Civil Engineering Reference
In-Depth Information
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T ABLE 3.8
Standard-Size Reinforcing Bars According to ASTM A615
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Nominal Dimensions
Deformation Requirements (mm)
Bar
Nominal
Maximum
Minimum
Designation
Mass
Diameter
Cross-Sectional
Perimeter
Average
Average
Maximum
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mm
2
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Number
(kg/m)
(mm)
Area
1
2
(mm)
Spacing
Height
Gap
10 [3]
0.560
9.5
71
29.9
6.7
0.38
3.6
13 [4]
0.994
12.7
129
39.9
8.9
0.51
4.9
16 [5]
1.552
15.9
199
49.9
11.1
0.71
6.1
19 [6]
2.235
19.1
284
59.8
13.3
0.97
7.3
22 [7]
3.042
22.2
387
69.8
15.5
1.12
8.5
25 [8]
3.973
25.4
510
79.8
17.8
1.27
9.7
29 [9]
5.059
28.7
645
90.0
20.1
1.42
10.9
32 [10]
6.404
32.3
819
101.3
22.6
1.63
12.4
36 [11]
7.907
35.8
1006
112.5
25.1
1.80
13.7
43 [14]
11.38
43.0
1452
135.1
30.1
2.16
16.5
57 [18]
20.24
57.3
2581
180.1
40.1
2.59
21.9
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Copyright ASTM, Printed with Permission.
Bar numbers approximate the number of millimeters of the nominal diameter of the bars. [Bar numbers are based on the number of eighths of an inch
of the nominal diameter of the bars.]
The nominal dimensions of a deformed bar are equivalent to those of a plain round bar having the same weight per meter as the deformed bar.
Requirements for protrusions on the surface of the bar.
Chord 12.5% of Nominal Perimeter
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