... 2. Good quality steel grating 3. Easy installation & saving work time. Advantages of steel grid plank: light weight, strong intensity ... of which 50 and 100mm arerecommended3) Advantages of steel grid planks: light weight, strong intensity, big load capacity, ... 20, 23.85, 25, 30, 30.16, 30.3, 32.5, 34.3, 35, 38.1, 40, 41.25, 60, ... DIN24537-1-2006, Japan:JIS steel grating for ceiling grate cover (factory)