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To calculate the weight of TMT (Thermo-Mechanically Treated) bars, you need to know the following parameters:

1. Diameter of the TMT bar (in millimeters).
2. Length of the TMT bar (in meters).
3. Density of the TMT bar material (usually around 7850 kg/m³).

Once you have these values, you can use the following formula to calculate the weight of the TMT bar:

Weight = (π * (Diameter/2)^2 * Length) * Density

Where:

• π is the mathematical constant (approximately equal to 3.14159).
• Diameter is the diameter of the TMT bar in millimeters.
• Length is the length of the TMT bar in meters.
• Density is the density of the TMT bar material in kilograms per cubic meter.

Here’s a step-by-step example:

Let’s say you have a TMT bar with a diameter of 12 millimeters and a length of 10 meters.

Diameter = 12 mm Length = 10 meters

First, you need to convert the diameter from millimeters to meters:

Diameter = 12 mm = 12/1000 meters = 0.012 meters

Now, you can plug these values into the formula:

Weight = (π * (0.012/2)^2 * 10) * 7850

Weight = (3.14159 * (0.006)^2 * 10) * 7850

Weight = (3.14159 * 0.000036 * 10) * 7850

Weight = (0.001128 * 10) * 7850

Weight = 11.28 kg

So, the weight of the TMT bar with a diameter of 12 millimeters and a length of 10 meters is approximately 11.28 kilograms.