Welded Mesh
Contents
About NatSteel
About Welded Mesh
Advantages of Welded Mesh
Specifications of Welded Mesh
Fabric Lapping and Detailing
Applications
ABOUT
NATSTEEL
NatSteel Holdings – a leading Pan-Asian
company that delivers premium steel
products and solutions for the
construction industry
NatSteel traces its lineage to 1961, when it
was incorporated as National Iron and Steel
Mills. A pioneer and key partner in Singapore’s
nation building efforts, our products are used
in most construction projects island-wide,
from the iconic Changi International Airport
to the public housing that is the trademark of
Singapore’s landscape.
Singapore is home to NatSteel’s headquarters,
as well as its flagship plant, which boasts
one of the largest single downstream rebar
fabrication operations in the world. The
Singapore plant is the only local steel mill
with an integrated upstream and downstream
operation, where steel is manufactured
through recycling scrap, and fabricated
according to customers’ needs. With
operations spanning across the region, the
group has an annual steel production capacity
of over 2 million tonnes.
NatSteel today continues to build on its
success as a leading steel producer in Asia
Pacific, with over 3,000 employees across the
region. Tata Steel is among the top global steel
companies with an annual crude steel capacity
of over 28 million tonnes with major foot
prints in India, the UK, Netherlands, Thailand,
China and Australia. As part of the Tata Steel
group, NatSteel is poised for further growth,
with its sights set on becoming the global steel
industry benchmark for value creation and
corporate citizenship.
1
about
WELDED Mesh
NatSteel’s highly integrated and computerised
manufacturing machines produce welded
mesh widely used in building and civil
engineering projects. Our welded mesh is one
of the prefabrication solutions aimed at helping
customers raise productivity standards in
construction. We do this by working closely with
customers to deliver solutions that are customised
to the project blueprint, redefining concepts of
time, inventory and manpower management and
material wastage reduction.
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3
Advantages of Welded Mesh
Standard Metric Fabric
• Flexibility and controlled manufacturing to suit any structural
requirement either in flat sheet or shaped form
• High and consistent quality welded mesh delivered just-in-time to site
• Improved site productivity with reduced reliance on manpower on-site
• Material wastage is controlled and reduced
• Reduced cost due to enhanced speed of construction
• Better utilisation of on-site space and logistics
• Welded mesh conforms to SS 18:1999, SS 32:1999, BS 4482:1985, BS
4483:1998 or AS/NZS 4671:2001
SS: 32
BS 4483
or NEF500
Ref. no.
Wire spacing
Wire diameter
Cross-sectional area
(mm)
(mm)
(mm2/m)
Main
Cross
Main
Cross
Main
Cross
Nominal mass
(kg/m2)
SQUARE FABRIC: A-SERIES
A13
-
200
200
13
13
664
664
10.42
A12
-
200
200
12
12
566
566
8.88
A11
-
200
200
11
11
475
475
7.46
A10
A 393
200
200
10
10
393
393
6.16
A9
-
200
200
9
9
318
318
4.99
A8
A 252
200
200
8
8
252
252
3.95
A7
A 193
200
200
7
7
193
193
3.02
A6
A 142
200
200
6
6
142
142
2.22
*A5
A 98
200
200
5
5
98
98
1.54
SQUARE FABRIC: D-SERIES
Standards
Yield strength (N/mm2)(MPa)
Weld shear load (N)
SS 18:1999
500
NA
Cold-reduced steel wire for the reinforcement of concrete and the
manufacture of welded fabric
500
Steel fabric for the reinforcement of concrete
BS 4482:1985
250 x area of the larger wire (for plain wires)
150 x area of the larger wire (for ribbed wires)
460
NA
460
115 x area of the smaller wires
500
250 x area of the larger wires
Cold-reduced steel wire for the reinforcement of concrete
BS 4483:1998
Steel fabric for the reinforcement of concrete
AS/NZS 4671:2001
Steel reinforcing materials
-
100
100
13
13
1327
1327
20.84
D12
-
100
100
12
12
1131
1131
17.76
D11
-
100
100
11
11
950
950
14.92
D10
-
100
100
10
10
785
785
12.32
D9
-
100
100
9
9
636
636
9.98
D8
-
100
100
8
8
503
503
7.90
D7
-
100
100
7
7
385
385
6.04
D6
-
100
100
6
6
283
283
4.44
*D5
-
100
100
5
5
196
196
3.08
RECTANGULAR FABRIC: B-SERIES
Standards
SS 32:1999
D13
B13
-
100
200
13
10
1327
393
13.50
B12
B 1131
100
200
12
8
1131
252
10.90
B11
-
100
200
11
8
950
252
9.43
B10
B 785
100
200
10
8
785
252
8.14
B9
-
100
200
9
8
636
252
6.97
B8A
-
150
200
8
7
335
193
4.14
B8
B 503
100
200
8
8
503
252
5.93
B7
B 385
100
200
7
7
385
193
4.53
B6
B 283
100
200
6
7
283
193
3.73
*B5
B 195
100
200
5
7
196
193
3.05
SQUARE FABRIC: E-SERIES
E13
-
150
150
13
13
885
885
13.89
E12
-
150
150
12
12
754
754
11.84
E11
-
150
150
11
11
633
633
9.95
E10
-
150
150
10
10
523
523
8.23
E9
-
150
150
9
9
424
424
6.67
E8
-
150
150
8
8
335
335
5.27
E7
-
150
150
7
7
257
257
4.03
E6
-
150
150
6
6
189
189
2.96
* Reference No. A5, B5 and D5 are available in Standard Sheet of 6.0m x 2.4m only.
