Fang Gang is solid, bar. Different from the square tube, hollow, belongs to the pipe

Fang Gang calculation formula Fanggang Fang Gang's theoretical weight calculation formula: side length Х0.00785=kg/m Similar bars include round steel, hexagonal steel and octagonal steel. See the national standard GB/T 702-2008 Hot-rolled steel bar size, shape, weight and allowable deviation square steel theoretical weight table Side length (mm) Cross section area (cm2) Theoretical weight (kg/m) Side length (mm) Cross section area (cm2) Theoretical weight (kg/m) 5 0.25 0.196 30 9.00 7.06 6 0.36 0.283 32 10.24 8.04 7 0.49 0.385 34 11.56 9.07 8 0.64 0.502 36 12.96 10.17 9 0.81 0.636 38 14.44 11.24 10 1.00 0.785 40 16.00 12.56 11 1.21 0.95 42 17.64 13.85 12 1.44 1.13 45 20.25 15.90 13 1.69 1.33 48 23.04 18.09 14 1.96 1.54 50 25.00 19.63 15 2.25 1.77 53 28.09 22.05 16 2.56 2.01 56 31.36 24.61 17 2.89 2.27 60 36.00 28.26 18 3.24 2.54 63 39.69 31.16 19 3.61 2.82 65 42.25 33.17 20 4.00 3.14 70 49.00 38.49 twenty one 4.41 3.46 75 56.25 44.16 twenty two 4.84 3.80 80 64.00 50.24 twenty four 5.76 4.52 85 72.25 56.72 25 6.25 4.91 90 81.00 63.59 26 6.76 5.30 95 90.25 70.85 28 7.84 6.15 100 100.00 78.50 Note: (1) In the standard part, the square steel with side length of 105-250 mm does not list the cross-sectional area and weight, If necessary, refer to multiples of the data in the table. (2) The length of square steel is as follows: A. Usually length (non-calibrated): Ordinary steel: Side length ≤25mm ................................................5~10m long Side length 26~50mm ................................................. 4~9m long Side length 53~110mm .............................................. Length 4~8m Side length ≥120mm .................................................... 3~6m long High-quality steel: Various side lengths......................................................... 2~6m long B. Cut length (determined in the contract) C. Length of doubler (determined in the contract)