The paper detects the 3rd floor cracks of industrial workshop in the field,analyzes cracking causes according to detection conditions, describes impact of cracks upon structural safety production,and finally puts forward suggestions of preventing cracks.%对工业厂房生产大楼第三层楼板表面的裂缝进行了现场检测，根据检测情况对裂缝产生的原因进行了分析，阐述了裂缝对结构安全产生的影响，并就裂缝的防治工作给出了一些建议。
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