1. when the steel grating is subject to hot galvanizing surface treatment, the steel grating will also be deformed at high temperature. If the steel grating has strong internal stress after welding, serious deformation will occur.
2. internal stress in steel grating matrix. When the steel grating is welded, the flat steel is not straightened, but directly welded on the mold, which looks straight on the surface. In fact, at this time, the steel grating produces relatively strong internal stress. If combined with strong external force (such as high temperature, beating and extrusion), the internal stress will show, and the shape of the steel grating will become a horizontal bow.3. during the packaging and transportation of steel grating, try to avoid falling, extrusion and impact.
