change to drawing layout only 13 / 01 / 21
J.Blyth
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Caution - Sharp Edges
- All sharp edges and burrs to be removed.
Caution - Lifting
- Check adequate lifting facilities & constraints.
Check - All fabricated elements are clean and free
from dust, and burrings on completion.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
!
FABRICATION
!
!
O/A frame width Dimension A Approx frame weightLocation
Hoveton Marsh
1700mm 1400mm kg
No. of frames
3
The Dam
1700mm 1900mm kg 8
Foxborrow Dyke
1700mm 2000mm kg 2
Barriers
Barriers
Barriers
005 / 04 Table - Frame Sizes
(1:5)
1700mm 2200mm kg 3Barriers
006 / 01 Elevation - Frame
(1:5)
1700
Dim
en
sio
n A
1700
10
07
57
5
425 425425
70 325
425
70325
006 / 02 Plan - Frame
(1:5)
006 / 03 Side Elevation - Frame
(1:5)
27
25
Ø
1
4
70
100 x 50 X 10 PFC
75 x 50 UEA
100 x 50 X 10 PFC
75 x 50 UEA
75 x 50 UEA
flange removed locally
100 x 50 X 10 PFC
25 x 100 Timber plate (planed or cut to site
measurement as necessary for fit). D30 oak
countersunk screwed to sub-frame @ 300 c/c.
325
NOTES
1. LEVELS & DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. STEELWORK:
● All steelwork to BS5950.
● All steelwork to be grade S355.
4. FABRICATION:
● Fabrication drawings to be prepared by the fabricator.
●All fabricated structural steelwork structures executed to
conform to BS EN 1090-2.
●Size & fitment of gate components to suit fabrication
tolerances and checked for fit prior to deliver to site.
●All SHS to SHS & SHS to RHS welds to be full continuous
butt welds to suit thickness of member size.
●All plate to section welds full continuous 6FW or
stitch-welded as indicated (e.g. 50 -150: 50weld, 100miss).
5. PAINT SYSTEM:
Either:
● Steelwork to be hot-dipped galvanised:
● Steelwork to be prepared in accordance with the the
Galvanizer's Association Best Practice Guide for Venting
and Draining.
Or:
● Roller applied paint system applied to external areas only.
Applied at the factory / fabrication yard.
● 1no. primer coat of Sigmacover 280 two-part epoxy paint
(grey) or similar to be applied in accordance with
manufacturer's instructions.
● 1no. top semi-gloss coat of Sigmacover 2 two-part epoxy
paint (colour e.g. grey - to be confirmed) or similar to be
applied in accordance with manufacturer's instructions.
● Touch-up application applied on site to cover over excess
sika-flex areas or scratched & / damaged paintwork areas.
Detailed Design
As shown
M.Lakin
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P01 Draft issue comment 13 / 11 / 19
P02 No issue
P03 No issue
J.Blyth
P04 Minor change to drawing layout only 13 / 01 / 21
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Caution - Sharp Edges
- All sharp edges and burrs to be removed.
Caution - Lifting
- Check adequate lifting facilities & constraints.
Check - All fabricated elements are clean and free
from dust, and burrings on completion.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
!
FABRICATION
!
!
Board
length
Board
width
Approx
board weight
Location No.
