Section Properties of Reinforcing Bars & Cement Types
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Introduction
General properties of reinforcing bars used in concrete design as well as the main types of portland cement are given in this article.
Concepts and Formulas
Section properties of reinforcing bars
Bar |
Nominal diameter |
Cross Section |
Perimeter |
Normal weight |
||||
No. |
in |
mm |
in |
mm |
in |
mm |
in |
mm |
3 |
0.375 |
9.52 |
0.11 |
71 |
1.178 |
29.9 |
0.376 |
0.56 |
4 |
0.5 |
12.7 |
0.2 |
129 |
1.571 |
39.9 |
0.668 |
0.994 |
5 |
0.625 |
15.88 |
0.31 |
200 |
1.963 |
49.9 |
1.043 |
1.552 |
6 |
0.75 |
19.05 |
0.44 |
284 |
2.356 |
59.8 |
1.502 |
2.235 |
7 |
0.875 |
22.22 |
0.6 |
387 |
2.749 |
69.8 |
2.044 |
3.042 |
8 |
1.000 |
25.4 |
0.79 |
510 |
3.142 |
79.8 |
2.67 |
3.973 |
9 |
1.128 |
28.65 |
1.00 |
645 |
3.544 |
90.0 |
3.4 |
5.06 |
10 |
1.27 |
32.26 |
1.27 |
819 |
3.990 |
101.4 |
4.303 |
6.404 |
11 |
1.541 |
35.81 |
1.56 |
1006 |
4.43 |
112.5 |
5.313 |
7.907 |
14 |
1.693 |
43.00 |
2.25 |
1452 |
5.32 |
135.1 |
7.65 |
11.38 |
18 |
2.257 |
57.33 |
4.00 |
2581 |
7.09 |
180.1 |
13.6 |
20.24 |
Main types of portland cement
Type |
Name |
Description |
I |
Normal |
General purpose (most buildings, bridges, pavements, precast units, etc) |
II |
Moderate |
Moderate sulfate and heat resistance |
III |
High early strength |
Fast strength development, cold weather concreting |
IV |
Low-heat |
Generate low-heat during hydration (Massive structures such as dams.) |
V |
Sulfate-resisting |
High sulfate resistance |
White | White color | Decorative (otherwise has properties similar to Type I) |

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Read also
- Solution of Maximum Uniformly Distributed Service Live Load That A Beam Can Support Based on Its Flexural Strength
- Structure and composition of conventional portland concrete
- How far apart should dowels be?
- Where are dowel bars provided?
- What is the purpose of dowel bars?
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