什么叫洞口作业？--qsf999的安全生产小屋

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什么叫洞口作业？ | 2012-4-11 11:02:00

什么叫洞口作业？

施工现场，结构体上往往存在各式各样的孔和洞，在孔和洞边口旁的高处作业统称为洞口作业。
孔与洞的区分，则以其大小来划分界限，水平方向与铅直方向也略有不同。如楼板、屋面、平台等水平方向的面上，短边尺寸小于25cm的，在墙体等铅直向即垂直于楼、地面的面上，高度小于75cm的均称为孔。在楼板、屋面、平台等水平向的面上，短边尺寸等于或大于25cm的，在墙等垂直的面上，高度等于或大于75cm，宽度大于45cm的，均称为洞。此外，凡深度在2m及2m以上的高处作业，亦称为洞口作业。
除上述洞口外，常会有因特殊工程和工序需要而产生使人与物有坠落危险或危及人身安全的各种洞口，这些也都应该按洞口作业加以防护。

By:qsf999 | 阅读全文 | 回复(13) | 引用通告 | 编辑

Re:在漫画中识别身边的违章 | 2017-2-20 14:22:27

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Re:在漫画中识别身边的违章 | 2016-10-22 16:07:11

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Re:在漫画中识别身边的违章 | 2016-10-22 9:51:44

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Re:在漫画中识别身边的违章 | 2016-10-22 4:25:47

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Re:在漫画中识别身边的违章 | 2016-10-20 13:17:38

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Re:在漫画中识别身边的违章 | 2016-10-18 3:38:34

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Re:在漫画中识别身边的违章 | 2016-10-13 2:54:08

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Re:在漫画中识别身边的违章 | 2016-10-10 3:01:52

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原创 | 2016-9-30 15:50:36

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原创 | 2016-9-6 21:33:15

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