Firstly, the pedestal needs to be made, that is, the pedestal supporting the arch needs two pieces of iron sheets, and then three pedestal slots (the diameter of circular steel members is larger than the supporting columns) are welded on the iron sheets of the pedestal according to equilateral triangles;

As a support column, three circular steel members with a diameter slightly smaller than the socket of the base are horizontal enough (two support columns need six circular steel members), and they are also welded with equilateral triangles. When welding, the length of steel bar as the welding point of three circular steel structures is1.70m.

Finally, three circular steel structure members with the same diameter as the base groove are selected to make arch members, and the three round steels are processed into circular arches with a certain range in advance, or the arch distance is about 40CM; Using the principle of equilateral triangle, and then welding with steel bar.

Finally, six round steels with the same diameter as the base groove and the length of 10M ***6 are welded at both ends of the circular arch to connect with the supporting column.