Welded Mesh

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.

ABOUTNATSTEELNatSteel Holdings – a leading Pan-Asian company that delivers premium steel products and solutions for theconstruction industry

Contents

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About NatSteelAbout Welded MeshAdvantages of Welded MeshSpecifications of Welded MeshFabric Lapping and DetailingApplications

ABOUTWELDED MEShNatSteel’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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Standard Metric Fabric

SS: 32

or NEF500

BS 4483

Ref. no.

Wire spacing

(mm)

Wire diameter

(mm)

Cross-sectional area

(mm2/m) Nominal mass

(kg/m2)Main Cross Main Cross Main Cross

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

D13 - 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

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

StandardsStandards Yield strength (N/mm2)(MPa) Weld shear load (N)

SS 18:1999

Cold-reduced steel wire for the reinforcement of concrete and the

manufacture of welded fabric

500 NA

SS 32:1999

Steel fabric for the reinforcement of concrete

500 250 x area of the larger wire (for plain wires)

150 x area of the larger wire (for ribbed wires)

BS 4482:1985

Cold-reduced steel wire for the reinforcement of concrete

460 NA

BS 4483:1998

Steel fabric for the reinforcement of concrete

460 115 x area of the smaller wires

AS/NZS 4671:2001

Steel reinforcing materials

500 250 x area of the larger wires

• 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

Advantages of Welded Mesh

* Reference No. A5, B5 and D5 are available in Standard Sheet of 6.0m x 2.4m only.

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Bottom fabric Top fabric

Top fabric

Top fabric

Top

fabr

ic

Top

fabr

ic

Standard anchorage detailsAnchorage detail Anchorage length (A)

Location At end support At intermediate support One-way Two-way

Main wire

A = 100mm (min.)

For wire < 10mm

A = 150mm (min.)

For wire ≥ 10mm

& for twin wires

A = 100mm (min.)

For wire < 10mm

A = 150mm (min.)

For wire ≥ 10mm

& for twin wires

Cross wire

A = 50mm (min.)

For all cross wire diameter

unless otherwise stated

A = 100mm (min.)

For wire < 10mm

A = 150mm (min.)

For wire ≥ 10mm

& for twin wires

Types of fabric lap

Full yield strength layered lap• Commonly used for plain welded mesh• Staggered arrangement to avoid accumulation of laps

Half yield strength layered lap• May be used for side laps across beams

Flying ends lap• A form of in-plane lapping where one sheet has a lap length

overhang without welded intersections

DetailingConsultants can specify the length of mesh that penetrates into beams

Bottom welded steel fabric in slab Top welded steel fabric in slab

200

A

A A

200

A

A A

200

A

A A

200

A

A A

200

A

A A

200

A

A A

200

A

A A

200

A

A A

Substitution of NatSteel Fabric for High Tensile BarsBars Substitution of NatSteel Fabric for High Tensile Bars

Diameter (mm) Spacing (mm) Area (mm2/m) Equivalent Area (mm2/m) Recommended NatSteel Fabric (mm2/m)

10 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)

13 100 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)

16 150 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)

Fabric lapPlain welded steel fabric bonds to concrete by the positive mechanical anchorage at each intersection. Deformed (ribbed) welded steelfabric achieves bonding and anchorage with its ribbed surface and welded intersections.

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.

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AppLicATiONSWall Mesh Slab Mesh

A’

2 layer of A8

Lift lobby RC Wall

Plan view of a lift lobby• 2 layers of AB• Open end links cage for wall end • Lap = 2 x weld spacing (sm)

Precast Staircase

Designer Mesh

Drain Mesh

Precast u-drain

b ba a

WX X

XX

Y

Precage wall

Column link cage

Precage beam

Drain mesh

Precage Bored Pile Reinforcement

Pile cap - Mesh

Precage column

Slab mesh

Diaphragm WallCage

Couplers in DWall for future extension of slab

Beam stirrup cage

Cut & Bend Rebar

BASEMENT

GROUND

Types of welded mesh in a building

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Pile Cap Mesh

1. Pilecap reinforcement using pilecap mesh

Placing sequence of pilecap mesh for pilecap

ApplicationsPilecap mesh for driven pile and bored pileFor pilecap with heavier reinforcements, such as 28mm diameter, pilecap mesh are used in combination with heavy reinforcement bars.

Sequence of Assembly

1. Pilecap mesh together with heavy reinforcement bar forming the heavy reinforced pilecap

2. Pilecap placed in position

3. Prefabricated stump in position before concreting of pilecap

Step 1

Pilecap Mesh

PS1751320D

PD100840DStep 4

Step 2

Step 3

Precage Column & Column Link Cage

Carrier wire

Column length

Conc

rete

cov

er to

link

Colu

mn

wid

th

C-Link

100 (Typical)

Main verticalreinforcing bars

Column links

Typical Prefabricated Column

Stay Wires

Column link cages can be customised to fit any column of regular dimensions.

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.

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

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Beam Stirrup Cage Product Tag

Prefabricated Beam

Multiple stirrup cages

Engineering mesh with variable spacings and diameters

Stirrup cage and capping cage for beam Multiple stirrup cages used as reinforcement for wide beam

Beam stirrup cages consist of a series of bent, double-legged stirrups welded together with carrier wires.

TCBC

SC

SC SC

SCBe

am d

epth

Beam width

STIRRUPCAGE CAPPING

BC - Bottom CoverSC - Side CoverTC - Top Cover

A typical stirrup cage with two parts – beam stirrup cage and beam capping

Product notation for beam stirrup cages‘S’ for open stirrup Material code*

(‘R’ or ‘D’)Diameter of stirrup Stirrup spacing

‘d’ for double stirrups

(to be omitted for single stirrups)

S R 10 250 d

*R refers to plain mild steel bar; D refers to cold-reduced ribbed wire

3200

1730

2200

100

250

515

250

615

R6@250

T16

T13

SR 10250

HOWM57892M

425107317

100MWM5521

29/11/201227/11/12-F

1/1

M: 10,250,41250RAB CONST J WESTBLK 12 STY:8 PT:B

A:415LEG:110

B:200HOOK:60

C:415

A B

Hook

Leg

CHook

C

SLOPE:0T41-2

100DHC: 6,300,3

325/326 125/126

1370x1000x1

*121123009M122918181*

Product code

Mesh dimension and quantity

Customer & project

Block/zone and element

Bar bending schedule reference

Product marking

Last 6 digits of Sales Order Number

Graphical representation of reinforcement with dimensions and shape code

NatSteel Holdings Pte Ltd makes no representation or warranty regarding the accuracy, quality, suitability or reliability of the information contained 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 Pte Ltd or it’s employees, agents or officers be liable for any loss or damage of whatever nature (direct, indirect, special, exemplary or consequential 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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© 2013 NatSteel Holdings Pte Ltd. All rights reserved. No portion of this publication may be produced or copied in any form or by any means without the written permission of NatSteel Holdings Pte Ltd.

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50% RECYCLED CONTENT

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