... before loading, so it’s very easy to install the steel structure workshop in your there according to our installation drawings. Also, we will ... preservative treatment on this steel frame as follows,a. Clean the steel( reach to Sa2.5 Grade, China Code), then we will ... choose freely the roof and wall panel, included both types:a. Heat-Insulating material( EPS, Glass wool, Rockwool, PU, etc.)they ...