Rib lath is made by joint cutting and expanding with rolled steel sheet at normal temperature. The rolled steel sheet should be in accord with regulations of GB2518-88. Rolled to steel mesh with thickness of 0.4-0.5mm, the steel material will be made good use in a large degree(near to 200%). The construction mould wire mesh will form a trabecular structure after processed by steel sheet, etc. We can call it "a new type of walling"