... Tall Buildings" (JGJ99-98)3.Commonly used steel grades and performance of steelCarbon structural steel: Q195, Q215, Q235, Q255, ... & roof can be used by steel sheet, EPS sandwich panel, rock wool sandwich panel & PU sandwich panel. We can quote if you can offer the following ... Roof height and Eave HeightRoof and Wall PU,EPS,Rock Wool sandwich panelDoor and Window PVC or Aluminum AlloyColumn and Beam ...