STANDARD WELDED WIRE MESH FABRIC FOR CONCRETE REINFORCEMENT

SPECIFICATIONS

1) STANDARD MESH FOR CONCRETE REINFORCEMENT
The production of mesh reinforcement complies to BS 4483. Mesh is produced from cold reduced deformed steel wires according to BS 4482.

a) Mechanical Properties
  • Specified characteristic strength: 460 N/mm
  • Tensile Strength: min 510 N/mm. In addition either the tensile strength recorded in the tensile test shall be at least 5% greater than the recorded yield strength or alternatively the minimum elongation shall be not less than 12% measured on a gauge length of 5do.
  • Shear strength of the weld: The shearing load required to produce failure of a welded intersection shall be not less than 0.25 A fy, where A is the nominal cross-sectional area of the smaller wire at the welded intersection and fy is the characteristic yield stress of the wire (460 N/mm).

b) Chemical composition of steel

Carbon C: max 0.25%
Sulphur S: max 0.060%
Phosphorous P: max 0.060%
Carbon Equivalent Value Ceq: max 0.42%
Where Ceq = C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15

TABLE I  -  STANDARD MESH FABRIC FOR CONCRETE REINFORCEMENT

No.

Types Wire Spacing Wire Diameter Sheet
Dimensions/m
Weight per
sheet kg/pc
Main mm Cross mm Main mm Cross mm
1 A98 200 200 5 5 2.15 X 5.00 16.7
2 A142 200 200 6 6 24.1
3 A193 200 200 7 7 32.8
4 A252 200 200 8 8 43.0
5 A393 200 200 10 10 67.1
6 B503 100 200 8 8 64.7
7 B785 100 200 10 8 89.1
8 A98* 200 200 5 5 1.80 X 3.00 8.3
9 A142* 200 200 6 6 12.0
10 A252* 200 200 8 8 1.75 X 3.00 21.0
11 A393* 200 200 10 10 32.9
12 Q92 150 150 4.2 4.2 2.15 X 5.00 15.9
13 Q131 150 150 5 5 22.5
14 Q188 150 150 6 6 32.4
15 Q257 150 150 7/5() 7 39.7
16 R92 150 250 4.2 4.2 12.8
STEEL

Cold reduced, high tensile, deformed, according to BS 4482

Note 7/5(): Mesh Type Q257 is produced with cross wires Y7/150mm. Longitudinal wires in the middle section of the sheet are again Y7/150mm, while in the marginal areas, on either side, the longitudinal wires are Y5/150mm (3 No Y5mm on each side). This is saving weight at the side overlapping areas.

*continued

No.

Types Weight per mkg/m

Sectional Area

Overhangs

Main mm/m

Cross mm/m Main mm Cross mm
1 A98 1.54 98 98 100 / 100 75 / 75
2 A142 2.22 142 142
3 A193 3.02 193 193
4 A252 3.95 252 252
5 A393 6.16 393 393
6 B503 5.93 503 252 100 / 100 25 / 25
7 B785 8.14 785 252
8 A98* 1.54 98 98 100 / 100 125 / 75
9 A142* 2.22 142 142
10 A252* 3.95 252 252 100 / 100 75 / 75
11 A393* 6.16 393 393
12 Q92 1.48 92 92 100 / 100 25 / 25
13 Q131 2.09 131 131
14 Q188 3.01 188 188
15 Q257 3.69 257 257
16 R92 1.19 92 55 125 / 125 25 / 25
STEEL Cold reduced, high tensile, deformed, according to BS 4482

 

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