of boards *
007 / 01 Elevation - Assemble Cill Boards in Frame
(1:5)
007 / 03 End Elevation
- Cill Boards in Frame
(1:5)
Hoveton Marsh
400mm 75mm 6kg 36
The Dam
400mm 75mm 6kg 76
Foxborrow Dyke
400mm 2000mm 6kg 52
Barriers
Barriers
Barriers
007 / 05 Table - Cill Boards
(1:5)
2150mm* 100mm 39kg 3Gates
007 / 02 Plan - Assemble Cill Boards in Frame
(1:5)
Board
depth
200mm
Gates
Gates
3950mm* 200mm 72kg 4Barriers 100mm
1750mm* 100mm 32kg 20Barriers
200mm
200mm
200mm
200mm
200mm
* Subject to site measurement and re-measurement of numbers on site to suit
007 / 04 Plan - Assembled Cill Timbers in Bank Bays
(1:5)
2150mm* 100mm 39kg 2200mm
007 / 04 Plan - Assembled Cill Timbers in Gate Bay
(1:5)
20
0
85
c.7
5
10
07
5
c.2
5
Locking fastener
Glavanised mild steel
countersunk M8 coach screw
Timber wedge to secure stop-log
prior to installing locking fastener
Cill timber
- See 007 / 09-011
Stop-board timber
- See 007 / 06-08
Stop-board timber
- See 007 / 06-08
Stop-board timber
- See 007 / 06-08
Steel frame
- See Drawing 006
Locking fastener
Glavanised mild steel
countersunk M8 coach screw
Timber wedge to secure stop-log
prior to installing locking fastener
Gate cill timber
Projection to suit gate
position to achieve flush fit
2150
1750
007 / 06 Plan - Cill Board
(1:10)
400
75
007 / 07 Side Elevation
- Cill Board
(1:10)
400
200
007 / 08 End Elevation
- Cill Board
(1:10)
200
75
Length - Subject to site measurement
007 / 10 Side Elevation - Gate Cill
(1:10)
Length - Subject to site measurement
007 / 11 End Elevation
- Gate Cill
(1:10)
200
75
007 / 09 Plan - Gate Cill
(1:10)
75
100
25
Subject to site
measurement
NOTES
1. LEVELS & DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. TIMBER
●All timber shall be in accordance with BS5268.
●All timber shall be strength class D30 oak or similar to
provide a durable, robust timber suitable for a target 20 year
design life, service Class 3.
●All timber shall carry the Forest Stewardship Council (FSC)
trademark or other label from an equivalent internationally
recognised, globally applicable, independent certification
scheme for good forest management.
●Tropical hardwood will not be used.
●The purchase of recycled timber is preferable to the
purchase of virgin timber from a waste hierarchy and
resource use perspective. Recycled timber is defined as
timber which is being used for a different purpose than the
purpose for which the tree was originally felled.
●All timberwork shall be subject to site measurement & / or
fabricated elements prior to commencement of cutting
boards.
●All oak timbers to be untreated, relying upon the natural
tannins within the wood.
4. STEELWORK:
● All steelwork to BS5950.
● All steelwork to be grade S355.
Detailed Design
As shown
M.Lakin
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P01 Draft issue for comment 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Cill board lengths adjusted to suit.
13 / 01 /21
J.Blyth
P02 No issue
P03 No issue
Gate
length
Gate
height
Gate weight
(exc. screens)
Location No.
of gates
Hoveton Marsh
Foxborrow Dyke
008 / 05 Table - Gate
(1:5)
2100mm 1600mm 200kg 1Gate
Gate
* Subject to site measurement
2100mm 1200mm 185kg 2 (1 handed)
Gate length
Ga
te
h
eig
ht
2000 (gate clearance)
008 / 02 Elevation - Gate
(1:5)
008 / 01 Plan - Gate
(1:5)
008 / 03 Section - Gate
(1:5)
40 100
50
60
60
c.85
50 32550 50 50 325 50 50 325 50 50 325 50
Ga
te
h
eig
ht
45
Perimeter
60 x 40 X 3 RHS
(Full butt welds)
Screen Guides
100 x 50 PFC
(Cont. 6mm FW to RHS)
Brace
60 x 30 X 3 RHS
(Full butt welds)
Gate perimeter
60 x 40 X 3 RHS
(Full butt welds)
Gate strut
60 x 30 X 3 RHS
(Full butt welds)
Perimeter
60 x 40 X 3 RHS
(Full butt welds)
Perimeter
60 x 40 X 3 RHS
(Full butt welds)
Brace
60 x 30 X 3 RHS
(Full butt welds)
Hinge
Hinge
All dims subject to fabrication
100 x 100 EA with M20 x 75 mm
long threaded hinge pin fully
6FW with locking nyloc nut
10mm thk plate
6mmFW 50mm
stitch welded to RHS
M20 x 150 mm long threaded eye
collar bolt with locking Nyloc nuts
to adjust gate angle
Locking bar
All dims subject to fabrication
100 x 50 PFC
In fill plate
5mm plate
stitch welded
(50-150) 3FW to
gate PFC & RHS
75 notch cut in 60 x 60 x 3 SHS
to accommodate gate locking pin
Locking position
60 x 30 X 3 RHS
(6FW to RHS)
14
0
10
50
20
0
Top of UBP gate post
UBP Pile
100
NOTES
1. LEVELS & DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. STEELWORK:
● All steelwork to BS5950.
