BS4449 is yet another deformed steel bar standard. It is also differentiated as per European standards. When it comes to manufacturing, the steel bars falling in this standard are also hot rolled, which means that they are also used for general purposes, i.e. in common construction projects.
PRODUCTS INTRODUCTION
SOFTWARE
BS 4449:97 British Rebar Specifications
Rated Diameter
Nominal Cross Section Area
Weight
EN To The Ribs (mm)
Longitudinal Ribs (mm)
Pitch / Step mm
Ribs Tip Distance mm
Kg / m
Tolerance %
Height
Width
Height
Width
mm
m㎡
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
min.
max.
6
28.3
0.222
± 9
0.3
0.6
0.48
0.72
0.3
0.84
0.48
1.2
3,.0
4.8
1.5
2.3
8
50.3
0.395
± 6.5
0.4
0.8
0.64
0.96
0.4
0.84
0.64
1.6
4.0
6.4
2.0
3.1
10
78.5
0.616
0.5
1.0
0.8
1.2
0.5
0.84
0.8
2.0
5.0
8.0
2.5
3.9
12
113.1
0.888
± 4.5
0.6
1.2
0.96
1.44
0.6
0.84
0.96
2.4
6.0
9.6
3.0
4.7
16
201.1
1.579
0.8
1.6
1.28
1.92
0.8
0.84
1.28
3.2
8.0
12.8
4.0
6.2
20
314.2
2.466
1.0
2.0
1.6
2.4
1.0
0.84
1.6
4.0
10.0
16.0
5.0
7.8
25
490.9
3.854
1.25
2.5
2.0
3.0
1.25
0.84
2.0
5.0
12.5
20.0
6.2
9.8
32
804.2
6.313
1.60
3.2
2.56
3.84
1.60
0.84
2.56
6.4
16.0
25.6
8.0
12.5
40
1256.6
9.864
2.0
4.0
3.2
4.8
2.0
0.84
3.2
8.0
20.0
32.0
10.0
15.7
50
1963.5
15.413
2.5
5.0
4.0
6.0
2.5
0.84
4.0
10.0
25.0
40.0
12.5
19.6
BS 4449:97 Steel Rebar Mechanical Properties
Quality
Akma N / mm2<
Akma / Pull Rate N/mm2
Elongation Elasticity
Total max. % AGT
min.
min.
min.
min.
GR 250
250
Akma x 1.15
22
–
GR 460 A
460
Akma x 1.05
12
2.5
GR 460 B
460
Akma x 1.08
14
5
BS 4449:97 Steel Rebar Chemical Properties
Element
GR 250 % max.
GR 460 A / B % max.
Ribs and Marking Method
Casting
Product
Casting
Product
C
0.25
0.27
0.25
0.27
P
0.060
0.065
0.050
0.055
S
0.060
0.065
0.050
0.055
N
0.012
0.013
0.012
0.013
CE
0.42
0.45
0.51
0.54
Mn Cr+Mo+V Ni+Cu
CE = C + ————- + ——————- + —————–
6 5 15
Scope of Application
Widely used in houses, bridges, roads, especially railways and other civil engineering.