Rebar Sizes report
Rebar is one of the most necessary building materials in the 21st century. It is widely used in various building structures, especially large, heavy, light thin-walled, high-rise buildings. Its cross-section is round, sometimes square, with rounded corners. The nominal diameter of the rebars is 8-50 mm, and the recommended diameters are 8, 12, 16, 20, 25, 32, and 40 mm.
Rebars and steel reinforcing bars are commonly used as grids for pouring concrete. There are many different sizes and types of rebars and have different properties. Whenever you start a project, you should consider the appropriate rebar size. One of the main methods of specifying the size of the rebar is "grade," which represents the weight that the rebar is designed to bear.
The appropriate rebar size should also be selected according to the thickness of the steel, which is usually expressed in imperial and metric systems. The imperial size mark indicates that the thickness of the steel bar is 1/8 inch. The following article introduces more information about rebar sizes you should know.
Rebar Size Guide
The steel reinforcing bars, or rebars, are used to reinforce concrete in building work. It can be a complicated area of construction to navigate if you are unfamiliar with it. Rebar sizes vary greatly, and choosing the right ones requires a certain amount of knowledge and skill. Global standards govern the physical, mechanical, and chemical properties of rebar, and it has ensured safety and consistency in construction projects across the world.
Ever wonder what the size number for rebar represents? It is quite easy. The number represents a unit of 1/8 of an inch, which means a #4 rebar is 4 times 1/8", #5 bar is 5/8", #6 bar is 3/4", and so on. As we know, standard rebar sizes can vary by country. Metric size and imperial size are two widespread measurements. There are several quick rebar size comparison tables for reference, and the parameters include length and diameter, etc.
U.S. rebar size chart
Imperial bar sizes give the diameter in units of 1/8 inch, so that #8 = 1 inch diameter.
| Imperial Bar Size | Weight per unit length (lb/ft) | "Soft" Metric Size | Mass per unit length | Nominal Diameter | Nominal Area | |||
|---|---|---|---|---|---|---|---|---|
| (lb/ft) | (kg/m) | (inch) | (mm) | (inch2) | (mm2) | |||
| #2 | 0.258 | #6 | 0.167 | 0.249 | 0.250 | 6.35 | 0.05 | 32 |
| #3 | 0.376 | #10 | 0.376 | 0.561 | 0.375 | 9.525 | 0.11 | 71 |
| #4 | 0.688 | #13 | 0.668 | 0.996 | 0.500 | 12.7 | 0.20 | 129 |
| #5 | 1.043 | #16 | 1.043 | 1.556 | 0.625 | 15.875 | 0.31 | 200 |
| #6 | 1.502 | #19 | 1.502 | 2.24 | 0.750 | 19.05 | 0.44 | 284 |
| #7 | 2.044 | #22 | 2.044 | 3.049 | 0.875 | 22.225 | 0.60 | 387 |
| #8 | 2.670 | #25 | 2.670 | 3.982 | 1.000 | 25.4 | 0.79 | 509 |
| #9 | 3.400 | #29 | 3.400 | 5.071 | 1.128 | 28.65 | 1.00 | 645 |
| #10 | 4.303 | #32 | 4.303 | 6.418 | 1.270 | 32.26 | 1.27 | 819 |
| #11 | 5.313 | #36 | 5.313 | 7.924 | 1.410 | 35.81 | 1.56 | 1006 |
| #14 | 7.650 | #43 | 7.650 | 11.41 | 1.693 | 43 | 2.25 | 1452 |
| #18 | 13.600 | #57 | 13.60 | 20.284 | 2.257 | 57.3 | 4.00 | 2581 |
| #18J | - | - | 14.60 | 21.775 | 2.337 | 59.4 | 4.29 | 2678 |
European rebar size chart
| Metric Bar Size | Mass per unit length (kg/m) | Nominal Diameter (mm) | Cross-Sectional Area (mm2) |
|---|---|---|---|
| 6,0 | 0.222 | 6 | 28.3 |
| 8,0 | 0.395 | 8 | 50.3 |
| 10,0 | 0.617 | 10 | 78.5 |
| 12,0 | 0.888 | 12 | 113 |
| 14,0 | 1.21 | 14 | 154 |
| 16,0 | 1.579 | 16 | 201 |
| 20,0 | 2.467 | 20 | 314 |
| 25,0 | 3.855 | 25 | 491 |
| 28,0 | 4.83 | 28 | 616 |
| 32,0 | 6.316 | 32 | 804 |
| 40,0 | 9.868 | 40 | 1257 |
| 50,0 | 15.413 | 50 | 1963 |
Canadian rebar size chart
| Metric Bar Size | Mass per unit length (kg/m) | Nominal Diameter (mm) | Cross-Sectional Area (mm2) |
|---|---|---|---|
| 10M | 0.785 | 11.3 | 100 |
| 15M | 1.570 | 16.0 | 200 |
| 20M | 2.355 | 19.5 | 300 |
| 25M | 3.925 | 25.2 | 500 |
| 30M | 5.495 | 29.9 | 700 |
| 35M | 7.850 | 35.7 | 1000 |
| 45M | 11.775 | 43.7 | 1500 |
| 55M | 19.625 | 56.4 | 2500 |
Rebar Grades
When working with rebar, it is imperative to understand the size of rebar you need and the grade and type of steel. Understanding the difference between yield strength and tensile strength is necessary to evaluate what rebar grade you need. Think of yield strength and tensile strength as the minimum and maximum stress ranges for a particular rebar grade.
- Yield strength is the minimum amount of stress a material can take before it begins to deform permanently.
- Tensile strength measures the maximum amount of pressure a material can take before being permanently damaged and broken.
Rebar grades are set by ASTM. The grade designation is equal to minimal yield strength in kilopounds per square inch (KSI). Grade 33 starts out the low end of strength, increasing as the grade number gets bigger. Common grades are 40, 60, 75, 80, and 100. The nomenclature for the grades represents how much yield the rebar has. For example, grade 40 rebar has a minimum yield strength of 40 KSI, equal to 40,000 PSI, whereas grade 80 rebar has a minimum yield strength of 80 KSI or 80,000 PSI.
Common Types of Rebar
Choosing the suitable rebar for your project will depend on the size and grade. It will also largely depend on the material used to make the rebar, as well as what is used to coat it.
Carbon Steel Rebar
Carbon steel rebar is the most common type of rebar used in residential and commercial projects. This alloy steel is exceptionally cost-effective and durable, but it may not hold up well in high-moisture environments.
Stainless Steel Rebar
Although it is more expensive than a carbon steel rebar, stainless steel bars can be a viable alternative. These steel reinforcing bars are used for bridges, roads, piers, and other weight-supporting structures. Stainless steel rebar can help prevent corrosion and add protection.
Galvanized Rebar
One of the more expensive options, galvanized rebar, is an alloy steel rebar dipped in a zinc solution to add a special water coating that can deter corrosion. This material is an excellent alternative to epoxy-coated rebar. Galvanized rebar is 40 times more resistant to deterioration and holds up better during shipping and installation.
Epoxy Coated Rebar
Epoxy-coated rebar works well in high-humidity and high-moisture construction projects. It can retain the strength and durability of the concrete without accelerated corrosion. But the delicate epoxy coating can be scratched and damaged easily during shipping.
Rebar is an essential material for reinforced concrete. Choosing the proper size, grade, and type of reinforcement bars is crucial to creating a safe, cost-effective, and durable project.
