矩形方钢管的型号规格如下：
尺寸（mm）: 30x30x3, 40x40x4, 50x50x5, 60x60x6, 70x70x7, 80x80x8, 90x90x9, 100x100x10, 120x120x12, 150x150x15, 200x200x20, 250x250x25, 300x300x30, 350x350x35, 400x400x40, 450x450x45, 500x500x50, 550x550x55, 600x600x60, 650x650x65, 700x700x70, 750x750x75, 800x800x80, 850x850x85, 900x900x90, 1000x1000x100
壁厚（mm）: 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 20, 22, 24, 25, 26, 28, 30, 32, 35, 40
截面面积（cm²）: 2.25, 3.00, 3.75, 4.50, 5.25, 6.25, 7.29, 8.41, 9.84, 11.56, 13.64, 15.76, 18.44, 21.96, 25.92, 29.88, 34.18, 38.84, 43.76, 49.28, 55.26, 61.62, 68.36, 75.42, 82.84, 91.06, 100.00, 109.82, 120.00, 130.49, 141.30, 153.06, 165.62, 178.44, 192.70, 207.92, 223.86, 241.28, 259.64, 278.80, 299.16, 320.32, 342.28, 365.04, 388.60, 413.96, 439.84, 466.52, 494.92, 524.08, 553.84, 584.40, 616.64, 649.68, 683.52, 718.24, 753.86, 789.40, 826.72, 865.84, 905.76, 946.60, 988.24, 1031.68, 1076.80, 1123.64, 1172.28, 1222.64, 1274.80, 1328.72, 1384.48, 1441.92, 1501.28, 1562.44, 1625.40, 1689.28, 1754.96, 1822.44, 1891.80