What are the normative requirements and functions of the edge guard? The edge guard is an indispensable safety protection article for subway buildings and other construction sites. According to relevant regulations, the perimeter of the foundation pit with an excavation depth of more than 2m must be equipped with a guard.

临边护栏应符合以下规定：

The edge guardrail shall meet the following requirements:

1、防护栏护栏高度不应低于1.2米。

1. The height of guardrail shall not be less than 1.2m.

2、防护栏应由横杆及立柱组成，横杆应设置2-3道，下杆离地面高度为0.3米-0.6米，上杆离地高度为1.2米-1.5米，立杆间距不宜大于2米，立杆离坡边距离大于0.5米。

2. The protective fence shall be composed of cross bars and columns. The cross bars shall be set with 2-3 courses. The height of the lower bar from the ground shall be 0.3m-0.6m, the height of the upper bar from the ground shall be 1.2m-1.5m, the spacing between upright bars shall not be greater than 2m, and the distance between upright bars and slope edge shall be greater than 0.5m.

3、防护栏应加挂密目网和挡脚板，网应自上而下封闭设置，挡脚板高度不应小于18公分，挡脚板下沿离地高度不应大于10mm。

3. The protective fence shall be equipped with dense mesh safety net and toe board. The safety net shall be closed from top to bottom. The height of toe board shall not be less than 18 cm, and the height of the lower edge of toe board from the ground shall not be greater than 10 mm.

4、防护栏应安装牢固，材料应有足够的强度。

4. The protective fence shall be installed firmly and the material shall have sufficient strength.

5、基坑内应设置供施工人员上下的专用梯道，梯道应设置扶手栏杆，梯道的宽度不应小于1米，梯道搭设应符合规范要求。

5. The foundation pit shall be provided with special stairways for constructors to go up and down. The stairway shall be provided with handrails. The width of the stairway shall not be less than 1m, and the erection of the stairway shall meet the specification requirements.

临边防护栏的作用：

Function of edge guard:

1.使工地更加整洁美观、文明。

1. Make the construction site more tidy, beautiful, civilized and safe.

2.预防过往机动车辆靠太近基坑边缘而造成塌方。

2. Prevent landslides caused by passing motor vehicles too close to the edge of the foundation pit.

3.防止工人不小心掉入基坑。防止杂物掉入基坑，从而对基坑内作业人员造成伤害

3. Prevent workers from accidentally falling into the foundation pit. Prevent sundries from falling into the foundation pit, thus causing injury to operators in the foundation pit

立柱与立柱之间的距离应该小于或等于2米，来增强基坑护栏的抗击性。

The distance between columns should be less than or equal to 2m to enhance the resistance of foundation pit guardrail.