● All steelwork to be grade S355.
4. FABRICATION:
● Fabrication drawings to be prepared by the fabricator.
●All fabricated structural steelwork structures executed to
conform to BS EN 1090-2.
●Size & fitment of gate components to suit fabrication
tolerances and checked for fit prior to deliver to site.
●All SHS to SHS & SHS to RHS welds to be full continuous
butt welds to suit thickness of member size.
●All plate to section welds full continuous 6FW or
stitch-welded as indicated (e.g. 50 -150: 50weld, 100miss).
Detailed Design
As shown
M.Lakin
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P01 Draft issue for comment 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Gate posts revised to UBP.
13 / 01 / 21
P02 No issue
P03 No issue
J.Blyth
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Caution - Sharp Edges
- All sharp edges and burrs to be removed.
Caution - Lifting
- Check adequate lifting facilities & constraints.
Check - All fabricated elements are clean and free
from dust, and burrings on completion.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
!
FABRICATION
!
!
Gate
length
Gate
height
Gate weight
(exc. screens)
Location No.
of gates
The Dam
009 / 05 Table - Gate
(1:5)
Gate 4100mm 1500mm 325kg 1
Gate length
Ga
te
h
eig
ht
3646 gate clearance
20
0
009 / 02 Elevation - Gate
(1:10)
009 / 01 Plan - Gate
(1:10)
009 / 03 Section - Gate
(1:10)
40
100
50
60
60
15
00
45
50 50 50
325
50
Perimeter
60 x 40 X 3 RHS
(Full butt welds)
Brace
60 x 30 X 3 RHS
(Full butt welds)
Gate perimeter
60 x 40 X 3 RHS
(Full butt welds)
Gate strut
60 x 30 X 3 RHS
(Full butt welds)
Perimeter
60 x 40 X 3 RHS
(Full butt welds)
Perimeter
60 x 40 X 3 RHS
(Full butt welds)
Brace
60 x 30 X 3 RHS
(Full butt welds)
Hinge
Hinge
All dims subject to fabrication
100 x 100 EA with M20 x 75 mm
long threaded hinge pin fully
6FW with locking nyloc nut
10mm thk plate
6mmFW welded
to RHS
M20 x 150 mm long threaded eye
collar bolt with locking Nyloc nuts
to adjust gate angle
Locking bar
All dims subject to fabrication
60 x 60 x 3 SHS
3mmFW 50-150
stitch welded to
SHS gate post
M20 locking bar with flat plate & lifting
handle to provide double shear locking
position to prevent gate twist
100 x 50 PFC
In fill plate
5mm plate
stitch welded
(50-150) 3FW to
gate PFC & RHS
Brace
60 x 30 X 3 RHS
(Full butt welds)
Gate Post
UBP Pile
75 notch cut in 60 x 60 x 3 SHS
to accommodate gate locking pin
Locking position
60 x 30 X 3 RHS
(6FW to RHS)
4000
14
0
10
50
100
Top of UBP gate post
NOTES
1. LEVELS & DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. STEELWORK:
● All steelwork to BS5950.
● All steelwork to be grade S355.
4. FABRICATION:
● Fabrication drawings to be prepared by the fabricator.
●All fabricated structural steelwork structures executed to
conform to BS EN 1090-2.
●Size & fitment of gate components to suit fabrication
tolerances and checked for fit prior to deliver to site.
●All SHS to SHS & SHS to RHS welds to be full continuous
butt welds to suit thickness of member size.
●All plate to section welds full continuous 6FW or
stitch-welded as indicated (e.g. 50 -150: 50weld, 100miss).
5. PAINT SYSTEM:
Either:
● Steelwork to be hot-dipped galvanised:
● Steelwork to be prepared in accordance with the the
Galvanizer's Association Best Practice Guide for Venting
and Draining.
Or:
● Roller applied paint system applied to external areas only.
Applied at the factory / fabrication yard.
● 1no. primer coat of Sigmacover 280 two-part epoxy paint
(grey) or similar to be applied in accordance with
manufacturer's instructions.
