Quick detail: 1. Long length can provide larger space, and can make full use of the building. 2. The strength of heavy steel building is more solid and has a longer quality guarantee period. Standing director of china's construction and metal structure association Member of china's steel structure association and shanghai metal structure industry association Industry association Specifications Grade: q235, q345 Products&service scope: design&engineering service, steel building, space frames, portable cabins, tubular steel structures, basic building elements(built-up welded h-section , hot-rolled h-section, channel, steel column, steel beam), standard frames, secondary framing, roof & wall materials, tempcon (sandwich) panels. And we offer bespoke design, construction and erection of specialist industrial steel buildings and steel frame agricultural buildings including full structural design and build covering all aspects of steelwork prefabrication. Engineering design software: pkpm, 3d3s, x-steel, etc.