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发表于 2014-5-17 21:09:23
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我国的国家建筑标准混凝土用钢筋一般为两种即：热轧光圆钢筋和热轧带肋钢筋；国标钢筋的误差范围也是按两种不同钢筋来规定的。
一、热轧光圆钢筋的有关误差范围如下：
1、钢筋直径、不圆度的允许偏差范围：
公称直径（mm）                 允许偏差（mm）                不圆度（mm）
     6（6.5）                         ±0,3                                      ≤0.4
       8                                 ±0,3                                      ≤0.4
      10                                ±0,3                                      ≤0.4
      12                                ±0,3                                      ≤0.4
      14                                ±0.4                                      ≤0.4
      16                               ±0.4                                      ≤0.4
      18                               ± 0.4                                      ≤0.4
      20                               ± 0.4                                      ≤0.4
      22                               ± 0.4                                      ≤0.4
2、钢筋长度的允许偏差：
    按定尺长度交货的长条钢筋长度偏差允许范围为0—50mm
3、弯曲度：总弯曲不大于钢筋总长度的0.4%
4、钢筋实际重量与理论重量的允许偏差：
   公称直径（mm）           实际重量与理论重量的允许偏差 （%）           
     
      6—12                                    ±7
     14--22                                    ±5
二、热轧带肋钢筋的允许偏差内容较多在此就不在一一列出，请查看国标1499.2   2007《钢筋混凝土用钢   第二部分  热轧带肋钢筋》规范里很齐全。
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