The edge protection fence of the foundation pit, also known as the foundation pit fence, is an indispensable safety protection equipment for construction sites such as subway buildings. According to relevant regulations, protective fences must be installed around the excavation depth of the foundation pit exceeding 2 meters. The foundation pit fence should comply with the following regulations:

1. The height of the foundation pit guardrail should not be less than 1.2 meters.

2. The foundation pit guardrail should be equipped with dense mesh safety nets and toe boards. The safety net should be closed from top to bottom, and the height of the toe board should not be less than 18 centimeters. The height of the bottom edge of the toe board above the ground should not be greater than 10mm.

3. The foundation pit guardrail should be composed of horizontal bars and columns, with 2-3 horizontal bars set up. The height of the lower bar from the ground should be 0.3-0.6 meters, and the height of the upper bar from the ground should be 1.2-1.5 meters. The distance between the vertical bars should not be greater than 2 meters, and the distance between the vertical bars and the slope edge should be greater than 0.5 meters.

4. The foundation pit guardrail should be installed firmly and the material should have sufficient strength.

5. Special staircases for construction personnel to go up and down should be set up inside the foundation pit. The staircases should be equipped with handrails and railings, and the width of the staircases should not be less than 1 meter. The construction of the staircases should comply with regulatory requirements.

When purchasing foundation pit guardrails, it is necessary to strictly follow the relevant specifications for identification and selection, select products with strong practicality, and ensure construction safety.