TMT bars are required for every construction project, whether residential or commercial. For any TMT bar purchase, the diameter of the bar is the most important factor to consider. Despite universal agreement on the length, diameters may range widely. The most common sizes for TMT bars are 8, 10, 12, 16, 20, and 32 millimetres. You must determine the required TMT rod weight according to the building specifications.
In this article, we will go through the process for determining the 12mm rod weight, as well as some important points to keep in mind about the weight of a TMT steel bar.
See also: Limiting area of tension steel
TMT bars: What are they?
TMT is an abbreviation that stands for “Thermo Mechanical Treatment,” which refers to a process that involves the use of heat and mechanical force. These TMT steel bars are a common material used in the construction industry to provide increased protection against earthquakes and other types of natural disasters. To guarantee the well-being of your building, TMT steel bars need to have good corrosion resistance since this will assist your construction to have a longer lifespan.
TMT bar grades
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FE 415 GRADE
TMT steel bars of the Fe 415 grade are the most cost-effective and practical option owing to their greater elongation qualities. This makes them an excellent choice for places that often experience seismic activity. Inherits qualities that make it resistant to corrosion
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FE 500 GRADE
The adaptability of the Fe-500 grade makes it a top choice for both subterranean and high-rise building projects. They’re very resilient to shocks and other environmental catastrophes because of their solid construction and high levels of flexibility and resilience.
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FE 550 GRADE
TMT steel bars of the Fe-550 grade have greater tensile strength and are used in situations where the Fe-500 grade would be too difficult to work with. Marine structures are a common use for Fe-550 material.
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FE 600 GRADE
Compared to other TMT steel bar grades, FE 600 grade TMT bars offer the greatest Tensile to yield durability, ductility, and flexibility. The TMT steel bars of this grade are used in building projects that are very weighty and call for exceptional levels of tensile and tensile and tensile strength, as well as the capacity to endure severe climatic conditions and earthquakes.
TMT bars: Formula to calculate TMT bar weight
When you purchase TMT bars, you will be required to purchase them in bundles. Each bundle of TMT bars would possess the same total weight in a standard scenario. To maintain uniformity in the weight, adherence to the standard IS:1786-208 is required. An equation may be employed to compute 12mm rod weight in kilos for each measured square metre.
Weight = D x D x L/162
In this equation for estimating the weight of TMT bars, such as the 12mm rod weight, D stands for the diameter, and L stands for the length.
TMT bars: Specifications of different TMT bars
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8 mm TMT bar
- In most cases, a single TMT bar of 8 millimetres will have a mass of 4.6 kilograms.
- Each bundle comprises 10 rods and weighs approximately 45 and 46 kg depending on where you measure it.
- 22 bundles correspond to around 1 ton.
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10 mm TMT bar
- In most cases, a single TMT bar measuring 10 millimetres will have a mass of 7.1 kilograms.
- Each bundle consists of seven separate rods and weighs approximately 49 and 50 kg collectively.
- 1 ton comprises approx. 20 bundles.
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12 mm TMT bar
- A TMT bar with a diameter of 12 millimetres typically has a mass of 10.4 kilograms for each individual rod.
- Each bundle comprises 5 rods, and the 12mm rod weight is somewhere in the range of 51 to 52 kg.
- 1 ton comprises approx. 20 bundles.
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16 mm TMT bar
- The typical weight of an individual TMT bar of 16 millimetres in diameter is 18.3 kg.
- Each bundle comprises three rods and weighs between 54 to 56 kg in total.
- 1 ton comprises approx. 8 bundles.
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20 mm TMT bar
- A TMT bar with a diameter of 20 millimetres typically has a mass of 30 kg for each individual rod.
- Each bundle is composed of 2 rods, and weights range from 58 to 60 kilograms (kg).
- 1 ton includes roughly 17 bundles.
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25 mm TMT bar
- A TMT bar with a diameter of 25 millimetres typically has a mass ranging from 44 to 48 kg for each rod.
- Only one rod is included in each individual package.
- 1 ton comprises approx. 22 bundles.
TMT bar weight chart
Refer to the TMT bars weight table provided below for an overview of the standardisation of mass measurements for TMT steel bars of varying diameters, including the 12mm rod weight.
| TMT Bars Size (in mm) | Bis Standard (in kg/metre) | ||
| min | average | max | |
| 32 mm | 6.121 | 6.31 | 6.499 |
| 28 mm | 4.685 | 4.83 | 4.975 |
| 25 mm | 3.734 | 3.856 | 3.964 |
| 20 mm | 2.396 | 2.47 | 2.544 |
| 16 mm | 1.501 | 1.58 | 1.659 |
| 12 mm | 0.844 | 0.888 | 0.932 |
| 10 mm | 0.574 | 0.617 | 0.66 |
| 8 mm | 0.367 | 0.395 | 0.423 |
TMT bar weight and length chart per bundle
| TMT Steel Bar pieces each bundle (Numbers) | Length of TMT Steel Bar (in metres) | TMT Steel Bar Sizes (in mm) | Total Mass of TMT Steel Bar Bundle (in kg) |
| 10 pcs | 12 m | 8 mm | 45 Kg |
| 7 pcs | 12 m | 10 mm | 48.72 Kg |
| 5 pcs | 12 m | 12 mm | 51 Kg |
| 3 pcs | 12 m | 16 mm | 54.36 Kg |
| 2 pcs | 12 m | 20 mm | 57.6 Kg |
| 1 pc | 12 m | 25 mm | 45 Kg |
| 1 pc | 12 m | 28 mm | 56.4 Kg |
| 1 pc | 12 m | 32 mm | 74.21 Kg |
TMT bars: Considerations regarding the weight of TMT steel bars
- The standard length of a TMT Steel Bar is often considered to be 12 metres. This is the general rule.
- IS guidelines stipulate that the bulk acceptance standard for TMT steel bars is typically IS 1786:2008.
- TMT steel bars may have diameters of 32, 28, 25, 20, 16, 12, or 8 millimetres when they are manufactured.
- Kilograms, tons, or quintals are the most common units of measurement for TMT steel bars.
FAQs:
What differentiates FE 500 and FE 500D?
Fe500D TMT bars are more ductile than Fe500 TMT bars, even though their tensile strength remains identical. In comparison to Fe-500, Fe500D is more readily deformed under tension.
How many variants of steel bars exist?
TMT steel bars come in four different grades in the Indian market. They include Fe-415, Fe-500, FE-550, and Fe-600.
Which grade of TMT rod is best?
There are many applications for various grades and types of steel bars. It is categorised according to the strength and ductility of the material. It is best to get the advice of an expert on TMT steel bars before choosing which kind of steel bar will serve your building needs in the best possible manner.
Which grade is employed to construct a house?
Fe-415 is the most popular and cost-effective option for residential buildings. Experts suggest Fe-500 grades if you want your property to be very sturdy and protected from earthquakes.