The formula to calculate the area of a steel bar is A = πr^2, where A represents the area and r is the radius of the steel bar. This formula assumes that the steel bar is circular in shape. If the steel bar is a different shape, such as rectangular or square, the formula to calculate the area would be different based on the dimensions of the bar.
Most rebar (steel reinforcement bar) is approximately round. Measure the diameter of the bar, that is, the thickness of the bar. Divide the measurement by 2 to get the radius. Use the formula pi x r2 (3.14 x radius x radius) to get the cross sectional area. The formula works for all measurement units whether they are inches, millimeters, centimeters or others. An alternative is to use (pi x d^2)/4. (3.14x diameter x diameter divided by 4) You do not then need to divide the original diameter.
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Density = mass/volumeThe unit weight of steel is 7850 kg/m3volume of bar = (πd2/4)*Lhence mass = ((πd2/4)*L)*7850= ((3.14 *d2/4)*1)*7850 for unit length= 0.785*d2*7850= 6162.25 d2 if d is in metersor d2 /162 if d is in mm.By putting the value of diameter of rod, you can calculate the unit weight of any size tmt bar.
The channel is U-shaped cross-section, while the crossbeam is can be divided into H-plate, I-beam, etc. Both of them have different uses.
Their is formula given in a code i think SP-32 L=N*Pie(D+d)+8d L=Length of Spiral rings N=Number of Spirals Pie=3.142(constant) D= Diameter of pile cage(spiral C/C) d=diameter of bar
Formula for steel bar weight per meter = D2/162 where D is diameter of bar
If the bar is circular then it is: pi*radius square
volume of steel multiplied by7850= wt of steel in kgs. Please note that wt of 1 Cum steel is 7850 kg Volume of steel bar can be calculated = cross-sectional area of bar X length cross-sectional area of Bar= pie x d X d/4 (where d is diameter of bar)
Calculate cross sectional area of 10mm bar amd 8mm bar, then divide them and you will get the no. of bars. For Eg. - Area of 10mm bar = 78.53 sq.mm Area of 8mm bar = 50.26 sq.mm No. of 8mm bars in replacement for 10mm bar = 1.562 bars [ theoritical] In practical u'll provide 2-8mm bars.
formula calculation of steel round bar > Area (square metres) of cross section * 7850 = kilograms per metre length. For other lengths, multiply answer by length in metres.
The formula to calculate the weight of a Teflon round bar is weight = volume x density. First, calculate the volume of the round bar using the formula for the volume of a cylinder: volume = π x (radius)^2 x length. Next, multiply the volume by the density of Teflon to find the weight of the round bar.
Assume area of circle= area of squareπd2/4=L2L=0.88263 x dDeduct the cover from L from both sides. This will be length of bar
cell or formula bar!
Assuming that the bar is made of steel & of circular cross-section & loaded in simple tension, Stress= Load applied/area of the bar. In SI units, area = Pi x (diameter)2/4 "square metre" Apply the load in "Newtons". then calculate the stress developed in N/m2
d*d/162
l multiply 2.66 multiply (D)squre
2.9876 kg/m is the weight of steel bar of 22 mm dia..and you use formula for other bars as d*d/162 Where d is a diameter of bar in mm.