● 1no. top semi-gloss coat of Sigmacover 2 two-part epoxy
paint (colour e.g. grey - to be confirmed) or similar to be
applied in accordance with manufacturer's instructions.
● Touch-up application applied on site to cover over excess
sika-flex areas or scratched & / damaged paintwork areas.
Detailed Design
As shown
M.Lakin
P. Kibel
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Managing flow & stage levels in Hoveton Broad.
- Monitor flow levels & flood warnings. Caution the
Broad is both fluvial & tidal. Up to 0.5m fluctuation in
water levels under tidal surges
- Check adequacy of pontoon for environment (draft,
anchorage & mooring) and plant & loading
requirements.
Managing flow velocities through & across
barrier works
- Monitor velocities.
Risk of falls from height
- Check depth of dredging.
-Check adequate edge protection and access
provision.
Lifting
- Check cranage lifting facilities & constraints.
- Check access weight & size restrictions for
cranage on pontoon.
Interface with public & other site operations
- Check adequate warning signs in place.
- Liaise with operators of the Broad.
Services
- Check for services.
Stability of Piling Works
- Carry out inspection of working area
- Check for conflict with trees & overhanging
branche. Carry clearance works in advance of piling
works.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
Refer to Designer's Risk Assessment and pre-construction
phase plan.
C1
C2
CONSTRUCTION
C3
C4
C5
C6
C7
P01 Draft issue for comment 13 / 11 / 19
P04 Piles revised and reconfigured to address GI
findings of very deep strata of peat.
Gates adjusted to suit & gates posts rev to UBP
P02 No issue
P03 No issue
J.Blyth
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Caution - Sharp Edges
- All sharp edges and burrs to be removed.
Caution - Lifting
- Check adequate lifting facilities & constraints.
Check - All fabricated elements are clean and free
from dust, and burrings on completion.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
!
FABRICATION
!
!
13 / 01 /21
010 / 02 Schematic Sectional Elevation - Eel Trap
(1:5)
010 / 03 Elevation - View from Downstream
(1:5)
010 / 04 Elevation - View from Upstream
(1:5)
Downstream Upstream
010 / 01 Plan - Eel Trap
(1:5)
1no. req
Assembled trap weight (exc. screen) = 35kg
390
60
0
900
60
0
310 Max. width of trap
To ensure fit between screen frames
Modified wedge
wire screen unit
-See Drawing 005
Guide rail slot for closing off
trap with a handstop.
Subject to fabrication
detailing to suit.
Otter screen 6Ø
bars @ 85mm
centres vert & horiz
Conical fyke with 8
mm perforations
@ 12mm pitch
(open area 40%)
-See Drawing 011
for dims.
Trap sides formed with stainless steel 316 plate with
2mm perforations @ 3.5mm pitch
(open area 30%). Plate lapped and amply stitch-welded
to inside face of angle; so that EA face is external.
Trap bolted to modified
screen for ease of
replacement and
transportation
Water vole escape routes
formed from 76.2Ø x 1.5mm
thk stainless steel tubing x
50mm long. Spot weld to
perforated end plate. Sharp
edges to be removed.
Water vole escape routes in upstream
trap face. Formed from 76.2Ø x 1.5mm
thk stainless steel tubing x 50mm long,
spot weld to perforated end plate.
Sock to prevent upstream
migration of fish through
fyke. To be funnel shape
75mm to 90mm diameter
and 115mm in length to
accommodate installation.
To be silt net or similar.
Cable tie
around fyke
sock to hold
in place
Additional
reinforcement to
stop fyke net
from sliping
3no. proprietary 316 stainless steel
3'' butt hinges x 2'' x 2mm cont. FW
to trap frame to allow lid opening for
release of fish and eels
(Subject to fabrication detailing)
Conical fyke with 8 mm
perforations @ 12mm pitch
(open area 40%)
Trap sides and dn/s face with 1mm
thk stainless steel plate 2mm
perforations @ 3.5mm pitch open
area 30% on top, bottom and
downstream faces
All sharp edges to
be fully radiused by
grinding or routing
M8 set screw bolts x 30 and nyloc nuts
@ equal centres, typically 125mm,
typically arranged as portrayed.
