矩型管产品部分参数 (GB/T3094-2000)边长/mm壁厚/mm截面面积/cm2理论重量/kg/M惯性矩/cm4截面模数/cm3403.54.93.8511.165.5845.494.5614.376.8456.985.4816.567.8767.555.9315.347.67