Composition of foundation pit guardrail

The municipal foundation pit guardrail, also known as the foundation pit guardrail, is composed of protective mesh and columns, connected by electric welding. The foundation pit guardrail protective mesh is composed of 2cm × 4cm square tubes welded together, with a single piece size of 1.1 meters × 1.7 meters. Both ends are equipped with cross ears connected and fixed to the columns with Φ 10 bolts, and the distance between the cross ears and the upper and lower edges is 15cm. The columns are made of 8cm square tubes with a height of 1.3m, and have flanges (8mm × 15cm × 15cm steel plates) at the bottom. Each flange has 4 bolt holes, and the top is closed. It is fixed to the ground with Φ 14 expansion bolts. After installation, the upper edge of the foundation pit guardrail should be level with the column, and the lower edge should be 20cm from the ground. The distance between the two columns should be 2 meters All raw materials used are made of national standard materials, strictly constructed according to the drawings, with correct dimensions and strong welding points, achieving the purpose of safety protection. The design of the foundation pit guardrail is yellow, and the columns are red, both of which are painted to achieve a red and white warning effect.