Pillarless steel structure greenhouse. There should be no internal columns. There are basically no cranes and heavy objects in the warehouse shed, which is designed according to ordinary light steel. At present, the early education of light steel workshop is about 600~700 per square meter (including civil engineering and upper steel structure), and the cost of the whole workshop is about 20W. And as a reference, it will change according to the earthquake zone, snow load and building height.