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5
Detailing
Substitution of NatSteel Fabric for High Tensile Bars
75
1047
993
D12 B12 (1311)
100
786
745
D10 B10 (785)
125
628
596
D9 B9 (636)
150
524
497
D8 B8 (503)
175
449
426
D8 B8 (503)
200
393
373
D7 B7A B7 (385)
A10 (393)
250
314
298
A9 (318)
B8A (335)
300
262
248
A8 (252)
D6 B6 (283)
100
1327
1259
D13 B13 (1328)
125
1062
1007
D12 B12 (1131)
150
885
839
D11 B11 (950)
175
759
719
D10 B10 (785)
200
664
630
D9 B9 (636)
250
531
504
D8 B8 (503)
300
442
420
D8 B8 (503)
150
1341
1271
D13 B13 (1328)
175
1149
1090
D12 B12 (1131)
200
1005
954
D11 B11 (950)
250
804
763
D10 B10 (785)
300
670
636
D9 B9 (636)
Recommended NatSteel Fabric (mm /m)
Plain welded steel fabric bonds to concrete by the positive mechanical
anchorage at each intersection. Deformed (ribbed) welded steel
fabric achieves bonding and anchorage with its ribbed surface and
welded intersections.
Top fabric
Top fabric
Top fabric
Top fabric
Bottom fabric
Bottom welded steel fabric in slab
Top welded steel fabric in slab
Standard anchorage details
According to the SS: 32 standard, the minimum weld shear stress
requirement for plain welded steel fabric is 250MPa. Based on
this requirement, a lap splice with two overlapping and welded
intersections is sufficient to deliver full yield strength.
200
Fabric lap
Top fabric
200
16
Equivalent Area (mm /m)
Anchorage detail
Location
At end support
Anchorage length (A)
At intermediate support
One-way
A
Types of fabric lap
Main wire
Full yield strength layered lap
• Commonly used for plain welded mesh
• Staggered arrangement to avoid accumulation of laps
A
A
A
A
Two-way
A
A
200
13
Area (mm /m)
2
200
10
Spacing (mm)
2
200
Diameter (mm)
Consultants can specify the length of mesh that penetrates into beams
Substitution of NatSteel Fabric for High Tensile Bars
2
200
Bars
A = 100mm (min.)
A = 100mm (min.)
For wire < 10mm
For wire < 10mm
A = 150mm (min.)
A = 150mm (min.)
For wire ≥ 10mm
For wire ≥ 10mm
A
& for twin wires
A
A
Half yield strength layered lap
• May be used for side laps across beams
A = 100mm (min.)
A
A
Cross wire
6
200
A
200
A
Flying ends lap
• A form of in-plane lapping where one sheet has a lap length
overhang without welded intersections
& for twin wires
A = 50mm (min.)
For all cross wire diameter
unless otherwise stated
A
A
A
A
A
A
For wire < 10mm
A = 150mm (min.)
