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BS4449 Steel Reinforcement Rebar

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BS4449 Steel Reinforcement Rebar
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.
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BS4449 Steel Reinforcement Rebar Description

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. These deformed bars are also available between 12 mm to 30 mm diameter size. And the common lengths that they are available in are 9 m and 12 m. Such bars are widely used in houses, bridges, roads, especially railways and other civil engineering.

 

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 &ndash;
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 BS4449 Steel Reinforcement Rebar
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 + &mdash;&mdash;&mdash;&mdash;- + &mdash;&mdash;&mdash;&mdash;&mdash;&mdash;- + &mdash;&mdash;&mdash;&mdash;&mdash;&ndash;
                      6                       5                        15          

 

Scope of Application

Widely used in houses, bridges, roads, especially railways and other civil engineering.

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