Reinforcing Bar (Re-bar):
A commonly grade steel used to strengthen concrete. Re-Bar = Reinforcing Bar. Rebar is an important component of reinforced concrete and reinforces masonry structures. It is usually formed from carbon steel and is given ridges for better frictional adhesion to the concrete.
Table -01 Equivalent US customary and Metric Grades for Deformed Bar
Grade
(US Customary)
|
Minimum Yield Strength (KSI)
|
Grade
(Metric)
|
Specific Characteristic Strength (MPa)
|
40
|
40
|
300
|
300
|
50
|
50
|
350
|
350
|
60
|
60
|
420
|
420
|
75
|
75
|
520
|
520
|
Table -02 Summary of minimum ASTM strength requirements
Products
|
ASTM Specification
|
Designation
|
Min yield strength psi (MPa)
|
Min tensile strength Psi (MPa)
|
Reinforcing Bar
|
A615
|
Grade 40
|
40,000 (280)
|
60,000 (420)
|
Grade 60
|
60,000 (420)
|
90,000 (620)
|
||
Grade 75
|
75,000 (520)
|
1,00,000 (690)
|
||
A706
|
Grade 60
|
60,000 (420)
|
80,000 (550)
|
|
A996
|
Grade 40
|
40,000 (280)
|
60,000 (420)
|
|
Grade 50
|
50,000 (350)
|
80,000(550)
|
||
Grade 60
|
60,000 (420)
|
90,000 (620)
|
||
Deformed Bar Mats
|
A184
|
Same as reinforcing Bar
|
||
Zinc-coated Bar
|
A767
|
Same as reinforcing Bar
|
||
Epoxy- coated Bar
|
A775
|
Same as reinforcing Bar
|
||
A934
|
Same as reinforcing Bar
|
|||
Stainless- Steel Bar
|
A955
|
Same as reinforcing Bar
|
||
Wire- Plain
|
A82
|
70,000(480)
|
80,000(550)
|
|
Wire- Deformed
|
A496
|
75,000(515)
|
85,000 (585)
|
|
Welded wire Reinforcement Plain
|
A185
|
65000 (450)
|
75000 (515)
|
|
Prestressing tendons – (Seven wire strand)
|
A416
|
Grade 250
|
2,12,500- stress relieved
|
250,000 (1725)
|
Grade 270
|
2,43,000- Low relaxation
|
270,000 (1860)
|
||
Bars
|
A 722
|
Type I (Plain)
|
127,500 (800)
|
150,000 (1035)
|
Type II (Deformed)
|
120,000 (825)
|
150,000 (1035)
|
||
 |
| Plain Bar |
 |
| Deformed Bar |
Table -03 Designation, area, Perimeters, and weights of Standard bars
Bar no
|
Diameter, in
|
Diameter, mm
|
Cross-sectional Area, in2
|
Perimeter, in
|
Unit weight per foot, lb
|
#2
|
2/8=1/4=.250
|
6mm
|
.05
|
.79
|
.167
|
#3
|
3/8=.375
|
10mm
|
.11
|
1.18
|
.376
|
#4
|
4/8=1/2=.50
|
13mm
|
.20
|
1.57
|
.668
|
#5
|
5/8=.625
|
16mm
|
.31
|
1.96
|
1.043
|
#6
|
6/8=3/4=.750
|
20mm
|
.44
|
2.36
|
1.502
|
#7
|
7/8=.875
|
22mm
|
.60
|
2.75
|
2.044
|
#8
|
8/8=1
|
25mm
|
.79
|
3.14
|
2.670
|
#9
|
9/8=1.128
|
29mm
|
1.00
|
3.54
|
3.400
|
#10
|
10/8=5/4=1.270
|
32mm
|
1.27
|
3.99
|
4.303
|
#11
|
11/8=1.410
|
36mm
|
1.56
|
4.43
|
5.313
|
14s
|
14/8=1.693
|
43mm
|
2.25
|
5.32
|
7.650
|
18s
|
18/8=2.257
|
57mm
|
4.00
|
7.09
|
13.600
|
Source: Engineering Materials; Dr. Enamur Rahim Latifee
Reinforcing Bar (Rebar)
Reviewed by Sabbir Karim
on
12:13 AM
Rating:
Reviewed by Sabbir Karim
on
12:13 AM
Rating:
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