M8 set screw bolts x 30 and nyloc nuts
@ equal centres, typically 125mm,
typically arranged as portrayed. Drill
holes 10Ø.
59
0
M8 set screw bolts x 30 long
and nyloc nuts @ 125mm equal
typically arranged as portrayed.
Eel trap formed
from stainless
steel 40 x 40 x
4thk EA. Cont
butt weld to
form frame.
54
0
40 x 40 x 4thk EA side wall
stiffeners. Sharp edges
radiused-of. Cont. 4FW to trap
frame. (Not shown on end
elevations for clarity).
External flange
formed from 40 x40
x 4thk EA welded to
trap and bolted to
screen.
60
0
30
0
10mmØ bar bent to form
handles. Symmetrically located.
Offset from ends to suit. Subject
to fabrication detailing.
40
40
Eel trap frame formed from
stainless steel 40 x 40 x 4thk
EA. Cont butt weld to form
frame.
Ø
7
6
Ø
7
6
Eel trap frame formed from
stainless steel 40 x 40 x 4thk
EA. Cont butt weld to form
frame.
External flange formed from
40 x40 x 4thk EA welded to
trap and bolted to screen.
Otter screen bars 6Ø @ 85mm
centres vert & horiz
Upstream trap face with 1.5mm
thk stainless steel plate 8mm
perforations @ 12mm pitch,
40% open area.
5
900
31
0 M
ax. w
id
th
o
f tra
p
To
e
nsu
re
fit b
etw
ee
n scre
en
fra
me
s
50
150
Fyke with cont. FW to trap frame
External flange formed from 40
x40 x 4thk EA welded to trap
and bolted to screen with M8
stainless steel set screw bolts
Eel trap frame formed from
stainless steel 40 x 40 x 4thk
EA. Cont butt weld to form
frame.
10mmØ bar bent to form
handles. Symmetrically located.
Offset from ends to suit. Subject
to fabrication detailing.
22
3no. proprietary 316 stainless steel
hasp and staple locks welded for client
padlock. Subject to fabrication detailing
3no. proprietary 316 stainless steel 3'' butt
hinges x 2'' x 2mm cont. FW to trap frame to
allow lid opening for release of fish and eels
(Subject to fabrication detailing)
Lid formed from stainless steel 316 plate
with 2mm perforations @ 3.5mm pitch
(open area 30%), framed with & reinforced
with ss 316 40 x 4 thk flat bar across lid at
hinge & lock. NB Base strengthened with
40 x 4 thk plate to mirror lid.
P01 Draft issue for EA Fisheries comment 7 / 10 / 20
J.Rana
Detailed Design
As shown
M.Lakin
P. Kibel
P02 Draft issue for EA Fisheries comment 27/11/20
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. STEELWORK:
● All stainless steel to BS5950.
●All fabricated steelwork structures executed to conform to
BS EN 1090-2.
● All other associated steelwork e.g. solid bar 5mm thk
framing in stainless steel 316L, amply welded to wedge wire.
● All welds 4FW cont. unless otherwise stated.
● Fasteners to be M8 X 25 hex head set screw bolts x 25mm
long + Nyloc nuts in stainless steel A2 (304).
P04 Revised issue with minor revisions & further 13 / 01 / 21
details provided. Renamed dwg 010.
P03 No issue
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Caution - Sharp Edges
- All sharp edges and burrs to be removed.
Caution - Lifting
- Check adequate lifting facilities & constraints.
Check - All fabricated elements are clean and free
from dust, and burrings on completion.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
!
FABRICATION
!
!
Ma
x. 3
00
Ø
76
.2
Ø
011 / 02 Sectional Elevation - Eel Fyke
(1:5)
4no. conical fyke with modified screens required (2 per barrier site) using 2mm perforations
011 / 03 Elevation - View from Seaward Side of Eel Fyke
(1:5)
011 / 04 Elevation - View from Broad Side of Eel Fyke
(1:5)
SEAWARD SIDE Hoveton Broad
011 / 01 Plan - Eel Fyke Bolted to Screen (plate not shown in plan for clarity)
(1:5)
4no. conical fyke with modified screens required (2 per barrier site -Foxborrow & The Dam) using 2mm perforations
Fyke Weight = 10 kg (exc. screen)
50035
39
0
30
0Ø
39
0 S
ta
nd
ard
scre
en
w
id
th
34
5
390
Ø
3
0
0
75
Ø
Ø75
75
- 9
0Ø
Modified wedge wire screen unit.
