1、钢柱上无安全爬梯供施工人员垂直上下，施工人员采用原始的攀爬方式上下钢柱，攀爬过程中由于疲劳或失手从高处坠落。

2、吊运屋面或维护墙檩条时，采用手动葫芦固定不牢固，易发生坠落，导致物体打击事故。

3、工人高处作业时未正确系用安全带、安全帽等安全防护用品。

4、安装使用的工具无安全保护绳，可能导致工具坠落伤人。

5、钢柱就位未进行校正时临时固定不牢固，导致钢柱倾覆伤人，造成物体打击事故。

6、安装屋面檩条、焊接、对接、螺栓紧固时用竹梯或脚手板搁置在钢梁上作为施工操作平台（这是在工地检查时较常见的施工方式），工人安全带系在竹梯或脚手板，边施工便往前移动竹梯或脚手板，如竹梯或脚手板有缺陷，或移动过程工人之间配合不默契会导致竹梯或脚手板滑落使在上面施工的工人全部坠落。

7、钢柱与钢梁连接安装时人员无可靠施工平台，人员悬空作业，钢梁上未设置生命索，工人直接在钢梁上行走，有高处坠落危险。

1, there is no security of steel column gym for vertical construction personnel, construction personnel USES the original way of climbing up and down steel column, in the process of climbing due to fatigue or falling from a height.

2, lifting roof purline or maintain wall, using manual gourd fixed weak, prone to falling and objects against accidents.

3 is not properly when working, workers of higher system with seat belts, helmets and other safety protective equipment.

4, install and use the tool without the safety rope, could lead to tools fall cuts.

5, steel columns in place not when correcting temporary fixed weak, cause the steel column upsetting cuts, caused the object against accidents.

6, roof purlin installation, welding, butt, bolts with bamboo ladder or aside the scaffolding on the steel beam as the operation platform (this is the site inspection is one of the more common construction mode), workers seat belt in the bamboo ladder or the scaffold board, edge construction move bamboo ladder or the scaffold board, such as bamboo ladder or scaffolding, defective or cooperate to be not the tacit understanding between mobile process workers will lead to a bamboo slip ladder or the scaffold board in the above construction workers all fall.

7, steel column and steel beam connection installation personnel is on construction platform, impending job, life is not set on steel rope, workers directly in the walking on the steel beam, there is a risk of falls.

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