Electro-forged gratings are sturdy grids of bearing bars and crossbars. The bearing bars made from steel strip are not notched or punched. The crossbars of drawn and twisted steel are, contrary to the manufacturing of pressed gratings, pressed into the bearing bars and resistance welded at every joint to ensure high rigidity. These grating mats form the basis of tailor-made precision gratings with multiple applications. Also, one or two additional cross bars can be added to prevent objects from falling through. To enhance the anti-slip effect for e.g. offshore industry, these gratings are produced with serrated bearing bars.