Installation instructions for a fence made of welded sections
1. We assemble the first 3D section with poles, dig holes for the poles (about 50-70 cm, depending on the depth of soil freezing in the area where the fence is being installed.).
If you are installing a fence (fencing) of 3-d or 2-d sections on a concrete foundation, then the concrete foundation should be done when you already have sections ready. This is necessary in order to correctly choose the distance between the anchor bolts for attaching the pillars or the distance between the metal seats, if you plan to weld the heel of the column to the base.
Alternatively, in the process of installing a welded mesh fence , you can dig a hole 50 cm deep, and then drive a post into the bottom of the hole another 20 cm if you plan to dig a post to a depth of 70 cm.

2. We expose the level and height of the intake section assembled with the pillars. We concrete.

3. We fasten the 3-d (2-d) section to the previous fence post.

4. And only after that we set the next pole according to the level, we fasten the next section of the fence to it. When the heights match and the level is correct, we concrete the column.

After installing the fence sections, we attach gates and gates to them.
Fasteners, posts and sections for the fence can be bought at PE Metizy-94
Video instructions for installing a fence from welded sections.