For wire ≥ 10mm
& for twin wires
7
Applications
Wall Mesh
Slab Mesh
Designer Mesh
Precage wall
Precage column
D
Precage beam
GROUN
Slab mesh
Beam stirrup cage
Column link cage
Diaphragm Wall
Cage
NT
SEME
Couplers in DWall
for future extension
of slab
BA
Drain mesh
Cut & Bend Rebar
Pile cap - Mesh
Precage Bored Pile
Reinforcement
Drain Mesh
Types of welded mesh in a building
Lift lobby RC Wall
b a
Precast Staircase
X
a b
X
Y
2 layer of A8
X
W
X
Precast u-drain
A’
Plan view of a lift lobby
• 2 layers of AB
• Open end links cage for wall end
• Lap = 2 x weld spacing (sm)
8
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Pile Cap Mesh
Precage Column & Column Link Cage
Applications
Main vertical
reinforcing bars
Pilecap mesh for driven pile and bored pile
For pilecap with heavier reinforcements, such
as 28mm diameter, pilecap mesh are used in
combination with heavy reinforcement bars.
Pilecap Mesh
PS1751320D
Step 3
PD100840D
Step 4
Column width
Step 1
Carrier wire
Concrete cover to link
Step 2
100 (Typical)
Column links
C-Link
Stay Wires
Column length
Cross-section of column links (without main
reinforcement bars). This illustrates the details of a
rectangular-shaped column steel cage before the
main reinforcing bars have been inserted into the
sides/ corners of the closed loop of the links.
Placing sequence of pilecap mesh for pilecap
Sequence of Assembly
Column link cages can be customised to fit any
column of regular dimensions.
Product notation for column link cages
‘L’ for closed link
Material code* (‘R’ or ‘D’)
Link diameter
Link spacing
L
R
10
100
*R refers to plain mild steel bar; D refers to cold-reduced ribbed wire
Slab
Beam
1. Pilecap reinforcement using pilecap mesh
2. Pilecap placed in position
Typical Prefabricated Column
1. Pilecap mesh together with heavy reinforcement
bar forming the heavy reinforced pilecap
10
3. Prefabricated stump in position before
concreting of pilecap
11
Beam Stirrup Cage
Product Tag
SC
1/1
STIRRUP
CAGE
CAPPING
BC - Bottom Cover
SC - Side Cover
TC - Top Cover
BC
SC
SC
A typical stirrup cage with two parts – beam stirrup
cage and beam capping
Beam width
Product code
Mesh dimension and quantity
SR 10250
1370x1000x1
325/326
Beam stirrup cages consist of a series of bent, double-legged stirrups welded together with carrier wires.
Customer & project
Block/zone and element
Bar bending schedule reference
125/126
M: 10,250,4
1250R
C: 6,300,3
100DH
AB CONST J WEST
BLK 12 STY:8 PT:B
HOWM57892M
Hook
Graphical representation of reinforcement
with dimensions and shape code
C
100
MWM5521
Hook
Leg
A
B
C
Multiple stirrup cages
Stirrup cage and capping cage for beam
A:415
LEG:110
Multiple stirrup cages used as reinforcement for
wide beam
B:200
HOOK:60
C:415
Product notation for beam stirrup cages
‘S’ for open stirrup
Material code*
(‘R’ or ‘D’)
S
R
Diameter of stirrup
Stirrup spacing
10
250
SLOPE:0
‘d’ for double stirrups
(to be omitted for single stirrups)
Product marking
T41-2
d
42
*R refers to plain mild steel bar; D refers to cold-reduced ribbed wire
29/11/2012
27/11/12-F
7317
*121123009M122918181*
Beam depth
TC
SC
510
Last 6 digits of Sales Order Number
Prefabricated Beam
3200
T16
100
1730
250 515 250
615
R6@250
T13
2200
Engineering mesh with variable spacings
and diameters
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herein. NatSteel Holdings Pte Ltd is not responsible for any errors, omissions, or inaccuracies contained in any information provided by such third
parties. While efforts have been made to ensure the accuracy of the information set out herein, there may be inadvertent technical or factual
inaccuracies and typographcal errors. NatSteel Holdings Pte Ltd reserves the right to make changes and corrections at any time, without notice.
NatSteel Holdings Pte Ltd does not accept any liability or responsibility for the accuracy, completeness or timeliness of the information contained
herein. Neither NatSteel Holdings Pte Ltd nor any of it’s employees, agents or officers shall be held liable for any improperor incorrect use of the
informationdescribed and/or contained herein and assumes no resposibilty for anyone’s use of the information. In no event shall NatSteel Holdings
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damages) howsoever caused whether arising in contract, tort or otherwise, which may arise as a result of your use of or reliance on any contect or
information contained herein.
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