How to bury the posts of the guardrail net

There are two general ways to install metal guardrails: pre-buried and flange. The installation base of the flange is usually cement ground, and the posts of the wire guardrail are fixed by expansion screws. Since most open spaces are land and there is no cement foundation, the open space fence is mostly pre-buried. How to bury the posts of the pre-buried metal fence firmly? After digging the pit (generally the posts of the guardrail are buried 30 cm underground), place the posts, pour cement and use straight rods to support the posts in a triangular shape. After the cement is dry, install the posts and mesh. In this way, the buried posts are stable.