Frame formed from 60 x 5mm thick
stainless steel flat bar.
-See Drawing 005 for standard
screen.
Guide rail slot for closing off
fyke with a handstop
Otter screen bars @ 85mm centres
vert & horiz
1mm thick stainless steel conical fyke
with 2mm perforations @ 3.5mm pitch
(open area 30%)
2mm thick conical fyke with 2mm
perforations @ 3.5mm pitch
External 6Ø reinforcement ribs
Fyke bolted to modified screen for ease
of replacement and transportation
Otter screen bars @ 85mm centres
vert & horiz
Solid flat plate to stiffen screen cont
FW weld to end of perforated cone.
Sock to prevent upstream migration
of fish through fyke. To be funnel
shape 75mm to 90mm diameter and
115mm in length to accommodate
installation. To be silt net or similar.
Fyke sock
Cable tie around fyke
sock to hold in place
Additional reinforcement to stop
fyke net from sliping
Ø
3
0
0
463
6Ø bar hoops spot amply spot-welded
to perforated plate cone. Nom. radii R =
125, 170, 215, 260 or similar for nominal
100mm equal spacing of reinforcing ribs
stainless steel 40 x 40 x 4thk EA
frame to end of fyke cone
Solid flat plate to stiffen screen cont
FW weld to end of perforated cone.
External 6Ø reinforcement ribs
76.2Ø x 1.5mm thk stainless steel
tubing x 50mm long. Spot weld to
perforated end plate.
76.2Ø x 1.5mm thk stainless steel tubing
x 50mm long. Sharp edges ground off.
Spot weld to perforated end plate.
011 / 06 Plan - Conical Fyke (screen not shown)
(1:5)
4no. conical fyke with modified screens required (2 per barrier site -Foxborrow & The Dam) using 2mm perforations
30
0Ø
75
Ø
Fyke sock
22
011 / 05 Plan - Eel Fyke Screen Template
(1:10)
Fyke Screen:
1mm thick stainless steel grade 316 plate with 2mm
perforations @ 3.5mm pitch
(open area 30%). Plate rolled and fixed along seam with
full butt weld to form cone.
Eel Trap Fyke:
1mm thick stainless steel grade 316 plate with 8 mm
perforations @ 12mm pitch (open area 40%). Plate rolled
and fixed along seam with full butt weld to form cone.
-See Drawing 011
173
R 649
8
3
.
2
1
°
Fabricator to form template to check fit first before
pattern cutting & rolling perforated steel plate.
P01 Draft issue for EA Fisheries comment 7 / 10 / 20
J.Rana
Outline
As shown
M.Lakin
P. Kibel
P02 Draft issue for EA Fisheries comment 27/11/20
1. DIMENSIONS:
● Are in millimetres unless otherwise stated.
● Marked thus (*) or c. are approximate.
● All levels are in metres to Site Datum.
2. SPECIFICATION:
All works to be carried out in accordance with the Civil
Engineering Specification for the Water Industry (CESWI).
All technical requirements clauses apply unless stated as
deleted, amended or augmented in accordance with the
Contract Works Information documentation.
3. STEELWORK:
● All stainless steel to BS5950.
●All fabricated steelwork structures executed to conform to
BS EN 1090-2.
● All steelwork in stainless steel 316L.
● Refer to Drawing 005 for screen details.
● All welds FW cont. unless otherwise stated. Weld size not
to exceed substrate thickness unless otheriwse required.
● Fasteners to be M8 X 25 hex head set screw bolts x 25mm
long + Nyloc nuts in stainless steel A2 (304).
P04 Revised issue with minor revisions 13 / 01 / 21
P03 No issue
SAFETY HEALTH
& ENVIRONMENTAL
INFORMATION
Caution - Sharp Edges
- All sharp edges and burrs to be removed.
Caution - Lifting
- Check adequate lifting facilities & constraints.
Check - All fabricated elements are clean and free
from dust, and burrings on completion.
It is assumed that all works will be carried out by a
competent contractor working, where appropriate, to an
approved method statement
!
FABRICATION
!
!
