<p>A mold for use in continuous casting of metals in which the backup plates are fastened to the liner by a novel means. The outside faces of the liner have a series of vertical ribs which define with the backup plates a plurality of water-circulation passages. Certain of the ribs have laterally directed lips under which metal strips are inserted. The strips carry studs which extend through the backup plates. Nuts are threadedly engaged with the studs and drawn up tightly. The water-circulation passages are unobstructed and all have the same hydraulic diameters, which are constant throughout the length of the passages. Hence water flowing through each passage has the same velocity.</p>
